CarsCampers & MotorhomesAuto Buying & SellingAuto RepairTrucks, SUVs, & VansMotorcycles & ScootersAll-Terrain VehiclesSafe DrivingCommercial VehiclesAutomotive Industry

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

Updated on May 20, 2017
Randy Godwin profile image

Randy is a lifelong lover of the outdoors and especially camping. This article is 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 in 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.

Comments

    0 of 8192 characters used
    Post Comment

    • Randy Godwin profile image
      Author

      Randy Godwin 46 hours ago from Southern Georgia

      Jolenna, the area where the AC pulls in air is normally covered by the filter. Have the capacitors checked and replace if necessary. Around $20 apiece to replace them or you may have only one which operates both fan and compressor.

      Randy

    • profile image

      Jolenna 2 days ago

      My ac just stopped turning on. The sides with the grates on it, is that where the air sucks threw or blows?

    • profile image

      Daniella 3 days ago

      Thank you, Randy...I'll have them checked!

    • Randy Godwin profile image
      Author

      Randy Godwin 4 days ago from Southern Georgia

      Daniella, I'd have the capacitors checked and replaced if they show being weak or bad first of all. It may be necessary to remove the shroud to see what's causing the "clunking" sound if replacing the caps doesn't solve the problem.

      Randy

    • profile image

      Daniella 4 days ago

      I have a Starcraft pop up with a rooftop a/c. It works well, never has had any problems until today. When I first turned it on, you could hear it humming, but nothing was happening in both fan and cooling modes, I turned it off and tried again and it worked. Got it home, opened it up and same thing. It makes a clunking sound when it does come all the way on. Any ideas?

    • Randy Godwin profile image
      Author

      Randy Godwin 12 days ago from Southern Georgia

      Mandy, more than likely a bad thermostat.

      Randy

    • profile image

      Mandy 13 days ago

      My ac unit will run and keep the camper cool but it won't ever shut off. Any ideas what the problem could be?

    • Randy Godwin profile image
      Author

      Randy Godwin 2 weeks ago from Southern Georgia

      Ron, replacing a rooftop AC is an easy job in most cases. Simply a matter of getting the old unit off and putting the new unit on top and connecting a few wires. You should have no problems doing the job yourself.

      Randy

    • profile image

      Ron Lankford 2 weeks ago

      I have a 2000 National Surf Side that has a bad ac unit I am thinking of replacing it myself...have excellent mechanical background... it's a Coleman unit ...don't know model what are things to look for doing this myself vs a repair shop

    • Randy Godwin profile image
      Author

      Randy Godwin 3 weeks ago from Southern Georgia

      Eric, sounds like you've covered all the bases trying to find the problem. The only thing I can think of is perhaps removing the furnace affected the thermostat in some manner. Did the same thermostat operate both furnace and AC?

      Randy

    • profile image

      Eric Ingle 3 weeks ago

      We have a 2005 28' dutchmen lite RV. We purchased used from an individual not knowing much about RV's. So after a lot of remodeling & repairs it's perfect for us. With the exception of the AC click. The unit is a dometic duo-therm 13,500 btu. We completely removed the furnace, it doesn't trip any breakers, just makes clicking noise then sounds like it's sluggish. Then it's going again. We have cleaned the coils & squirrel cage, replaced hard start capacitor & running capacitor. Tried changing out thermostat but not sure about the wiring. It keeps it cool, just not able to sleep good with the clicking & not knowing what it is doing. Any suggestions

    • Randy Godwin profile image
      Author

      Randy Godwin 3 weeks ago from Southern Georgia

      Michael, the filter coil is where the air is going through the AC.

      Randy

    • profile image

      Michael 3 weeks ago

      Should the air moving through the condenser coils blow out of the unit or be sucker into it I have a carrier 15000 but remote controlled unit

    • Randy Godwin profile image
      Author

      Randy Godwin 3 weeks ago from Southern Georgia

      Hi Maegan, you'll need to remove the shroud from the AC to see what is causing the noise. It could be bad compressor shock absorbers which keep the compressor from shaking the entire unit. They are small rubber cushions which do wear out over time. Another possibility is bad fan bearings or an unbalanced fan. An unbalanced fan can be caused by a blade breaking off or even by a mud dauber nest being built on the fan itself. I've observed the latter on a few occasions and the former several times. Feel free to ask for more info if needed.

      Randy

    • profile image

      Maegan 3 weeks ago

      Hey Randy. I have an Advent roof top air conditioner. Well it was running just fine then all of a sudden it started making this HORRIBLE roaring noise and shaking the whole camper. I turned it off and tried it again and the same noise and shaking happened. It still turns on just makes a noise so loud and shakes so bad you can’t leave it on. What could be the cause?

    • Randy Godwin profile image
      Author

      Randy Godwin 3 weeks ago from Southern Georgia

      Sarah, thanks for the good words re my article. As for the limited airflow from the ducts, a good cleaning of the coils may help somewhat but often overhead ducts will collapse after a time. Try removing the vent covers to see if this is indeed the case, and if so, try using some sort of flexible pole or stick and see if you can open the ducts a bit wider by running the stick/pole inside the ducts.

      Randy

    • profile image

      sarah 3 weeks ago

      This is very helpful info. Thank you for sharing. I have a roof top ac/heating unit on my 30' coachmen. I have recently purchased this camper. I plan to do basic service as outlined above as I am sure the unit has never been cleaned. At any rate, the bunk area does not seem to cool very well. I have noticed very limited air flow out of the ceiling ducts throughout the camper. Any suggestions at to what could be the problem? Thanks!

    • Randy Godwin profile image
      Author

      Randy Godwin 3 weeks ago from Southern Georgia

      John, check the capacitors first of all, and if this doesn't help get back to me.

      Randy

    • profile image

      John 3 weeks ago

      My ac and heat stopped working, the fans run but no heat or cool.

    • Randy Godwin profile image
      Author

      Randy Godwin 3 weeks ago from Southern Georgia

      Stacy, check the capacitor(s). An easy and relatively easy replacement.

      Randy

    • profile image

      Stacy 3 weeks ago

      Aç was working fine before a storm hit.. Now it doesn't seem to cool as good. Any suggestions?

    • Randy Godwin profile image
      Author

      Randy Godwin 3 weeks ago from Southern Georgia

      Bob, it depends on the thermostat setting.

      Randy

    • profile image

      Bob decatur 4 weeks ago

      What should the air temp be coming out of the a c

    • Randy Godwin profile image
      Author

      Randy Godwin 4 weeks ago from Southern Georgia

      Gabriel, do you have a generator to supply power to the AC when it's not connected to shore power?

      Randy

    • profile image

      Gabriel Flores 4 weeks ago

      Hey Randy needing some help, when the unit is plugged up to 110v runs and works great, as soon as we unplug the unit it stops working, doesn't run even when the RV is on or driving, any ideas

    • Randy Godwin profile image
      Author

      Randy Godwin 6 weeks ago from Southern Georgia

      Janet, is the AC operating off of the engine or are you using a the generator?

    • profile image

      janet 6 weeks ago

      when we go down the road and the air condition is on in the middle of the coach and the front control on the dash is off there is hot air coming out of the vents on the floor

    • Randy Godwin profile image
      Author

      Randy Godwin 6 weeks ago from Southern Georgia

      Diana/Joe, not if you have someone who knows how to install a piercing valve on the low pressure side of the system and can pull a vacuum before adding more Freon. You'll probably need to use a leak checking dye to see where the former Freon charge escaped.

      Randy

    • profile image

      Cca410 6 weeks ago

      Randy, yeah we keep it turned down all the way. Can't get the compressor to run as often as we do while the suns out. It stays fairly cool but not as much as we like because it seems as the thermostat just needs an extra notch to keep the compressor running a little longer to get a little cooler. I only notice this while is cooler outside, when it's blazing hot outside it will run almost be cold in the room. I have 2 newer campers and both of these smaller units are bedroom units and they both do this.

    • profile image

      Diana/Joe 6 weeks ago

      Does recharging the Freon on a sealed unit require to be done professionally? And if so do know approx reasonable fee?

      PS Camping at the moment and from bed can hear ice hitting the floor.

    • Randy Godwin profile image
      Author

      Randy Godwin 6 weeks ago from Southern Georgia

      Diana/Joe, It does indeed sound as if the Freon charge is getting low in your AC. Normally icing is caused by the thermostat being turned to low or dirty coils contributing to the icing. But when an AC gets low on Freon it will get really cold--ergo the icing--just before the Freon runs out. Your unit can be recharged if all the other components are still working well.

      Randy

    • Randy Godwin profile image
      Author

      Randy Godwin 6 weeks ago from Southern Georgia

      Cca410, I'm not sure about the outside temp sensor being the problem as the inside temp should control the thermostat function. Have you tried turning the temp setting down at night and does this allow the compressor to run longer?

      Randy

    • profile image

      Cca410 6 weeks ago

      I have 2 newer Coleman 13.5 btu units with knob control. Once the outside temp cools off it keeps the compressor from kicking on as often. During the day when the sun is out they're perfect, on a cool night we sweat in here because the compressor won't kick on. This happens on 2 different units with the same type of ac. Was told it was outside temp sensor keeping them from coming on. Do you know if this is true and how to override this?

    • profile image

      Diana/Joe 6 weeks ago

      Hey Randy,

      We have basically the same issues as Ana posted below regarding recharging. The routine checks have been done, the coils are clean, but as the day gets hotter, the unit cannot cool our camper. And now we are having problems with the unit icing up. We afraid we are going to be looking at replacing the unit, and our travel trailer is only 3 years old.

    • Randy Godwin profile image
      Author

      Randy Godwin 6 weeks ago from Southern Georgia

      The low pressure tube should be larger than the high pressure, Michael.

      Randy

    • profile image

      Michael Simmons 6 weeks ago

      Which is the high pressure, and low pressure tubes on a Coleman mach roof ac?

    • Randy Godwin profile image
      Author

      Randy Godwin 6 weeks ago from Southern Georgia

      If the thermostat is good then the control board may be at fault. The thermostat sends the signals to the control board for the compressor to turn on and off.

      Randy

    • profile image

      Marty Schindler 6 weeks ago

      My Dometic AC compressor stays on when fan shuts down. Has new thermostat.

    • Randy Godwin profile image
      Author

      Randy Godwin 7 weeks ago from Southern Georgia

      Bruce, check the capacitors first. They are cheap--around $20--and easy to replace. Any electric motor repair business can check them or you can do it yourself if you're electronic savvy and have a digital multimeter.

      Randy

    • profile image

      Bruce H Peters 7 weeks ago

      I have a 1984 Ford F 350 26foot motorhome when I turn on the air conditioner it runs for a little bit and then automatic turns itself off can you give me any help to what I might be looking for

    • Randy Godwin profile image
      Author

      Randy Godwin 7 weeks ago from Southern Georgia

      Ana, yes these units can be recharged under certain conditions. Are you sure the coils don't need cleaning?

      Randy

    • profile image

      Ana Miller 7 weeks ago

      Can these units be re charged with freno or are they sealed units

      Ours is cooling mildly in the AM but towards the heat of the day it blows foolish air and won't shut off until nightime

    • Randy Godwin profile image
      Author

      Randy Godwin 7 weeks ago from Southern Georgia

      Andrew, the cap is a small battery looking item with two or more terminals on it. If you're not sure you can look on Amazon for AC capacitors to see what they look like. you may have a capacitor each for the fan and compressor or sometimes only one which start/run both. Check the cap with the power to the AC off, being careful not to touch the terminals with your bare skin.

      Randy

    • profile image

      Andrew bruno 7 weeks ago

      Awesome, thanks Randy! And where exactly is the cap located? I'm guessing it's accesses via the roof, I've already got the shroud off but not seeing it. Is it in a box of some sort? Mounted to the Freon tank? Where exactly should I look? And test it with ac on in cool mode correct?

    • Randy Godwin profile image
      Author

      Randy Godwin 7 weeks ago from Southern Georgia

      Hey Andrew, this sounds like a bad capacitor. You can check it putting your meter on OHMS and placing the probes on the terminals. If the cap is good you will get a random number which decreases in value the longer you touch the terminals. If you get a steady or no number the cap is bad. A cheap replacement in most cases.

      Randy

    • profile image

      Andrew bruno 7 weeks ago

      Randy-

      I have two Dometic 15. 5 BTU AC units in my country coach. Odly enough the old one in the front which gets the most use works great but the new one that was replaced a year ago in the bedroom is only kicking on the fan no different in cool mode then in fan. Is it safe to say the thermostat is not the problem since it is still controlling the front unit just fine? Is there anyway to bypass the capacitor using a battery or hot wiring it somehow to try and get the compressor to kick on that's rolling out a bad compressor? I have an voltage meter where would I check to make sure the proper signal or voltage is coming through would that be on the thermostat side or at the AC unit itself and which wires? Thank you so much in advance for your time, I appreciate good ole boys like you lending a hand, cheers!

    • Randy Godwin profile image
      Author

      Randy Godwin 7 weeks ago from Southern Georgia

      Mike, I suggest you consult with the thermostat maker as I have no wiring diagrams to compare your to. There should be a website to assist you with the problem. Sorry I cannot help you.

      Randy

    • profile image

      Mike 7 weeks ago

      I have not. I have a new thermostat installed (Honeywell programable, that takes 2 Aaa batteries, unless it's hooked up wrong, I have the two red and whit wires for heat,

      Then the wires for the AC unit I have a black, brown, green, and white wire.

      The wires on the control board to the thermostat is

      Black to Y

      Brown to GL

      Green to GH

      White to B

      On the thermostat it's

      Black to Y

      Brown to G

      Green to O

      And White to B

      Then then two for the heat that works fine.

    • Randy Godwin profile image
      Author

      Randy Godwin 7 weeks ago from Southern Georgia

      More than likely the thermostat isn't sending the correct signal to the control board, Mike. Have you checked the voltage at the thermostat?

      Randy

    • profile image

      Mike 7 weeks ago

      I just got a brand new AC unit, new Thermostat, but not a new ceiling assembly, my old unit, the compressor would not kick on, and I am having the same issue with this new one with the compressor not kicking on. The fan comes on on both, but nothing else, not ever a surge that would signal the compressor trying to start up. What would be the best thing to do to get my New AC unit to work as it should? I have 124v going to the AC unit so it's not a power supply issue.

    • Randy Godwin profile image
      Author

      Randy Godwin 7 weeks ago from Southern Georgia

      Renee, if the unit is 12 yrs old then it is due for a good cleaning of the coils. Dirty coils can make the compressor overheat and shut down for awhile. Get some good no-rinse spray coil cleaner and see if this helps. You can find it at ACE Hardware or from Amazon.

      Randy

    • profile image

      Renee' 7 weeks ago

      my A/C is ~12 yrs old. It doesn't cool as well as it used to. We are in a hot spell, and it has started turning itself off like it has reached the requested temperature, even though it is 10-15 degrees above the requested temperature. Voltage is fine. Air from vent is cool. Any ideas?

    • Randy Godwin profile image
      Author

      Randy Godwin 7 weeks ago from Southern Georgia

      Leigh, any rooftop AC will work as they all fit the same size roof opening. I usually recommend Amazon for obtaining a new AC as they have a good return policy.

      Randy

    • Randy Godwin profile image
      Author

      Randy Godwin 7 weeks ago from Southern Georgia

      Moufx, I'd replace the two caps as they are relatively cheap and see if this solves the problem.

      Randy

    • profile image

      Leigh 7 weeks ago

      Hello, I have a 1989 Avion basement model. One of the two air conditioner units runs then just stops. The other just makes noise. I know I probably need to replace both units. My question is where and what size to get? I am new to this as you can tell,I plan on living in this rv for at least a year. Any help would be greatly appreciated.

      Thank you!

    • profile image

      Moufx 7 weeks ago

      I got the thing running really good today and then it did the same thing as before. I did pull the panel to look at the capacitor and noticed I have 3 capacitors they all look like they have seen better days. The compressor kicks in with no problem so I am assuming that capacitor is good. Now the other to look pretty bad. So should I just replace all of them or just the other two and if one goes to compressor and one goes to motor what would the third one goto?

    • Randy Godwin profile image
      Author

      Randy Godwin 7 weeks ago from Southern Georgia

      Moufx, try replacing the capacitor first and if this doesn't solve the problem then a new fan motor may be in your future.

      Randy

    • Randy Godwin profile image
      Author

      Randy Godwin 7 weeks ago from Southern Georgia

      pterrip, it's normal for some older AC units to drain atop the roof but newer models disperse the moisture into the air. If the coils are very dirty the moisture will tend to leak down inside the camper. Cleaning the coils may solve your problem.

      Randy

    • Randy Godwin profile image
      Author

      Randy Godwin 7 weeks ago from Southern Georgia

      Brian, try cleaning rhe coils with a god no-rinse spray coil cleaner. Dirty coils can inhibit airflow and cause the moisture to remain inside the AC unit and drip down inside.

      Randy

    • Randy Godwin profile image
      Author

      Randy Godwin 7 weeks ago from Southern Georgia

      Robert, more than likely the repairperson disconnect the 12 volt from the thermostat and it also affected the other items you mentioned. They all run on the 12 volt system.

      Randy

    • Randy Godwin profile image
      Author

      Randy Godwin 7 weeks ago from Southern Georgia

      Mike, there should be a tag with the type of Freon used somewhere on the unit.

      Randy

    • profile image

      Mike 7 weeks ago

      My ac just started to pop the breaker after a few hours doe it use the same freon as is used in cars I think it may be low on freon because when I just run the fan it stays cold for a few minutes?

    • profile image

      Brian Brownell 7 weeks ago

      I have a 2007 24 ft Fleetwood Pioneer travel trailer I just purchased. I can let the AC run for 30 minutes and it runs great. After 30 min it starts icing up but still cold air is coming out of vents but at very low air pressure. The grill on the ceiling has a slow drip of water and condensation all around it. The grill is also blowing out cold air. I thought it was supposed to suck in air. I have changed the capacitor and cleaned the drain lines because it would drain for a while then stop. Can someone please help me out?

    • pterripterodactyl profile image

      pterripterodactyl 7 weeks ago from Northern California

      Could you please clarify: if I'm running the A/C for much of the day, is ANY water running off the roof--at all--normal? Or should it all be dispersed into the atmosphere? I'm in northern California, and the humidity is pretty low (20-30%, in the summer). I'm getting a gallon or two of water running down the side of my '97 travel trailer, and there's been leakage into the ceiling, I'm sure (crispy-crackly paneling around the interior A/C trim). Going to try to clean those coils or fins, as soon as it's not 105 degrees and blazing sun, but need to know whether any condensation running off the roof is normal or not. Thank you!!

    • profile image

      Moufx 7 weeks ago

      I have a Coleman Ac unit on my coachman. When I first got the rv a few weeks ago the Ac would half ass work I could manual spin the fan and it would kick on then in few min of run time it would like seaze up i turn the Ac of and fan would spin free with no issues but turn it on and it's all tight and won't hardly spin even with help I can hear the compressor kick on so could it be bad motor or should I change start run cap?

    • Randy Godwin profile image
      Author

      Randy Godwin 7 weeks ago from Southern Georgia

      Mike , do you have one or two capacitors in your AC?

      Randy

    • Randy Godwin profile image
      Author

      Randy Godwin 8 weeks ago from Southern Georgia

      Frank, have the compressor capacitor checked first of all, and have you cleaned the coils yet? If it's cooling fine before tripping the breaker then the Freon level is more than likely fine. Dirty coils can cause the compressor to overheat and trip the breaker, and a bad start/run capacitor will do the same.

      Randy

    • Randy Godwin profile image
      Author

      Randy Godwin 8 weeks ago from Southern Georgia

      T9carlson, no I don't have an article about repairing the floor beneath a slide-out as I haven't ever repaired this section of flooring. Perhaps in the future...

      Randy

    • profile image

      Frank 8 weeks ago

      I have an rpv 7000 and it runs for about 5 minutes then pops the breaker. Is it possible that it is low on freon or should I start looking for something else?

    • profile image

      T9carlson2 8 weeks ago

      Do you have a section about replacing the floor under the slide ? The slide itself is good but The floor on the outer edge is bending downward

    • Randy Godwin profile image
      Author

      Randy Godwin 8 weeks ago from Southern Georgia

      Tom, if you're going to trade in a few months then I'd go for the new motor. You do realize you may be able to get a universal replacement fan motor from Amazon a bit cheaper?

      Randy

    • profile image

      Tom 8 weeks ago

      I've got an older Coleman ac unit on my camper the blower motor started squealing this morning and vibrating I've found a new motor for it about 200 with tax ... I'm trying to decide if I should replace the motor or spend a little more and buy a new ac unit ? Any advice ? I'm planning on buying a new camper in a few months so I don't want to dump a bunch of money in this one .

    • Randy Godwin profile image
      Author

      Randy Godwin 8 weeks ago from Southern Georgia

      Russell, check the capacitor as it's probably bad. A new one will run you around $20 or so and is easy to change out.

      Randy

    • Randy Godwin profile image
      Author

      Randy Godwin 8 weeks ago from Southern Georgia

      Larry, you should have received a wiring diagram with the unit and the thermostat. I don't have one. Sorry!

      Randy

    • profile image

      russell 8 weeks ago

      i have a 2005 fleetwood orbit travel trailer. pluged into a 30 amp service at camp ground a/c worked fine shut it off and now i cant get it to come back on. any idea why?

    • profile image

      Larry 8 weeks ago

      put in new RV Dometic air conditioner everything is in but don't have the wires hook up need help going from contraol box to a new Domestic digital thermostat

    • Randy Godwin profile image
      Author

      Randy Godwin 8 weeks ago from Southern Georgia

      remmi, have you tried cleaning the coils yet? When the coils are very dirty it can cause the compressor to get hot and not recycle properly. Try some no-rinse spray coil cleaner and see if this helps.

      Randy

    • profile image

      remmi1021 8 weeks ago

      i have a 1999 Catalina travel trailer. my a/c trips the 20 amp breaker. I have changed the 30/20 amp breaker and the thermostat (because it wouldn't cycle through (shut on and off)). even after all of this it still trips. It mainly does it at night or late afternoon. It will run for a while then it trips. I believe it wants to cycle through, but it wont just turn off and back on. Any suggestions on what to do or how to fix this?

    • Randy Godwin profile image
      Author

      Randy Godwin 8 weeks ago from Southern Georgia

      Phillip, you'll need to remove the shroud to find the problem. Are you sure the sound you heard was the fan? It may have been the compressor running instead. If so, the fan motor capacitor may be bad. Not an expensive or difficult task at all. Let me know what you find or if I can further assist you.

      Randy

    • profile image

      Phillip glendenning 8 weeks ago

      Today I just got done cleaning my AC when I turned it on about two hours later there was no cool air coming out no air at all the fan was blowing sounded like but no air was blowing what could be the problem I think it might have froze up but I'm not sure any ideas

    • Randy Godwin profile image
      Author

      Randy Godwin 8 weeks ago from Southern Georgia

      Charlie, is this a new AC? Even if it is, I'd check the compressor capacitor first. Can you tell if the compressor is running when it stops blowing cool?

      Randy

    • profile image

      Charlie Clark 8 weeks ago

      Randy I'm new to the RV life as we just bought our first 3 1/2 months ago. But this last trip the ac seemed to stop blowing cool air in the hottest part of the day . Turn it off for an hour or so and it starts cooling again . Please give me some direction at where to start

    • Randy Godwin profile image
      Author

      Randy Godwin 2 months ago from Southern Georgia

      Gary, yes it's possible even a new AC could have a bad capacitor. Are you running the camper using an extension cord or from a low amp breaker?

      Randy

    • profile image

      Gary turner 2 months ago

      Just installed new domestic brisk air. It throws a breaker @ each attempt to start. My Q is?? Would a campacitor cause this?? It is wired correct

    • Randy Godwin profile image
      Author

      Randy Godwin 2 months ago from Southern Georgia

      Donald, sounds like a capacitor problem. You may have a single capacitor controlling both fan and compressor. At any rate, I'd check the capacitors before doing anything else. They are relatively cheap and easy to change out.

      Randy

    • profile image

      Donald 2 months ago

      When turning on our Coleman Mach maxAir, the fan runs but as soon as you put the dial on low cool, the fan slows down then stops to just a hum. Turn it off for a bit and try again, the exact same thing. Compressor issues I guess ?

    • Randy Godwin profile image
      Author

      Randy Godwin 2 months ago from Southern Georgia

      Jessica, when the coils are dirty the moisture will collect and drain onto the roof and down into the camper through the filter area. Cleaning the coils will allow the fan to disperse the moisture into the air.

      Randy

    • profile image

      Jes sica 2 months ago

      Is it suppose to be dripping water off of the roof? And this amount of water coming into the RV is substantial enough to drench a towel over night, does an A.C. unit usually produce this much water?

    • Randy Godwin profile image
      Author

      Randy Godwin 2 months ago from Southern Georgia

      Jes, is the roof leaking or is the moisture coming from the AC? If from the AC you need to purchase some no-rinse spray coil cleaner as your coils are probably clogged with dirt and debris. This will cause the moisture to gather on the roof instead of being dispersed into the air.

      Randy

    • profile image

      Jes sica 2 months ago

      We have a Dometic A.C. unit, we recently have noticed the airflow is reducing more and more (down to 2 cieling vents blowing air instead of the 12 that are availible). And we have noticed our floor inside the rv is getting soaked when ever the A.C. is on but only in the area the water coming off the roof is in. there is still water coming off of the roof but also seeping into our walls for some reason. Can we fix this our selves? Or would you recommend a professional? Thanks so much

    • Randy Godwin profile image
      Author

      Randy Godwin 2 months ago from Southern Georgia

      Kenneth, is the compressor coming on? You may have a bad compressor capacitor if not.

      Randy

    • profile image

      Kenneth j. Bower 2 months ago

      I have a 2010 cameo. I hooked to 110 amp to cool RV prior to trip. Air did not cool. I assume this is due to low amp. Is this correct? Thanks Ken.

      L

    • Randy Godwin profile image
      Author

      Randy Godwin 2 months ago from Southern Georgia

      Brenda, you need to remove the shroud to get a better look at the cause of the noise. Did the WD40m help at all?

    • profile image

      Brenda 2 months ago

      High pitch squeling every now and again..sometimes it builds up so we just shut it off..we have cleaned it..and sprayed WD40 on the fan axel part...bit didn't take off the the top and look inside

    • Randy Godwin profile image
      Author

      Randy Godwin 2 months ago from Southern Georgia

      Gary, do you have a wall mounted thermostat? If so it may be defective. Other than that the control board may be at fault as it is responsible for controlling the fan. Does the thermostat work on the fan only option?

      Randy

    • profile image

      Gary Barnes 2 months ago

      My compressor works great cools super but the fan never stops after the compressor kicks outs. what should I look for.

    • Randy Godwin profile image
      Author

      Randy Godwin 2 months ago from Southern Georgia

      Mikhayl, this has to be a compressor problem as there's nothing else could cause such a violent reaction. Are you using a generator to power the AC? If so, your capacitors may be weak. I'd love to know what you find.

      Randy

    • Randy Godwin profile image
      Author

      Randy Godwin 2 months ago from Southern Georgia

      Sandy, Dometic ACs are usually very good, but you obviously have a lemon. What else can you tell me about your unit? Is the compressor working well, or what is the problem otherwise? A bit more info may assist me in helping you with the problem.

      Randy

    • profile image

      Sandy 2 months ago

      We bought a Dometic AC several years ago and has not worked well at all since purchase. We installed it ourselves, had it running but has never cooled much a all. Any ideas?

      Thank you