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My roof top duo therm a/c unit was working fine this weekend untill it all of a sudden stopped blowing air the compressor kicks on but the fan does not

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Check for the presence of voltage supply to the fan motor,if it has voltage,check the winding of fan motor if it has resistance base on its connections.if the fan is defective,perform a rewinding of coil

Posted on Apr 23, 2014

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1 Answer

Have A Duo-Therm air conditioner on top of my motorhome and it stoped cooling, the fan works fine. Is there a fuse in the box under the filter? It says there is on the out side. I am not sure where it...


Can you please reply with model number off bottom of upper (roof) unit. Should be able to see it when filter is removed from ceiling assy. Please include model of thermostat if possible. You say fan works, but when turned to cool, no compressor kicking in? Try shutting unit off, and turn off breaker at panel as well, give it a few minutes and retry and see if anything changes and let me know.

Aug 16, 2011 | Dometic Rooftop RV Air Conditioner

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Duo therm roof top camper a/c. fan runs but compressor stopped kicking on all of a sudden. replaced both capacitors; getting 110 to compressor but it still wont kick on


Hi,
Sounds like the compressor is toast...if the caps have been changed and there is voltage there, you have done all you can...replace the compressor or buy new...

heatman101

Sep 01, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

RV Dometic Duo Therm roof top AC w/heat pump Model #630515.321El Serial #21631212 Yr. 2003. It is the rear unit, front unit working fine. In AC mode it is blowing hot air as if the heat pump is on. Fan...


If the Air comeing out is the same as the temp inside the RV make sure the compressor is running and not just the fans. It could be low on freon. If freon is ok then you would need to ck the wiring to the selector switch for a short. It would be obviouse because there will be melted wires. I am leaning toword low on freon since you have already been inside the wiring/control unit.

Aug 08, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

I have a Dometic Duo Therm rv Roof Air Conditioner Model# 59516.531.The fan is blowing and the compressor is kicking on but it is not blowing out cold air. Someone said it must be out of freon. Why would...


These are a closed system.(meaning that there is no fill valves for recharging) But a heating & cooling technician can solder them on and re-charge the system. Only problem there is to get an estimate up front, and compare it to buying a new roof unit which also comes with a new warranty, as well as keep in mind that the freon went somewhere, so there is an obvious leak that will need to be addressed as well. Most times it's wiser and cheaper in long run just to buy a new roof unit.
Are you sure that the compressor is kicking in? Did anyone remove cover on roof and check lines from compressor to see if any cooling is occurring?
These don't often leak, that's why I'm asking. Any idea how old the unit is?
Perhaps in fairly new, it's a warranty issue.

Jun 25, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

Duo Therm Fan Blows, No cool air. Worked yesterday, not today?


most likely compressor running could be capacitor, breaker,relay,or compressor it self start by checking power to unit

Aug 22, 2009 | Heating & Cooling

2 Answers

Compressor won't kick off


What happens when started in just fan mode? Sounds like relay stuck.

Jul 28, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Duo Therm AC Not Cooling


most likely a thermostat problem most rooftop air units fan will blow cont. and compressor cycles

Jul 26, 2009 | Heating & Cooling

1 Answer

I have a Duo Therm Roof top Camper air conditioner


how old is unit and does it have refrigerant in it

May 30, 2009 | Dometic Rooftop RV Air Conditioner

2 Answers

Duo therm air conditioner


My problem is the fan never goes off runs 24-7 and you can hear the compressor kick in from time to time. Is something wrong or do they all do that for a roof top unit? Any help on this one?
Frank

Jul 05, 2008 | Dometic Rooftop RV Air Conditioner

1 Answer

Duo-therm by dometic ac rv unit


I suspect that you have a bad selector switch for the on, off, low fan, high fan operation. If the selector switch is put into the off position everything should stop completely.

Apr 30, 2008 | Dometic Rooftop RV Air Conditioner

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