Question about Dometic Rooftop RV Air Conditioner

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New dometic air wont work

I installed a new roof unit but the unit will not do anything. it does have power to the unit

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This is a controls issue and could get complicated if you know someone that could follow electrical controls you might want to give them a call. The first thing is to see if the t-stat is sending voltage to the contactor coil to pull in the high voltage side for the fans and compressor.

Hope this helps Ya please rate me.

Posted on Jun 22, 2008


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Sounds like fan is clicking on roof top dometic RV ac unit, but fan is not hitting anything.

check fan shaft and blade to make sure mud dober or mouse didn't build nest in there. if they did remove it and see if it works.

May 30, 2015 | Dometic Rooftop RV Air Conditioner

1 Answer

I purchased a dometic roof top ac unit mdl#641515.301c0, however on the website i cannot find install manual or user manual

What part about installation are you having problems with, and what are you installing it on? Do you have both upper (roof) unit & lower ( at ceiling) ? Is it a ducted system or blowing directly from ceiling assy?
Check this link as well , you may find 6300 series is same install.

Jun 02, 2012 | Dometic Rooftop RV Air Conditioner

1 Answer

How to replace rv roof ac?

I will assume that you are aware of the fact that both upper ( unit on roof ) and lower control unit ( inside at ceiling ) will need to be replaced. That obviously adds to cost, instead of just replacing upper unit with same as what's there. Be sure to shut power off at breaker panel to start with. There is only 4 bolts, usually 1/4" with either 3/8" or 7/16" head, That holds the upper to lower. Once you remove them, and any extra screws that may go into ceiling from lower unit, the 2 pieces are separate. Disconnect any wiring ( mark wires if thermostatically operated) from lower unit, and if it's not ducted in the ceiling there will be ducting attached from upper to lower unit usually with flanges that have screws in them. 3 Philips screws where it attaches at base of upper unit, and that should drop down. That should be it. Now just lift unit on roof up and off. May take a bit off effort as some stick pretty good. Be sure to watch if you have a rubber roof that the rubber isn't ripping. I have had some that the person who installed it used some sealant at gasket surface, and had to very carefully lift and pry it apart, but as I said, if you find same, watch rubber for ripping. No need to apply anything to gasket if roof is clean, just set new one down over hole, even it up and draw down from inside with new ceiling assembly and bolts equally. Only compress gasket to approx 1/2 it's original thickness when tightening down, do not squish it.

Mar 03, 2012 | Dometic Rooftop RV Air Conditioner

1 Answer

How do you fix seal leak on dometic rooftop air conditioner ?

remove filter etc. from ceiling assy, you'll see 4 bolts that you remove,(basically 4 corners of lower tray at ceiling) unplug wiring harness and connector, that goes to upper unit from lower, then lift upper unit up off roof. position upper unit to allow for removal of 14" gasket. Install new gasket, set upper unit back over hole align properly, and re-install 4 bolts. Snug evenly until gasket is approx. half thickness of original. Re-attach harness plug etc.

May 06, 2010 | Dometic Rooftop RV Air Conditioner

2 Answers

How difficult / expensive is it to install a heat strip in a Dometic roof top AC? The unit I have has a mark on the knob for heat, but I suspect it was never installed.

Fairly easy. The only thing that you must figure out is how many amps the heat strips will draw. Make sure the fuses and the breaker switch can handle them. And be aware your electric bills will shoot up.

Oct 20, 2009 | Dometic Rooftop RV Air Conditioner

2 Answers

Is an old unit worth fixing?

I recommend going with a new one. Both the coleman and the carrier are excellent and a whole lot more efficient that the 16 year old dometic.

May 01, 2009 | Dometic Rooftop RV Air Conditioner

2 Answers

RV Dometic AC Comfort Control Double EE Problem

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.

Mar 24, 2008 | Dometic Rooftop RV Air Conditioner

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