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Under trailer self contained park model air conditioner runs on auto for several hours coming on and off as required than for no reason trips the breaker? If fan set to on position instead of auto runs continuously but does not trip breaker, gets to cold. Why?

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Posted on Jan 02, 2017

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Possible low voltage condition would cause that kind of a problem. To small a cord without the ability to carry and maintain the voltage would cause a voltage drop. I would test the voltage supply and make sure it is within 10% of that required for your A/C to operate properly.

Posted on Jun 16, 2008

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SOURCE: air conditioner will trip breaker when trying to cycle back on

The compressor motor , once warm is grounding out due to wear and is going bad.Have the compressor replace while it is still clean is cheeper and easier that doing it after a burn out,which  will eventually happen,if the compressor is tripping the brreaker as I suspect..

Posted on May 10, 2009

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SOURCE: dometic rv air conditioner over 100 deg. trips breaker.

The problem is that when u add up the electrical draw from all of these appliances running full bore, your draw exceeds your available amperage. Now you are doing the math and saying no...... Let me tell you why. It is rare to find a situation where a 100 amp service actually porovides 100 amps. You almost always have voltage dropo. And when you are adding extension cords to the mix the drop is even more. That said, When you are using the AC try to minimize the use of other appliances, especially the microwave which is a big draw too.

Posted on Jun 25, 2009

  • 100 Answers

SOURCE: circuit breaker tripping from the air conditioner

moter or compresser pulling to many amps on start up you can purchase a hard start kit and also you can ohm out blower moter you could also have a direct short althoug not likly

Posted on Aug 09, 2009

  • 266 Answers

SOURCE: travel trailer roof top ac keeps tripping 20 amp

If it tripps quickly you have a direct short which means a hot wire is going to ground. This can be caused by a wire that has melted and grounded, compressor burnt out, fan motor failure, capacitor shorted, or just one of the wires running from the above to each other. First try the unit with it just running the fan.. if it does not blw the breaker then turn it to a/c . If it blows the breaker on fan you have a wire probably shorted inside the selector/fan panel open it up and look for melted or burnt ends repair the wires if found wires slowly degrade and that creates heat which causes the wire to degrade more until something melts. If it only tripps when you put it on a/c then you need to ck the panel and then go on top and take the cover off look for damaged wires ect there is an access after you take the cover off to get at more wiring. Look for a capacitor it will be a silver or grey cannister with writing on it that says 5uf or 35uf and 200 to 500volts if it is 3 wire it will be the start capacitor for the fan and the compressor if not then you should have two capacitors on 5uf and one 35uf make sure the wires look good if bad replace wires and try the unit if not you will need to purchase a volt/ohm meter at a hardware store get a cheap 10 to 15 dollar one it will come with instructions or just ask the salesman. Then you will need to unhook the wires from the capacitor. 3 wire put ohm meter on ohms and place the wires from the center connection to the outside connection one side will be for the fan and one for the compressor. When you place the black on the center and the red on the outside connection and then reverse hold them for a few seconds the meter will drop and build up to 5 or 35uf then do the other side. The center connection is the same for both sides. If you have one or two two wire capacitors you ck them the same way just put your ohm meter leads on and them switch and see if it builds up try a couple times. If they ck bad replace it. If not then your fan motor or compressor are bad. Remember th capacitors store voltage and are hot even when the power is off you can short them by using a screw driver blade do not touch with your hand. You can check he compressor by grounding one of your ohm meter leads on the compressor scratch a silver spot for goodconnection then touch each of the 3 connections on the compressor if any of them show 0 ohms or close its shorted out. Always unhook power before handling the unit or testing for ohms. hope this helps

Posted on Aug 08, 2010

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How do i fix my central air conditioner from tripping the circuit breaker?

tripping circuit breakers indicate shorts in the system or overload from a compressor failure
call in a technician to properly diagnose the problem and get a quote

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I have a 2010 30' cougar travel trailer, we have never used the air conditioner which is a coleman mach model, when I put it on auto and cool it blows cool air but never gets cold am I suposed to

Check the temperature of the air coming out the vent If it's more than 10 degrees below the air going in it's ok. If it's the same temperature, the condensing system may be not working. The compressor may just be a quiet one!

May 18, 2012 | Coleman Mach III Air Conditioner

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Are trailer is only a couple of years old and we have only used it a few times - twice when we have used it we left the air conditioning running and left the trailer for a few hours and come back and it is...


Here is what happening . This has nothing to do with you having it on while you stepped out for a few hours. The unit needs to be cleaned/ filters/screens/fins/coils. This problem would of happened even if you were in the trailer as it was running. The issue is after a while, sense it needs to be cleaned it loads up and then starts to freeze and then once it starts to freeze coils etc... it then starts only blowing warm air. When you turned it off, and let it set for a while, reason it started working again, is because the ice that built up defrosted some to have unit operate proper again. Solution is to clean the unit good. Thanks Mike from fixya.

Jul 31, 2011 | Dometic Rooftop RV Air Conditioner

1 Answer

Ac fan will not run on high setting , manual or auto . when unit calls for high setting fan shuts down . Compressor continues to run and trips breaker in trailer . Someone thinks it may be the motor, but...

Most probably its weak motor.When the motor gets weak it trips/ stops on high setting.On high setting motor needs more power to run the fan.Try lubricate the motor .You may need a few drops of oil on the fan motor bearings. As they get older they get dry and gunked up. If you can see the bearings a few drops of oil may help. --------- Because the fan operates on medium and high, so loose wire or faulty fan switch is very rare to cause this problem.-------- As per the problem , it requires motor to be replaced.--------- This will help.Thanks.Helpmech.

Jul 29, 2011 | Dometic Rooftop RV Air Conditioner

1 Answer

I need a second roof top air conditioner in my fifth wheel But there is no vent in bedroom Is it still possible to have one installed

Anything is possible, just depends on how much bother and expense you want to go through. If you check with your manufacturer and give them a make and model number, they can check blueprints and advise if the framing for another vent is already there, just not cut out or used. Then there is the problem of getting hydro up to it and thermostat wires if you decide to go with a thermostat instead of just turning it on at the ceiling assembly. We have done custom installations before even if not framed in by simply framing it in ourselves at a good location. The hydro cable to it may require removing some panels and re-installing them after but that can also be done fairly easy, just takes time and labor. The other thing to consider is if your trailer only has 30 amp service, or park only provides 30 amp service, then you may have to install an alternate (extra) panel to power it, reason being that if you only have 30 amps, and run 2 air conditioners, your almost at your limit and main breaker will be tripping quite often, such as when fridge cuts in, microwave is used etc, if both are on. If unit was designed to run on one, I question why the second is necessary. Perhaps if you give me some details on what you have for an RV , Year, and model and model number of AC unit, we can see if there may be another problem that is causing it not to cool sufficiently.

Jul 05, 2011 | Dometic Rooftop RV Air Conditioner

1 Answer

I have recently replaced the fan motor on my Briskair roof top A/C unit, should the squirrel cage draw air from inside the trailer and blow out rear of the unit, or have I installed this fan incorrectly?

Yes the air should be drawn from the trailer, over the cold coils and then
back into the trailer, whether rear or front.
The condenser coils should be self contained on top and blow
warm air outside the trailer

If this was helpful please rate me.
Leo Ponder Appliance-Tyler,Texas

Aug 26, 2010 | Dometic Rooftop RV Air Conditioner

2 Answers

My unit was working fine until 3 days ago when the breaker tripped, I reset the breaker and worked fine for a day then tripped again when it tripped both the ac breaker andthe main in the trailer as well...

High amp draw can be caused by a few different things, so first check that incoming voltage to trailer is sufficient. (115 volts) Not unusual for some parks to install more hydro hook-ups on a feed line, and when all are up and running, your incoming voltage could be decreased. If your o.k. that way, then I'd start looking at the compressor circuit of your ac, in particular, the compressor start-up capacitor. The capacitor basically stores electricity and boosts it to higher voltage for compressor and fan start-ups to reduce current draw that will trip the breaker. Please have a knowledgeable electrician, or RV tech check this for you, as a capacitor can give a real good high voltage (possible fatal) shock, even when power is off to unit. I also suspect that the start relay has shorted (welded) itself due to high amp draw situation, and that is reason it comes on by itself.

Jun 21, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

Outside unit will not run. Its happened before and I pushed the high pressure switch and it came on. Now that doesnt work

Usually when the high pressure switch trips its because the outdoor coil is dirty or the outdoor fan isn't running or not at full speed.
A lot of times when it cycles on high pressure the compressor gets hot and trips the thermal overload in the compressor and depending on the outside temperature can take several hours to come back on.

Jan 09, 2010 | Ruud UBHC Air Conditioner

1 Answer

I'm told that the self-contained compressor is gone. They claim 8-14 hours to replace this for labor. Is this realistic? is access? proper compressor change out done properly 4-5 hours that includes recovering freon if it is an identical compressor and does not require reconfiguring the piping under 5 hours a good service tec will figure out what made the compressor go bad their is a cause and affect should be able to figure out within an hour. if you don't find out you'll be replacing it again. but 14 hours thats just crazy. Tom

Jun 30, 2009 | Intertherm P3RA-036K Air Conditioner

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