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

Updated on November 21, 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.

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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.

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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.

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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.

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    • Randy Godwin profile image
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      Randy Godwin 24 hours ago from Southern Georgia

      Dallas, the fan speed is regulated by the thermostat and the control board. That is, unless the fan is old enough to have worn windings.

      Randy

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      Dallas 24 hours ago

      Randy, thanks for your quick response. I will remove the shroud and see if I can learn anything. While I have it removed is there anything I can look for that will allow me to adjust the fan speed settings so that I will have 3 speeds instead of one?

    • Randy Godwin profile image
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      Randy Godwin 27 hours ago from Southern Georgia

      Jenny, you can see the compressor bouncing around if the rubber shock absorbers are worn or missing. It won't be hard to see if the unit is running. Good luck!

      Randy

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      Jenny 28 hours ago

      How would you be able to check to see if the compressor shocks are worn out?

      Thank you again !

    • Randy Godwin profile image
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      Randy Godwin 28 hours ago from Southern Georgia

      Jenny, it may be one of the fans is out of balance. You have a blade fan and a squirrelcage fan. It's common for mud daubers to build nests on both during the time between camping trips.

      You'll have to remove the shroud to see if this is the case or if the compressor shocks are worn out.

      Randy

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      Jenny 29 hours ago

      We have a 2006 trailcruiser 26ft camper. It has a duotherm air conditioner. 57915.541

      It turns on / is cool but it shakes the whole camper.

      Any advice what it could be?

      Thank you.

    • Randy Godwin profile image
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      Randy Godwin 30 hours ago from Southern Georgia

      Mike, sounds like you have a bad start/run capacitor. Easy to replace and around 25 bucks for the capacitor.

      Randy

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      Mike 30 hours ago

      When I turn my fan on it works great but when I switch to air it humes for a minute before kicking the air on

    • Randy Godwin profile image
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      Randy Godwin 33 hours ago from Southern Georgia

      Dallas, have you looked underneath the shroud to see what is causing the noise? A bit more info may help.

      Randy

      Ra

    • Randy Godwin profile image
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      Randy Godwin 33 hours ago from Southern Georgia

      Queeber, more than likely the wiring for the AC has been disconnected while the heater was repaired. Whoever did the repair work is the one to contact.

      Randy

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      Dallas 34 hours ago

      I have an new Dometic roof ac that was just installed. The fan settings are all the same. There are no differences as I am familiar with. It seems to have three high noisy setting. Can this be easily repaired? I am on the road on a schedule. I cannot find a service center that will work me in.

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      Queeber1 34 hours ago

      Hello,I have a 2014 Park Model w/ a 15K duct fed ac unit that stopped working after the heater had to be removed and repaired.After it's reinstalation the ac does not work, we have been trying to find a company to fix the warranteed ac unit and can't find anyone..HELP Please

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      Diana73 2 days ago

      Thank you Randy. I will check it out.

    • Randy Godwin profile image
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      Randy Godwin 2 days ago from Southern Georgia

      Diana, this issue may be due to a bad capacitor. A cheap and easy fix most of the time.

      Randy

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      Diana73 2 days ago

      I have a 2000 Aerolite camper we just bought. The guy said the a/c worked fine. He had it out near the road and no way to to plug it in to test it. We took him at his word (I know, dumb) and tried it the other day on a breaker we have that is 30amp and could handle the load. When you turn in on it gets cold pretty quick but shortly it stops cooling and then shuts off. I work on cars a/c but not home or campers

    • Randy Godwin profile image
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      Randy Godwin 3 days ago from Southern Georgia

      Brad, I can't guarantee you there would be no damage if you tried swapping them, but if it were me, I'd take the chance. But that's just me. :)

      Good luck and let know what you find out, Brad.

      Randy

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      Brad 3 days ago

      Thanks Randy, could swapping control boards for testing potentially damage the one that is good if something else is wrong with the back AC unit?

    • Randy Godwin profile image
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      Randy Godwin 3 days ago from Southern Georgia

      Brad, this may be a control board problem if each unit has a separate control board.

      Randy

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      Brad 3 days ago

      Hello Randy, Hoping you can help. Zone 2 AC/heat pump (back unit) doesn't show up on thermostat (All Duo-Therm, 2005), I tried swapping zone 1 & 2 dip switch settings, reset the thermostat (hold Mode and Zone while powering on) and then can only see zone 2 (front AC unit), back unit should then be zone 1 and it doesn't show. Last time I used it in heat pump mode and it got quite cold outside--will that damage it? I took thermostat apart, cleaned everything with contact cleaner--no change. Initially zone 2 (back unit) would show up on thermostat for about 15 seconds and then disappear. Couldn't get it back unless I power cycled the thermostat, then same thing with disappearing in 15 seconds. I was going to try switching boards and see if the problem reverses but not sure I can get all the crazy connections right even if I take pictures--complicated little sucker!

    • Randy Godwin profile image
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      Randy Godwin 4 days ago from Southern Georgia

      Carrie, try cleaning the coils with a good no-rinse coil cleaner found on Amazon or at an ACE Hardware store. Over time the coils get clogged with dust the filter doesn't collect and will cause the excess condensation to leak down through the vent.

      Randy

    • Randy Godwin profile image
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      Randy Godwin 4 days ago from Southern Georgia

      Danny, sorry I don't have any info on resetting the stat. If you can't find it online, try contacting the company.

      Randy

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      Carrie johnston 4 days ago

      For some reason the rooftop airconditiner unit is leaking from the vent. The unit sits directly above the vent or where it's leaking water from.

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      Danny pate 4 days ago

      Whiterogers analog thermostat anticipator settings. How can I adjust?

    • Randy Godwin profile image
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      Randy Godwin 4 days ago from Southern Georgia

      j.tires, have you checked the thermostat yet? Are you sure the power stop at the control panel? May be a control board issue.

      Randy

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      j.tires@att.net 4 days ago

      power to control panel not to upper unit

    • Randy Godwin profile image
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      Randy Godwin 5 days ago from Southern Georgia

      Michele, first replace or check the capacitors. If this doesn't help, then the compressor may be bad. You'll need to either borrow or rent a clamp-on amp meter to see if the compressor is pulling more amperage than is listed on the compressor.

      Randy

    • Michele Reid profile image

      Kenneth Coons 5 days ago from Marysville, CA

      My Fan/A/C/Furnace is on one breaker, with a wall thermostat to control it. My fan will come on and run with no problem. But when I turn the A/C on it trips the breaker within a minute or two. I can't afford a repair man so I would love to fix it myself if possible...HELP...smile

    • Randy Godwin profile image
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      Randy Godwin 5 days ago from Southern Georgia

      Earl, if you can borrow or rent an amp meter you can check the amperage the compressor is drawing. If it draws much more than 12. 4 amps, the compressor is bad.

      Randy

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      Earl Sheppard 5 days ago

      Duo therm model number630035.331 . It has heat pump

      Compressor says 12.4

      The fan works but when I turn on AC it blows warm air and spikes the electrical charge whether I'm plugged into electricity or using generator.

    • Randy Godwin profile image
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      Randy Godwin 6 days ago from Southern Georgia

      Connie, if you have a wall mount thermostat you need to check it first. Otherwise, the control board may be at fault.

      Randy

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      Connie Colvin 6 days ago

      My roof top Coleman mach continues to come on when in off position what could be the issue?

    • Randy Godwin profile image
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      Randy Godwin 7 days ago from Southern Georgia

      Dennis, this sounds like a control board issue, but check the thermostat first as it may be bad as well.

      Randy

    • Randy Godwin profile image
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      Randy Godwin 7 days ago from Southern Georgia

      Debbie, I'd have the capacitors checked first. If that doesn't solve the problem, let me know and we'll go from there.

      Randy

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      Dennis 7 days ago

      AC unit Coleman Mach. 2 years old. starts up fine. When it shuts off, it hums.. Sounds like compressor is still on. Even on the thermostat in the off position, it stays on. Go to turn the ac on again.. It wont. Have to turn breaker off to stop the humming. Any thoughts?

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      Debbie J Garner 7 days ago

      We have a keystone Laredo.. plugged it in directly..it threw the breaker about 7 times.. I moved the plug into its own breaker.. plugged it in it worked fine for about 2 days and now the air conditioner will turn on for about a minute the compressor does not kick in and then all of a sudden it just shuts down.. I don't know what to do with it now????

    • Randy Godwin profile image
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      Randy Godwin 7 days ago from Southern Georgia

      Ernie, so glad I could help you in repairing your AC. Thanks for reading! :)

      Randy

    • Randy Godwin profile image
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      Randy Godwin 7 days ago from Southern Georgia

      Phil, does your camper have a climate control?

      Randy

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      Ernie Stille 7 days ago

      after replacing the start and run condensers on my colman roof top unit i went a head and purchased a new 2 speed motor and required condenser for about $120 installed and BAM i have AC now and the unit is blowing at high speed ! thank you Randy for sending me in the direction to fix it my self.

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      Phil 7 days ago

      Where is the. Ac Coleman control panel on an 2014 American eagle. There is 3 units and the middle unit blows hot air.

    • Randy Godwin profile image
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      Randy Godwin 7 days ago from Southern Georgia

      Carl it may be the motor as you've covered all of the other bases it seems.

      Randy

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      Carl 8 days ago

      I have installed a new computer board in my front roof mounted ac unit. I have an older model allegro bus. I have replaced all of the cap's. I have installed the new 5 button thermostat also.My unit is blowing pretty good but not great cold air. Catch is after it has run for 4 1/2 mins the fan stops running. [ fan motor turns real easy by hand ] The compressor keeps on running after the fan stops. I turn off the unit so as not to harm the compressor. Just after the fan stops I can switch to Fan Only and after about 8 mins the fan will start on it's own. Is the fan motor going bad even if it is running ok till it stops again ? Carl

    • Randy Godwin profile image
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      Randy Godwin 8 days ago from Southern Georgia

      Susan, check the capacitors first.

      Randy

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      Susan 8 days ago

      My account on my 2000 Georgie boy cruse Master front ac unit just stopped running. I have √ the fuse and breaker. The thermostat still runs the furnace. Please Help.

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      Lou Steinritz 9 days ago

      Thank you Randy!

    • Randy Godwin profile image
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      Randy Godwin 9 days ago from Southern Georgia

      Lou, this may be the capacitor and I'd try checking and or replacing it first. Otherwise, the windings in the fan motor may be worn. Let me know what you find out if you can. :)

      Randy

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      Lou Steinritz 9 days ago

      This weekend the front ducted Carrier AC unit fan stopped working all together in my 2009 Monaco Class A. Removed the shroud, used AC foam cleaner, and got it cleaned up.

      The problem is, the fan to the squirrel wheel will rotate freely as long as there is NOT any power to it. Turn the unit on, and you can barely turn the fan blades and/or motor shaft. It sounds like the compressor is charging up, and hums, but motor won't start. Is this likely the capacitor?

    • Randy Godwin profile image
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      Randy Godwin 9 days ago from Southern Georgia

      Matt, this appears to be either a thermostat or control board problem. Start by checking the thermostat.

      Randy

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      Matt 9 days ago

      When I turn on the furnace the overhead fan comes on and when the A/C is running the fan never shuts off even when the compressor shuts on and off.

    • Randy Godwin profile image
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      Randy Godwin 10 days ago from Southern Georgia

      Kristi, more than likely the overhead ducts have collapsed--or a spot has collapsed-- causing a blockage in the system. You might try using some sort of rod to see if you can open the ducts back up.

      Randy

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      Kristi 10 days ago

      My ac runs from the ceiling mount but not out of any vents in the ceiling

    • Randy Godwin profile image
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      Randy Godwin 10 days ago from Southern Georgia

      Jackie, changing the capacitor for the compressor--or simply checking it--should be your first step in finding the problem.

      Randy

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      Jackie Martin 10 days ago

      Fan works, can hear compressor for a few seconds and then shuts off. Air continues to blow just not cold air. Do you think it is the compasitor on compressor?

    • Randy Godwin profile image
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      Randy Godwin 11 days ago from Southern Georgia

      Terry, try cleaning the coils with a good no-rinse coil cleaner Both the condenser and the evaporator coils can clog with dust and debris over the years and cause the compressor to overheat and trip the breaker.

      Randy

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      terry picking 11 days ago

      I have a 1978 coachman drive typ camper roof airconditioner runs 20 min cold air then flips breaker after I let it cool down I can repeat whats wrong with it

    • Randy Godwin profile image
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      Randy Godwin 11 days ago from Southern Georgia

      Joy, try cleaning the coils with a no-rinse coil cleaner found on Amazon or at a local ACE Hardware store. If you haven't cleaned the coils before,it's due anyway for a good cleaning.

      Randy

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      Joy Morrow 11 days ago

      I've got a 2005 Crossroads 5th wheel. The AC works fine until after it's run for a while. Then it makes a loud buzzing whine. I turn it off and if I turn it right back on, it makes the noise right away but if I let it sit for 30 minutes it doesn't buzz. It's been doing it for about six years. It seems like it's freezing up but if it was leaking, wouldn't it be out of freon by now? Also I have to leave the AC on when I leave the rig because we travel with pets but them I'm always scared that it will freeze up while I'm gone and fail and cook the pets or cause a fire, either one. Thoughts on what could be causing the problem and what I can do? I don't really have the money to replace the unit.

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      AnnW74 12 days ago

      Thank you

    • Randy Godwin profile image
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      Randy Godwin 12 days ago from Southern Georgia

      Ann, you can order from Amazon if you can't find one locally. Check the electric motor repair shops, as well as any local AC repair services available.

      Randy

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      AnnW74 12 days ago

      Any idea where I can get a capacitor? My local dealer says they don’t make Emerson units anymore and can’t get parts either.

    • Randy Godwin profile image
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      Randy Godwin 12 days ago from Southern Georgia

      Tommy, more than likely the winding in the fan motor is worn since the unit is 16 years old. And you're correct about the caps I think.

      Randy

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      Tommy 12 days ago

      My Dad's 2002 Prowler ac eill run on low but the fan motor only hums on high or fan only. Any thoughts on what may be the problem. I was thinking capacitor but if it only has one then it probably wouldn't run on low.

    • Randy Godwin profile image
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      Randy Godwin 12 days ago from Southern Georgia

      Kneel, check the capacitor(s) first. A weak cap can cause this problem. Easy to replace and inexpensive as a rule.

      Randy

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      Kneel 12 days ago

      Hi, we just purchased a Big Horn with a Dometic AC. Occasionally the entire thing shuts down for a split second, then starts right back up.

      Thanks. Neal

      Sorry about the double post.

    • Randy Godwin profile image
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      Randy Godwin 13 days ago from Southern Georgia

      Peggy, when this happens either the AC drain is clogged, or in most cases with newer ACs, the coils are extremely clogged. If your camper has a drain, you can easily remove the shroud and clear the clog.

      If it doesn't have a drain, then you can clean the coils--an evaporator coil and a condenser coi--wit some no-rinse coil cleaner from Amazon or you may find some at an ACE Hardware store.

      You may to clean them more than once if they're really clogged. Hope this solves the problem.

      Randyl

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      Peggy 13 days ago

      Our ac is cooling fine, but it is dripping a lot of water inside. We have a 2008 Aspen travel trailer. We are In the Texas heat and have bucket in the middle of our camper. How do we fix this?

    • Randy Godwin profile image
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      Randy Godwin 13 days ago from Southern Georgia

      Tom, this may be a thermostat or control board problem. I'd check the thermostat first if it's wall mount. Apparently the caps are good so the control board may be the problem.

      Randy

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      Tom 13 days ago

      I woke up one morning in a sweat as morning lows did not get below 80 (I am in Texas). The AC just had a little hum. Flicked the breaker, discharged the charge in the capacitor, rebooked it, switched the breaker back on, and it tarted. But problem reoccurred. I replaced capacitor, and it happened again and again. Last night when it shut down, I just flicked the breaker off nd on, and it started. Ran all night. I am ready to pull the trigger on a new unit, but this unit is only two years old and seems fine. What else could be going on? Appreciate all who participate here.

      Thank You!

    • Randy Godwin profile image
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      Randy Godwin 2 weeks ago from Southern Georgia

      Try checking the capacitors, Alyssa. A weak cap can cause this problem.

      Randy

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      Alyssa 2 weeks ago

      My breaker keeps tripping. We've cleaned the coils, replaced the air filter as well as the breaker. It worked for about a week & now it's tripping again. idk what else to do

    • Randy Godwin profile image
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      Randy Godwin 2 weeks ago from Southern Georgia

      Ann, Check the caps first as some repair guys simply want to sell you a new unit. Good luck!

      Randy

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      AnnW74 2 weeks ago

      Thank you, the mobile repair guy I called said it would probably be a unit replacement at just under $1,000 including labor...

    • Randy Godwin profile image
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      Randy Godwin 2 weeks ago from Southern Georgia

      Ann, this sounds like a bad fan capacitor. An easy to replace and inexpensive part. Around 20 bucks or so in most cases.

      Randy

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      AnnW74 2 weeks ago

      My Emerson Quiet Kool overhead unit hums when I turn the fan on, after a few minutes it will kick in and blow. The compressor works and cools fine once the fan comes on, but just this morning the fan seemed like it slowed down then shut off even though I hadn’t done anything to the unit. Any ideas?

    • Randy Godwin profile image
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      Randy Godwin 2 weeks ago from Southern Georgia

      Jackie, check the fan capacitor.

      Randy

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      Jackie s 2 weeks ago

      Unit just hums when u turn it on

    • Randy Godwin profile image
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      Randy Godwin 2 weeks ago from Southern Georgia

      Diane, have the capacitors checked as this sounds like a bad capacitor leaking.

      Randy

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      Diane 2 weeks ago

      My Quick Cool AC on my 5th wheel smells like fumes when I turn it on. Hot air blows out. I don't leave it on long enough to see if the air gets cooler because I have several dogs. Is this a repair or replacement issue? What is causing the problem?

    • Randy Godwin profile image
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      Randy Godwin 2 weeks ago from Southern Georgia

      ZJASON, this depends on the set-up particular to you camper. Some systems have fans which stop when the correct temp is reached and others do not.

      Randy

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      ZJASON 2 weeks ago

      So we recently purchased a 2 bedroom destination trailer with 3 units on 3 thermostats. The front and the rear units fans do not shut off when the t-stat reaches temp, however the compressor does.Is this normal for multi unit set ups?

    • Randy Godwin profile image
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      Randy Godwin 3 weeks ago from Southern Georgia

      Iteater, if all of the units are on the same thermostat, then you may have a control board problem in this unit. I assume it's under warranty?

      Randy

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      teater 3 weeks ago

      why does my air blow cold for 6 minutes then begins to blow hot air,new cyclone 44 ft,2 other units run great,domectic units,6 months old,

    • Randy Godwin profile image
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      Randy Godwin 4 weeks ago from Southern Georgia

      Scott, there may be one or two capacitors in your AC. If there are two, then you have one each to start and run the fan and compressor.

      Randy

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      Scott 4 weeks ago

      Which two capacitors run what things on a coleman camper a/c unit?

    • Randy Godwin profile image
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      Randy Godwin 4 weeks ago from Southern Georgia

      Guffy, this may be a thermostat problem causing the compressor to cycle frequently.

      Randy

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      Guffylynn5 4 weeks ago

      Hey Randy,

      I have a 99 Fleetwood lite and

      The a.c. is making a humming noise on off constant! It blows real cold air as well! What could be making this noise?

    • Randy Godwin profile image
      Author

      Randy Godwin 4 weeks ago from Southern Georgia

      Robin, if the coils are clean then yes, a low Freon charge will make the coil behind the filter to ice up afte running awhile. It will eventually stop cooling at all when the rest of the Freon escapes.

      Yes, you can have the unit recharged if you can find and stop the leak.

      Randy

    • profile image

      Robin33 4 weeks ago

      Hi Randy,

      We have a Coleman Mach A/C unit on our pop up camper. It will run a couple of hours with cold air, then it seems like it freezes up. The fan will still run but the air flow is minimal. Would anything other than low Freon be the issue? If it is low, can it be charged? Thank you.

    • Randy Godwin profile image
      Author

      Randy Godwin 4 weeks ago from Southern Georgia

      Depends on the unit, Dan. It seems it would be a bit cooler though.

      Randy

    • profile image

      Dan N. 4 weeks ago

      any ideas on what the air temp should be coming out. Cleaned my and it around 48-52 degrees, at the unit. about 52 at the farthest point.

    • Randy Godwin profile image
      Author

      Randy Godwin 5 weeks ago from Southern Georgia

      Andy, check the thermostat first, but this may be a control board issue as well. Is the unit performing normally when running?

      Randy

    • profile image

      Andy 5 weeks ago

      I have a 2016 domitec ac rooftop it will run for 5 minutes then shuts off compressor and fan turn ac off wait 7seconds and it runs and then shuts off again

    • Randy Godwin profile image
      Author

      Randy Godwin 5 weeks ago from Southern Georgia

      Jocelyn, if you have two caps they may be different in values. And no, remove a screw or two and simply plug the wires from the old cap into the new. Make sure you mark which wire goes where.

      Randy

    • Randy Godwin profile image
      Author

      Randy Godwin 5 weeks ago from Southern Georgia

      Scott, it may need cleaning if you haven't cleaned the coils before. This may also be a low Freon charge if it's running constantly. Check Amazon for a replacement as they're usually reasonable and will sometimes ship free. It isn't a difficult job to replace an AC unit and I have an article here to show you how. Good luck!

      Randy

    • Randy Godwin profile image
      Author

      Randy Godwin 5 weeks ago from Southern Georgia

      Bill, this is either a thermostat or control board problem. Check or replace the thermostat first before replacing the control board.

      Randy

    • profile image

      Jocelyn 5 weeks ago

      Randy,

      would both capacitors be the same, for fan and compressor, are they easy to change?

      Thanks

    • profile image

      Jocelyn 5 weeks ago

      Randy,

      would both capacitors be the same, for fan and compressor, are they easy to change?

      Thanks

    • profile image

      Scott 5 weeks ago

      Hi Randy,

      Thank you for the information post. I have a 2014 wolf pack toy hauler. This year the AC blows just not very cold. It runs non stop. I will be checking under the shroud after work today to see if it needs cleaning. I called a couple of here in Cincinnati about a replacement... Was told $800-$1000. That sounded high to me. It does condensate visually there is water draining from the gutter. Could it be something simple??

    • profile image

      BillB61 5 weeks ago

      Hi,

      I was running my AC unit this weekend in the AUTO position. When the camper reached temp the fan kicked off but I could still here the condenser unit running. I switched the thermostat to the OFF position and the condenser continued to run. I had to flip breaker to get it to stop running. When I flipped the breaker back on the condenser unit started to run again even with the thermostat in the OFF position.

      Any ideas?

    • Randy Godwin profile image
      Author

      Randy Godwin 5 weeks ago from Southern Georgia

      Alexia, most of the time when this happens the coils are extremely clogged with debris accumulated during several years of use.

      Go to Ace Hardware or Amazon and get a can--or two- of aerosol no rinse coil cleaner and follow directions. Let me know if this doesn't work.

      Randy

    • profile image

      Alexia 5 weeks ago

      Hi Randy, I have a Pioneer 2001, the ac worked great, until yesterday, it started to run the air thru the central ac, and it was throwing the water inside the rv.

      Thanks

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