Question about Dometic Rooftop RV Air Conditioner

2 Answers

RV Dometic AC Comfort Control Double EE Problem

We have two AC units mounted on the roof of our RV controled by a 5 button Comfort Control (CC). This 5 button CC was installed in September '07 along with two new boards on the roof AC units, this replaced an older 4 button Comfort Control unit. We are now unable to get our 5 button CC to turn on our AC units. We've checked and have 12V at the CC and checked the AC units on the roof and they have 12V. We even switched the boards on the roof AC units trying to get at least one unit working. We've reset the CC and get a FF message then EE. We purchased a second CC unit and are getting the same error messages. We had a factory authorized tech look at the sytem and he was unable to solve the problem. The model # for the AC units is 620315.321 we need a manual and any suggestions on how to fix our problem or additonal troubleshooting ideas. Thanks. Our email address is

Posted by on

  • flattire Mar 28, 2008

    Problem fixed - it was a **** in the cable between the control unit and the front AC unit.



2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I have a dometic duo-therm. The unit works great and fan blows strong and both high and low work., but air is coming out of the ceiling unit rather than the duct work. The bedroom unit works OK, but the air is strong out of one duct, and not much comes out of the others. The front unit only has air coming out on the A/C unit and none out of the ducts.

Posted on Mar 18, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert who has answered 20 questions.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

  • Expert
  • 86 Answers

1 make sure sensar place of thermostate

Posted on Mar 28, 2008


1 Suggested Answer

  • 2 Answers

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

a 6ya Repairman can help you resolve that 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 repair professionals here in the US.
click here to Talk to a Repairman (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Duo therm ac in my rv quit when the converter burned up does the ac need 12v to work?

there is a fuse located under the shroud on the roof AC on a circuit board that controls the thermostat to turn on the power to the Air Conditioner replace it it is marked F-1 or, on some F-2 etc.
the air conditioner works on both DC voltage for the thermostat and AC voltage for the compressor

Sep 08, 2013 | Dometic 3312024.015 Duo Therm Comfort...

1 Answer

The dometic roof ac humms when rv is on 110 ac unit was under warranty dometic sent a complete control board I changed control and stil have problem just like before. Dometic said one of the relays was...

not likely but possible. if they already had one bad board what's to say their production methods have changed since they made your last bad board. I have just had 6 bad compressors from this chinese company danfoss in one month! for only 2 freezers i have installed 3 bad compressors in each! nobody takes pride in production anymore they want the stuff to break.

Oct 10, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

There appears to be a problem with the thermostat/control panel. It won't turn on/off with out removing power. Once turned on, cannot adjust temp or mode or anything.

What type of Thermostat is this? If it is a Comfort Control Center, four or five button, then turn off the thermostat, hold down the mode and zone buttons at the same time and turn the tstat back on. When EE appears on the screen, then release the button and see if it begins to work. If not, then we need to check the control unit in the AC. Hopefully it is just a simple reset.

Jun 29, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Both roof top units on RV cool for awhile the go off

May be low voltage problem or bad connection this may cause controller to shut one or both down. Need to talk to RV dealer for assistance on this system.

Jun 28, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

13500 dometic ac for rv with anilog thermostat

My Unit is only about 5 years old; but it's working great now. I spoke to a man at an RV service department, he suggest replacing the thermostate and Jay box, which is the box inside my roof unit, accessable when I remove the filter. When I replaced the thermostate nothing changed, but the Jay box did the trick. The Jay Box came with a new thermostate anyway, and cost around $80. Good Luck

Feb 18, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

I have a dometic dou therm roof mount a/c model number 59136.331 with a comfort control center 3109228.001. I get an error code ee and have no information as to what this code is this is the only thing...

The thermostat needs to be reset. Turn it off and hold the top and bottom buttons in at the same time and turn the thermostat on. In a few seconds will read FF and you should be good to go.

Jan 11, 2009 | Heating & Cooling

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

1,445 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dometic Heating & Cooling Experts

Bill Long

Level 3 Expert

588 Answers

mike cooper

Level 3 Expert

884 Answers

Tim Whalen

Level 3 Expert

3074 Answers

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

Answer questions

Manuals & User Guides