RV and Camper Rooftop Air Conditioner Maintenance, Troubleshooting, and Repair

Updated on January 24, 2019
Randy Godwin profile image

Randy is a lifelong lover of the outdoors and especially camping. His articles are intended to help the RVer save money and time on repairs.

Source

Camper Trailer and Motorhome RV AC Servicing

Since the majority of motor homes, camper trailer, or RV A/C systems are used during the hottest time of the year, it is a must to keep them in good operating order. Merely cleaning and replacing the filter is not good enough to maintain your RV AC in tip-top condition.

There are certain procedures for guaranteeing the maximum efficiency of your motorhome or camper trailer A/C unit. These steps are not as difficult to perform as you might think and will save you money and inconvenience as well.

Cleaning the condenser and evaporator annually will make a huge difference in the cooling ability of the motorhome or camper trailer RV unit. Lubricating the A/C fan motor may help extend the life and performance of the unit itself.

You will also learn a little about how these RV cooling units differ from regular household units by following the tips in this article. Be sure and check the many actual questions and answers in the comments at the bottom of this page to find a problem similar to yours if the info is not found in the main text.

Gaining Access To The RV AC Unit

Removing the shroud from a Coleman rooftop AC.
Removing the shroud from a Coleman rooftop AC. | Source

Keeping Your AC Cool

Airstream Sovereign With Coleman Mach Rooftop AC
Airstream Sovereign With Coleman Mach Rooftop AC

Brands and Models of Rooftop RV AC Units

There are several main producers of rooftop units. Coleman RV air conditioners are common on many of the best equipped motorhomes and camper trailers. The same can be said for Carrier AC units, as well as Duo Therm A/Cs. Dometic made one of the first rooftop air conditioners, as well as camper refrigerators and ice machines.

Thankfully, all of these units are similar in function and design. Some of these cooling units may even be identical under the shroud. Being familiar with household AC units will aid you greatly in servicing and repairing your air condition system, but there are a few differences as you will see.

Source

Troubleshooting RV AC Units

Before beginning any repair or maintenance step, it is helpful to familiarize yourself with the main components of the rooftop AC unit itself. A fan motor circulates the air from the interior of the motorhome or camper trailer through the RV AC unit where it is cooled and then returned into the RV interior.

The compressor performs the job of circulating the Freon through the condenser and evaporator coils cooling fins and the cycle is repeated as the thermostat setting deems it necessary.

Both the compressor and the fan motor use capacitors to provide a high voltage charge to get them moving and a lesser charge to keep them running.

Often, only one capacitor is used for both fan and compressor. It the capacitor goes bad, neither the fan nor the compressor will start. This part is easily replaced and is not very expensive to purchase in most cases.

Source

Rooftop A/C Shroud

The AC shroud showing retaining screw holes
The AC shroud showing retaining screw holes

Rooftop RV AC Shroud Removal

In order to clean or repair the RV AC unit, it is necessary to remove the shroud from atop the unit. Ordinarily this is a simple job requiring only a Phillips screwdriver or small wrench. Remove the four screws or nuts from the AC shroud and carefully slide it up off of the unit.

If the shroud is old, it may be cracked around the retaining screws or the vent holes on the sides and back. Now is the time to repair the bad spots before replacing the shroud.

A good quality epoxy cement, or other glue made for plastic repairs, should be used to reinforce the weak or broken place before replacing the shroud. It is also advisable to use wider washers on the shroud retaining screws to prevent further cracking.

If the damage seems too bad to repair, a new RV shroud may be the only option. A broken RV A/C shroud will decrease cooling efficiency plus pose a danger of flying off while the camper is in transit .

Accessing the Fan Motor and Fans

The Coleman Mach  A/C Fan Motor made by Fasco
The Coleman Mach A/C Fan Motor made by Fasco
The rooftop unit With Condenser Cover removed
The rooftop unit With Condenser Cover removed

Servicing and Repairing the RV A/C Fan Motor

With the shroud removed, it is easy to inspect the fan motor for any repairs or maintenance needed. Before doing any repairs or maintenance to the rooftop RV AC be sure to turn the electrical breaker off or unplug the motorhome or camper trailer from the electrical power source. The starting capacitor may be still charged with high voltage, so be sure not to touch it with the bare hands.

The fan should spin easily when turned by hand. Even so, it is a good idea to oil the bearings and clean the accumulated debris from both front and rear fan blades. It may be necessary to loosen the fan motor from its mountings to fully access both ends of the motor bearings.

If the RV fan motor has oil tubes to lubricate the fan, then simply put a few drops of machine oil in the tubes on either end of the motor. If the motor has sleeves instead of ball bearings, you may still dribble a small amount of oil on the sleeves where they contact the fan motor shafts. Even a small amount of oil will do wonders for these types of fan motors.

If the AC fan motor still seems to start slowly or needs a nudge to start working, it is recommended that you replace it with a new one. If the fan motor has oil tubes evident on each end of the motor, it may be rebuilt and replaced for much less than buying a new one. It all depends on the particular unit on your camper.

If either the fan motor or compressor fails to start a new starting capacitor may solve the problem. Be sure to order the right size and voltage for your rooftop unit. These capacitors may be found at your local AC parts dealer or you may find them online for greater savings. Be careful when handling these capacitors as they may still hold some electrical charge.

This Condenser Needs Cleaning

Spray cleaner and a shop-vac will do the job.
Spray cleaner and a shop-vac will do the job.

Cleaning the RV AC Condenser and Evaporator

It is recommended that you clean the condenser and evaporator fins every couple of years to maintain the efficiency of your RV air conditioner. Eventually, the cooling fins on these units will become clogged with dirt and dust.

Use a good spray or foaming cleaner, such as those shown here, to loosen the debris and then use a wet/dry shop vac to remove the loosened dirt and dust. Be sure to cover the vent leading down into the interior to keep the grime from seeping down inside.

Be careful not to bend these fine fins as they will bend easily. A special fin comb tool made just for straightening these fins may be purchased from an RV AC parts dealer or through links on this page. Once again, be careful when performing this maintenance procedure.

Bent fins inhibit the flow of air through the unit, so be sure to keep them as straight as possible using the fin comb. You may need to use a fin straightening tool to align any bent fins in the evaporator or condenser coils.

Oh No! Not A Bad Compressor

A bad capacitor is often the problem if the compressor won't start.
A bad capacitor is often the problem if the compressor won't start.

RV AC Compressor Repair or Replacement

The most costly and difficult part of an RV AC unit to replace or repair is the compressor. In many cases it is advisable to simply replace the unit instead of trying to replace the compressor. With a new unit costing about $500 to $600, spending $300 to $400 dollars for compressor replacement doesn’t make much sense.

The labor involved, plus the prohibitive cost of the compressor, can almost pay for a new RV rooftop unit. These units are very easily replaced and will have a new warranty to cover future repairs for a few years. This is usually the correct option when the compressor goes bad.

The alternative is to find a used compressor. Unless you are skilled in replacing the compressor and are able to recharge the unit with freon, this is not advisable. This step is entirely up to your skills and pocketbook. There are used RV A/C parts available online and locally in some cases.

FAQS about RV AC Repairs

Be sure and check the many questions and answers in the comment section below. Feel free to ask a question if you don't see a similar question and answer, or simply ask the question if you don't have time to peruse all of the comments.

If you've encountered a strange problem and/or solution, please leave a comment below so others may learn from it. Thanks for any advice you may have to offer too! Thanks for relating any odd problem with your camper A/C and or the solution.

Now, Enjoy Your Camping Trip

If properly maintained and serviced, your motorhome or camper trailer A/C will last for many years of camping excursions. Most maintenance can be performed by the owners if they have basic mechanical skills. Understanding how an AC unit works may just save that camping trip you have been looking forward to for so long.

Be careful and take photos of the unit before removing any parts which may cause confusion during reassembly. Be sure to protect the roof of your RV while servicing your rooftop unit. Good luck with your repairs and maintenance.

This article is accurate and true to the best of the author’s knowledge. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters.

Comments

    0 of 8192 characters used
    Post Comment
    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 weeks ago from Southern Georgia

      Sandra, you may to remove the covering beneath the motorhome itself to access the plumbing properly. There's no easy way to do it I'm aware of.

      Randy

    • profile image

      Sandra 

      3 weeks ago

      I have a 1992 motor home, im told that i would need to take it to the dealership to redo the full plumming. An RV repair man said the acces to the pipes are in between the frame and the floor.. How can i find out if there is any access points. For the bathroom there is one behind the shower and on the outside of the bathroom wall. For under the sink it's by the oven... but what About everything else

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      4 weeks ago from Southern Georgia

      William, the AC thermostat is controlled by the 12 volt system. Try connecting a good battery charger up to the battery(s) and if things work normally a new converter may be needed.

      Randy

    • profile image

      William75407 

      4 weeks ago

      Randy, have a 2001 Road Ranger with Dometic roof top a/c. Today while a/c was on, the motor just slowed down to a stop. After turning off for about 30 minutes, turned it back on but it seems to be running at less than half speed. My 12v system went out 4 days ago when turning on some lights since it was getting dark. After maybe 20 minutes the 12v system came back on but lights are dimmer than before

      Himking i need to replace converter. Could this also be why a/c now has problems or just a coincidence?

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      4 weeks ago from Southern Georgia

      Rich, the warm exhaust should exit from the rear of the units. The only way they should be exhausting into the camper is if they're installed facing the wrong way.

      I had a reader who installed his unit in backwards who experienced the same issue.

      Randy

    • profile image

      Rich 

      4 weeks ago

      Hey Randy I have a Coleman Mach which way is the exhaust supposed to flow out of the unit or into the unit. Both units are blowing in.

      Thanks.

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      5 weeks ago from Southern Georgia

      Danny, it's not uncommon for a mud dauber to affix a nest to either the bladed fan or inside the squirrel cage fan. This will cause the fan motor to be out of balance and shake violently. Check both fans.

      Randy

    • profile image

      Danny 

      5 weeks ago

      When I turn my rooftop actually unit on it makes a loud noise and shakes the roof on my 2018 jayco Jay flight travel trailer.what can be causing this

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      6 weeks ago from Southern Georgia

      Robert, the repair guy may be correct.

      Randy

    • profile image

      Robert 

      6 weeks ago

      It's 91° it's running and cooling but it seems to have a Hummer noise and starts over serviceman said is a way it keeps from freezing up cause of the humidity is so high

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      6 weeks ago from Southern Georgia

      Adam, this sounds like either a bad thermostat or control board. Check the stat before replacing the board.

      Randy

    • profile image

      Adam 

      6 weeks ago

      Randy, my AC blows cold but the fan doesnt seem to be changing speeds. It is barely blowing. What could he going on here?

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      7 weeks ago from Southern Georgia

      Justin, this sounds more like a lack of power than a capacitor. Check the voltage at the AC breaker.

      Randy

    • profile image

      Justin Hall 

      7 weeks ago

      Connected to 15amp receptacle on new plug (new construction). Everything in camper works fine except the AC unit. Will not make any noise, will not turn on. Not even the fan will come on. AC prep connected properly. Should I start replacing the capacitors (believe there are different ones, (run, hard start, and fan capacitor) in my Coleman Mach? Not sure where to start? I did use my non contact voltage detector on the wires in the interior of the campers ac unit where the wiring harness was with no red light meaning no power. Maybe something is wrong with the AC prep?

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      7 weeks ago from Southern Georgia

      Phillip, yes this does indeed sound like the Freon has leaked out of the system. A recharge may be in order.

      Randy

    • profile image

      Philip Creel 

      7 weeks ago

      Hi Randy, Haven’t used my 2015 Forrest River Surveyor Camper since last fall. Turn on air and compressor kicks on but not putting out cold air. Left a/c on for hours and still not cool. What should I check first?

    • profile image

      Philip Creel 

      7 weeks ago

      Compressor on my 2015 Forrest River Surveyor rooftop a/c comes on but it doesn’t blow cold air. Could it need freon?

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      8 weeks ago from Southern Georgia

      Dee Dee, sorry but I've retired from RV repairs. I do have several step-by-step articles showing how easy it is to replace an RV AC.

      Check my profile page to find them. If you can't , then let met know and I'll put the links on this comment section.

      Randy

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      8 weeks ago from Southern Georgia

      Chelsea, you may need to clean the coils in your AC. The one behind the filter especially. The reason water is dripping is the coils are too dirty to allow the fan to disperse the excess moisture into the air.

      Dirty coils will also cause the compressor and fan to work harder than necessary and can cause the compressor to overheat. They also obstruct the airflow from the AC.

      Get some no-rinse spray foaming coil cleaner and follow the directions on the can. You can find it at Home Depot, Lowes, or ACE Hardware.

      Randy

    • profile image

      Dee Dee 

      8 weeks ago

      Hi Randy....do you do the istallaion of ac ? Im in hampton, ga and cant find anyone experience. I have a 2019 sprinter van. Please help!!

    • profile image

      Chelsea 

      8 weeks ago

      We r down in Louisiana full time for the summer with weather reaching 110 daily. We have our bedroom 2016 Dometic ac running 24/7 and it will drip water most commonly at night but will occasionally drip during the day off and on for a few hours.

      The drip tray is really clean and not clogged, we have noticed condensation collecting in other areas where it is not supposed to then going straight into our camper. This is not surprise us considering our location, is this normal and we are just over running our AC, or should our AC able to handle this kind of weather as much as we want it to?

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      2 months ago from Southern Georgia

      Bruce, were you having problems with the old one?

      Randy

    • profile image

      Bruce galbraith 

      2 months ago

      A repair man told me that my ac was bad it was suppose to put out 12 watts and it was outting out 17 on 15000btu i looked up info and it said 12 to 17 watts i already bought one but will leave it for next year.

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      2 months ago from Southern Georgia

      Maria, I too think it is a bad capacitor. You can check it with a multimeter to be sure the repairman isn't mistaken.

      With the multimeter set on ohms, you should get a random number decreasing in value as long as you hold the probes to the terminals if the cap is good. If not, it's bad. Hope this helps.

      Randy

    • profile image

      Maria 

      2 months ago

      I have a 2016 Cherokee limited by forest with a dometic ac unit. My question is it was working just fine then all of sudden stopped blowing air and started making a humming noice. Also i have norcold fridge that red check light came on to check gas. Can these two problems be related. By the way i had a "repair man" come out and told me i need a new ac unit that it wasnt the capacitor like i thought. Idont feel like he checked it correctly he the capacitor he tried looked used. But what do I know

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      2 months ago from Southern Georgia

      Wolfbrand, what has you concerned about the rooftop AC? These campers are made to support the weight of the unit and the vents are already the correct size. Should be a simple job.

      I have another article on my profile page which shows the stages of installing an AC. You might want to check it out.

      https://axleaddict.com/rvs/How-To-Replace-An-RV-Or...

      or

      https://axleaddict.com/rvs/Airstream-Travel-Traile...

    • profile image

      Wolfbrand 

      2 months ago

      Hi Randy,

      I recently purchased a 2005 Fleetwood Taos and would like to put AC in it. I am not sure if it will handle a roof type AC

      Any thoughts?

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      2 months ago from Southern Georgia

      Dillian, this may be due to a weak capacitor. Cheap and easy to replace.

      Randy

    • profile image

      Dillian 

      2 months ago

      My Colman is starting up and blows cold air but makes a grinding noise and doesn’t blow a steady stream of air it cold but it will stop blowing and just make a awful humming noise.

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      2 months ago from Southern Georgia

      Doni, more than likely a bad capacitor. Cheap and easy to replace.

      Randy

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      2 months ago from Southern Georgia

      Steve, yes it sounds like the control board needs replacing.

      Randy

    • profile image

      DoniAdams 

      2 months ago

      We’ve lived in our rv for three wks now. Air was so cold and now it just blows warm. It’s the central air

    • profile image

      Steve 

      2 months ago

      I have a Coleman ducted unit.when the thermostat shuts it off or you manually turn thermostat to off everything except the compressor shuts off I disconnected the thermostat wire's from the unit and the compressor still runs . sounds to me like control unit what's your thoughts ?

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      2 months ago from Southern Georgia

      Curtis, this is normal if the cap is indeed bad.

      Randy

    • profile image

      Curtis 

      2 months ago

      Ac seems to be pulling to much power. I bought a new capacitor and when i went to install the new compactor there was no stored power in the old capacitor. Is this normal?

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      2 months ago from Southern Georgia

      Matthew, check or replace the compressor capacitor as it's probably bad. Around 25 bucks or so and easy to replace.

      Randy

    • profile image

      Matthew Mertz 

      2 months ago

      Hi Randy..i have a 96 mallard. 26m model.the trailer has been sitting for 10 years without any servicing..i just bought it the ac fan working but no cold air ?

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      2 months ago from Southern Georgia

      Barbara, bad capacitor hopefully. Easy to replace and relatively cheap.

      Randy

    • profile image

      Barbara 

      2 months ago

      I have a 2013 LTVan with a Dometic duo therm, when it runs for an hour or so in shore power it trips the breaker, does the same when runs on the generator. Bad capacitor or breaker? Thoughts?

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      2 months ago from Southern Georgia

      Misty, most can be recharged even though they don't normally have a port like an automobile. You'll need to have an AC serviceman do this for you. unless you have the right gauges and a vacuum pump.

      Randy

    • profile image

      Misty Brown 

      2 months ago

      Randy,

      I was told you can't charge the units anymore. You have to buy a new one because they don't sell R22 anymore? What do I charge it with this is a Coleman unit.

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      2 months ago from Southern Georgia

      Clyde, if the coils are clean then you may have a weak capacitor. Cheap and easy to replace.

      Randy

    • profile image

      Clyde 

      2 months ago

      Coleman Mach AC runs fine for anywhere from 30 minutes to 4 hours then shuts off. Airxcel cool/heat thermostat running in cool/high and cool/low mode.

      Thanks in advance.

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      2 months ago from Southern Georgia

      Scott, can you clarity your problem?

      Randy

    • profile image

      Scott bramhall 

      2 months ago

      Air will shut off braker. 2 min will on

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      2 months ago from Southern Georgia

      Misty, if the coils are clean, then you may have a low Freon charge.

      Randy

    • profile image

      Misty 

      2 months ago

      My AC blows good an is cool but not as cold as I think it should be.

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      2 months ago from Southern Georgia

      Dave, it's either a thermostat or control board issue. Check the stat first before replacing the control board.

      Randy

    • profile image

      Dave 

      2 months ago

      My roof top a/c unit comes on when I plug into shore power even though the thermostat is turned off. Why is this happening

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      2 months ago from Southern Georgia

      Jeremy, may be a weak capacitor causing this to happen. Easy to replace and cheap in most cases.

      Randy

    • profile image

      Jeremy 

      2 months ago

      I have an older carrier roof top model.i turn it on it runs good and cold for a while then it bogs down then quits any help would be appreciated

    • profile image

      Daniel 

      3 months ago

      Thanks randy! Will give it a try this weekend.

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 months ago from Southern Georgia

      Daniel, this is usually a sign of dirty coils. When they get clogged--especially the one behind the filter--the fan cannot disperse the moisture into the air as it normally does and it leaks down into the camper.

      Get a couple of cans of no-rinse spray coil cleaner from Lowe's, Home Depot, ACE Hardware, or Amazon if you prefer. Follow the directions and you should be fine.

      Randy

    • profile image

      Daniel 

      3 months ago

      I have a park model camper at the beach in NC and just noticed that the AC unit is leaking into the camper and actually all around the filter. Only happens when the AC unit is running, but leaked so much it created a little bit of a bulge on the ceiling right behind the unit. Could it be freezing up? Any thoughts?

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 months ago from Southern Georgia

      Janie, probably a bad compressor capacitor. About $25 or so and easy to replace. Any local AC or electric motor service can check it for you and furnish a replacement if necessary.

      Randy

    • profile image

      Janie 

      3 months ago

      Our camper is set up permanently. Son got up today and fan is running but not cooling. Please help, we don’t know anything about these air conditioners, also it is one on top

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 months ago from Southern Georgia

      Larry, yes you should be able to swap them out as the holes are the same size.

      Randy

    • profile image

      Larry Cordell 

      3 months ago

      I have a 2015 Prowler with a Dometic ac unit (second one that I have put on the camper) they're not cooling the camper down. I have a 2007 Keystone with a Dometic duo therm that cools down really good could this one be put on the Prowler instead of the Dometic that is there?

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 months ago from Southern Georgia

      Natasha, if the new cap doesn't help, then you may need to clean the coils thoroughly. Dirty coils can inhibit an AC's performance.

      Randy

    • profile image

      Natasha L Berry 

      3 months ago

      Keystone Loredo "04" our AC will run and keep it cool if the temp outside is 90 degrees and below but it will be only somewhat cool while my daughters camper beside us is freezing. If the temp outside gets higher than 90 (and its been 95-100+ degrees all summer thus far) The AC seems to either not work or pump warm air into the trailer. My husband is going to camping world today to purchase a capacitor and I wanted to know if this sounds like it maybe the capacitor failing? At the same time, I have noticed after talking with other campers that our electric bill is much much higher than other people, so I could conclude that it is using a lot of amps as stated in conversation below and I'm not sure if that's because it's not working at its best so we have to leave it on all day? Thanks, Natasha

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 months ago from Southern Georgia

      Brent, the compressor may be going bad if it's drawing more amperage than listed on the unit. The only way to check this is by borrowing or renting a clamp on amp meter and check for yourself.

      Randy

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 months ago from Southern Georgia

      Kris, more than likely a bad capacitor. About $25 and easy to replace.

      Randy

    • profile image

      Brent 

      3 months ago

      2002 Duo Therm Quick Cool model 15K ducted RV rooftop air unit recently started some noticeable vibration on low, very much vibration on high. Still cools, but other day vibration has lessened a little on low, but now RV cord getting WAY too hot when a/c ran maybe 45 minutes.... drawing too much amperage apparently. No nests or debris seen inside shroud or unit. Thoughts?

    • profile image

      Kris 

      3 months ago

      Just got a 2007 Roo 23SS. The a/c worked fine and cooled down great. Today we turn it on and nothing happens. We can hear it click when turning on the thermostat but nothing runs. Suggestions. We are new to this as we previously had a pop up with no air. Thanks.

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 months ago from Southern Georgia

      Terry, change out the compressor capacitor first. Easy to replace and around $25 or so.

      Randy

    • profile image

      Terry R Boone 

      3 months ago

      Camper Ac started blowing hot air. Now will not run. Set on cool fan will run but compressor will not kick in. Suggestions?

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 months ago from Southern Georgia

      Mark, what do you mean by end play? Distance from the coil?

      Randy

    • profile image

      Mark 

      3 months ago

      How much end play should you have on the fan motor shaft?

    • profile image

      NanaSueYobo 

      3 months ago

      Thank you Randy ... Will check it out there

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 months ago from Southern Georgia

      Nana, I don't have an error chart for your AC. You'll need to go to the maker and download the owner's manual if you don't have one. Sorry!

      Randy

    • profile image

      NanaSueYobo 

      3 months ago

      What is an E4 reading on my a/c panel ? A/C is off and I dont knoow what this means

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 months ago from Southern Georgia

      Matt, unless the fan motor is bad a new cap will usually solve this problem.

      Randy

    • profile image

      Matt klaver 

      3 months ago

      My cometic ac units blower won’t start unless you spin the squirrel cage. I’ve already changed the capacitor and added a booster but no luck. The camper is only 2 years old. Unfortunately it’s out of warranty.

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 months ago from Southern Georgia

      Nicole, there are several things which may be the problem. I suggest you clean the coils and check the capacitors first.

      Randy

    • profile image

      Nicole 

      3 months ago

      1993 Starcraft leisure Star 30ck

      Hello i have this trailer listed above but my trailer ac on the roof top isnt working well he does get cold inside but only a little what might be the cause

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 months ago from Southern Georgia

      Thanks Patrick, I usually ask if the coils are clean as well when a reader says the compressor is overheating and switching off. I am a bot leery of telling a reader to use water to cool off the compressor though.

      Randy

    • profile image

      Patrick Hollingshead 

      3 months ago

      The dude who wrote this article seems very knowledgeable. Im an a/c tech with universal epa certification and i am NATE certified and everything he wrote seems spot on. One thing i noticed that he didnt address, in the summer when used almost 20 hours a day sometimes, the compressors can get over heated. The compressors have a temperature safety switch located in them on the tops of them, if you notice your a/c turn on but quieter and everything else checks out if u LIGHTLY touch the top of the compressor and its blazing hot, this switch could be keeping it from turning on. If this is the case keep the breaker turned off and let it cool. If just left to cool off by simply keeping it off "meaning breaker off, very important" it will take a very long time. To speed up the process, with the breaker off and shroud off use a water hose to cool it by continuously keep a stream of water flowing on top of the compressor untill it is completely cool to the touch all over it. Don't just cool off untill it kicks back on, its better to let it completely cool down this will prevent damage to it.

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 months ago from Southern Georgia

      Joshua, the type Freon used should be listed on the unit somewhere. If not, look online for the maker of the unit and there should be info about the Freon type.

      Randy

    • profile image

      Joshua 

      3 months ago

      I have a 1998 28 ft 5th wheel trailer. What type of freon is in theroof top ac?

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 months ago from Southern Georgia

      Robert, probably a bad capacitor. Around $25 or so and easy to change out.

      Randy

    • profile image

      Robert OBrien 

      3 months ago

      Sir, i have a 2018 Coachmen freedom express. AC has been working great. Today it seemed much quieter than normal and is not blowing cold air the way it has been. It is set correctly. Not sure where to look.

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 months ago from Southern Georgia

      Russell, unless you have a vacuum pump and the proper gauges it'd be better to let a professional do it. You'll need to find the source of the leak as well.

      Randy

    • profile image

      Russell C Elrod 

      3 months ago

      ya im thinking low freon cause after the freezup that started all this i cleaned them pretty good with a shop vac with a brush head on it and didn't bend any fins and its pulling air through and its not icing up what would i need to add freon to a system like these its a duo therm model 59516.331 1500 nom btu roof ac and the inside coils riight now at 6:30 am set at 70 don't even feel cold to the touch ina arm even so it must be the freon

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 months ago from Southern Georgia

      Russell, if you haven't cleaned the inside coil behind the filter, try using so no-rinse spray coil cleaner on it. If this coil is very dirty it could make the coil freeze up. Otherwise, this issue may be a low Freon charge.

      Randy

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 months ago from Southern Georgia

      Art, more than likely it's the thermostat or the control board.

      Randy

    • profile image

      Russell C Elrod 

      3 months ago

      Hi Randy i have a duo therm 13000 btu rooftop ac and about a month ago i had turned the ac downtoo far and the coil froze up bad i then turned off the ac but left the fan on and it started leaking water into the rv from the coil through the air intake where the filter is in the roof which the control board box is right there im not sure if it got wet inside the box i turned the breakers off for the ac and waited till it stopped dripping water got a hair dryer and opened the access pannel for the control board and it did not seem to have gotten any water in iso i turned the breakers back on and turned the unit on and it seemed to run fine but when i turned the thermasat heat /off/cool to off the fans stopped but you could feel the compressor was still running and would no go off unless i turned the breakers off so i replaced the thermastat with a new one and that seemed to fix the problem but i used to have hi/low fan now only high seems to work when i switch it to low fan it stops blowing are now here is the real problem now at night the ac will freeze you out if you set it low but i live in Fresno Ca and its getting up 90-107 but when it starts getting hot it stops cooling exceptevery now and then you hear the compressor kick on the lights dim for a sec which its always done but the air blowing out is not really cool then seems to just get hot but like i said at night iand mornings t will still cool very good will get you shivering if you turn it down so what can this be causing it to stop blowing cool air once the temp gets up over 85 + it becomes an oven in here i have congestive heart failure but did clime up and try to clean the outside coils and it didnt really help but it was working fine before this it would keep it real cool in here when 110 outside so im stumped could it be heating up with heart problems i have not been up to clean the roof off like i would every 6 months and now its all covered with dust bad everything brown not white like i used to keep it but we had alot of shade from trees but for it to be working fine till it froze up now does this since but changing the thermostat stopped the compressor from not shutting off i and the fact it will freeze us out at night and morning please help i can check the control board but will pay someone to do anything on the roof and let me say this everyone please get your flu shots that is what caused my heart problems i got that flu 2 years ago that killed so many and it almost killed me im 51 now with only 30% use of my heart now thanks

    • profile image

      Art martinez 

      3 months ago

      I have a 1985 starcraft the ac unit blows cool air,not cold air n the termostat does not change setting the ac unit runs all the time

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 months ago from Southern Georgia

      Beth, I don't have a schematic. Look online for the maker of your AC. You'll need the model and serial number to find the wiring diagram.

      Randy

    • profile image

      Beth 

      3 months ago

      My wires got pulled out of my ac and I need to know how to put the wires back in

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      3 months ago from Southern Georgia

      Troy, probably a weak capacitor. Easy to replace and around $25 or so.

      Randy

    • profile image

      Troy Ridley 

      3 months ago

      When i turn the air on the motor runs for a bit then the compressor kicks in like it should. Only runs for about 30 seconds the the compressor kicks out for about a minute or 2. Then kicks back in. Dose this repetitive. Sometimes after about 2 hours it starts working properly. Sometimes it doesn't. Any ideas.

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      4 months ago from Southern Georgia

      Jeffrey, yes the ports are notorious for leaking. I don't know what capacity the system requires but it can be recharged.

      Randy

    • profile image

      Jeffrey Gregory 

      4 months ago

      I have a Coleman Mach series rooftop unit that has lost cooling efficiency (slowly). It has a service port installed so my guess is that it has or had a slow leak. About how many pounds of refrigerant does one of these units take. I will also make sure the condensor and evap fins are clean.

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      4 months ago from Southern Georgia

      Eric, this is usually a control board or thermostat issue. Check the stat first before replacing the control board.

      Randy

    • profile image

      Eric 

      4 months ago

      My ac blows cold but fan only runs on full speed

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      4 months ago from Southern Georgia

      Ron, if the coils are clean, then you may have a bad capacitor. Dirty coils can prevent the compressor from cooling properly. Using some no-rinse spray coil cleaner will stop this issue. Otherwise check and/or replace the capacitors.

      Randy

    • profile image

      Ron Thompson 

      4 months ago

      I bought 2012 Milan eclipse 24lsbh . Dometic 13500btu started popping breaker at about 90+ outside upgraded breaker to 20amp. Same problem. Now have new 15000 dometic. Worked great until outside temps reached 100. I m now going down bad connection route. Breakers is good have no.12 wires. Not familiar w rv. Any ideas?

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      4 months ago from Southern Georgia

      Sheila, have the capacitors checked first. Any AC or electric motor repair can test and replace them for you.

      Randy

    • Randy Godwin profile imageAUTHOR

      Randy Godwin 

      4 months ago from Southern Georgia

      Can-RV, sounds like a bad fan motor. You may be able to oil it up and get by for awhile, but a new motor will eventually be needed.

      Randy

    • profile image

      Sheila 

      4 months ago

      We have a 2018 Wildwood by Forest River, and the ac comes on and works fine for a couple hours, then it starts cutting off and right back on.. Can you help me??

    working

    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, axleaddict.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: https://axleaddict.com/privacy-policy#gdpr

    Show Details
    Necessary
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
    Features
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Marketing
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Statistics
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)
    ClickscoThis is a data management platform studying reader behavior (Privacy Policy)