Question about Dometic Rooftop RV Air Conditioner

1 Answer

Ac circuit board

My thermostate is off and the compressor stays running. And the fan is off, I have to shut the breaker off to turn the compressor off

Posted by Anonymous on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Dometic Master
  • 1,363 Answers

Relay board issue.

Posted on Aug 18, 2015

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad
22yooper
  • 828 Answers

SOURCE: Compressor starts and doesn't stop

Relay for the compressor may be stuck ( Contacts welded) both the fan and the compressor should operate at the same time. Have the relay(s) checked and possibly replaced.

Posted on May 31, 2008

  • 2 Answers

SOURCE: 579 series, 13.5K BTU Rooftop trips AC circuit breaker in hot weather...

Is your condensing unit located in a well ventilated area and have an ample space, atleast a foot, from the rooftop flooring? Just make a check that free flowing outside air properly ventilates the condensing unit specially on high ambient temperatures. Hope this would solve your problem

Posted on Sep 16, 2008

  • 659 Answers

SOURCE: Duo Therm compressor tries to start and kicks out

I don't think these little units have a start capacitor but what I would do is check that the on/off switch wires to make sure they aren't loose. Also check the wires to the compressor for loose wires as well. It is possible that these are the first signs that the compressor is about to fail. They also can act up some when they haven't been used for awhile and then you try and start them up. Try running the unit for a few hours without asking it to cycle. It might just be a sticky valve.

Posted on Apr 13, 2009

  • 2692 Answers

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

tooltech75
  • 80 Answers

SOURCE: Compressor will not shut off.

could be a thermostat problem

Posted on Oct 02, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

LG LW2416HR window AC / heat unit problem. Compressor will not shut off or cycle. It runs all of the time. Please see below for details.


Has to be a stuck relay or contactor. I'm sure it's a relay on a circuit board so likely the whole board will need replaced. Never opened one up and don't see a wire diagram. But, if you need heating, unhook the compressor. Obviously wrap any bare wires, obviously cooling works but will have to turn off breaker to shut down. Temporary fixes obviously but will get you by. Best wishes!

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

Aug 15, 2017 | LG Heating & Cooling

1 Answer

I have a issue with my 2 Dometic DuoTherm air conditioners. The rv is a 2014 Palamuno Saber 50 amp fifthwheel. Ok. They cool very well but at different random times the compressor shuts off while the fan...


how long a power cord do you have and what size conductors are in it. when a a/c shuts down do to thermostat reaching its setting then trys to start back up shortly the pressures dont have time to equalize resulting in high amp draw. if fans runs all the time instead of shutting off with compresser it will call for cooling fast. i have a 2003 cardinal with 2 a/c's the smaller one has a continous fan & the larger one cycles fan with compressor. i have power cord rated for 50 amps. 110 to 115 is still a low vooltage condition.

Feb 21, 2015 | Dometic Heating & Cooling

1 Answer

Duo Therm A/C (2009 Sabre RV) won't shut off


bad compressor relay on control board. The relay is not opening the circuit, allowing the compressor to stay running when unit is turned off. This overheats the compressor and opens a thermal disk shutting the compressor off. When thermal disk cools down, the compressor restarts under load and trips breaker.

Jun 06, 2013 | Dometic Rooftop RV Air Conditioner

1 Answer

With the thermostate off the interior fan runs but when i turn the thermostat on it trips the breaker


Not good! The thermostat only supplies power to the compressor section, so a breaker tripping is a sign of a 'dead' short to that area. If lucky, it just an exposed wire or terminal connection damaged in that area, but rarely the cause. More likely is compressor mtr "locked rotor", or stuck "potential" start relay holding the mtr circuit in hi-amp load, or shorted internal motor winding's. The condensor fan can also short closed, but is rare due to it's design. I have to assume the electic breaker suppling that circuit is not failing, as cause?

Jul 09, 2010 | True TD-95-38-LT Beverage Cooler

1 Answer

Ac unit wont start


Sounds like a classic case of a burnt/pitted compressor contactor. The contacts can get pitted and sometimes burnt. This can cause them to stick and the unit will not shut off unless you shut off the circuit breaker. When you shut off the circuit breaker, the contacts would have cooled down which could have led to the problem you are now experiencing......will not come on. Open up the electrical box. Look near the bottom for a brown or black part with the wires from your circuit breaker wired directly to it. This is your contactor. In the center is the piece that moves up and down to allow the electricity to go to your compressor and fan motor when there is a call for cooling. Check to see if it looks burnt or otherwise damaged.

Apr 04, 2010 | Carrier 38CKC048 Air Conditioner

1 Answer

Dometic AC that the fan shuts off but the compressor keeps running


call dometic dealer. I hear they have a bad circuit board that is replaced.

Jun 02, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Fan will not shut off, but compressor does


hi! there, continous fan motor when unit was shutt off,since supply source was already cut off specially on fan condenser motor,the supply of your motor was came from relay mounted on your circuit board control panel,there a holding coil to hold the connection between your fan and ac source,shut off breaker for ac unit first before diagnosing ac unit, try to check this out the relay is still activated giving ac source when shut off,the contactor on relay holding your ac supply was shorted,try to check the connection the circuit activating condenser fan relay,eliminate the short circuit,using multi tester test rod,use manual diagram for circuit control board to lessen complicated diagnosing,focus on fan relay ac source then isolate checking the short circuit replace defective relay,contact point of relay are not repairable.take necessary precaution on checking to avoid shock,this a hard task i would suggest that certified ac technician w/ full knowledge of instrumentation should do this.thank's for selecting fixya and have a nice day.

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

3 Answers

2002 Chevrolet Impala overheating while idling


the thermostates on the 3400 engines are late because the fans kick in at the last moment. if you run your ac on you will notice that the gauge stays in front of the half mark or right on the half mark. that is because when you turn on your ac your fans will kick in earlier and stay on the whole time the ac is on. if you run your car with the heat on or nothing on that leaves the late thermostate to kick in verus you turning on your ac and it by passes the thermostates and runs the fans once the engine gets at at lest 120 deg. i use to have a 2002 and i had the same problem. this will keep your engine cooler. also if you don't want your air on just turn on your windshield defrosters (not the back windshield) and that helps keep your engine cool because your defrosters use your air compressor which is really your ac. so it still kicks the fans on earlier.

Dec 11, 2008 | 2002 Chevrolet Impala

3 Answers

Dometic ac in RV


Do you have a wall mount thermostat? Thats what I would look towards first since its easy to get to. Don't let your compressor run with out the fan you can burn it up. I would just use the breaker as an on off switch intill you can get it looked at.

Jul 25, 2008 | Dometic Rooftop RV Air Conditioner

1 Answer

I have a Carrier 38tra048340 ac 4 ton unit outside, heater in attic. Thermostat is Totaline P374-1100. Power went out than back on after a few hours due to vehicle crashing into power pole. AC was running...


Blank screen sounds like a fried thermosat. Abrupt outages can affect certain types of thermostats. Make a jumper wire and jump across R and G. See if you get any action from anywhere. If a fan or compressor kicks in you know you have a burned out thermosat...

Jun 23, 2008 | Carrier Heating & Cooling

Not finding what you are looking for?
Dometic Rooftop RV Air Conditioner Logo

Related Topics:

79 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dometic Heating & Cooling Experts

Bill Long

Level 3 Expert

588 Answers

Tim Whalen

Level 3 Expert

3074 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Are you a Dometic Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...