Question about Dometic Rooftop RV Air Conditioner

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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 sj-parks@hotmail.com.

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  • flattire Mar 28, 2008

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

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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

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1 make sure sensar place of thermostate

Posted on Mar 28, 2008

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