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Ac and heater wont work

I have a 94 prowler fifth wheel. The heat and ac won't work, what should I look for?

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Do you hear any clicking at all ( up near AC or down near furnace, when you move the thermostat ? Have you checked you breakers & fuses in the trailer?

Posted on Aug 14, 2008

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My heat isnt working now but in the summer time my ac works. but last year my heat woulodnt work but then one day started working. then the summer time my ac wouldnt work then one day started working an...


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I think you have a definite short and it's in the 24 volt circuit. The only problem is - 'finding a low voltage short' is not the easiest thing in the world to do - so - I would guess you'd need a Service Tech.

good luck!

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1 Answer

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You may have to remove your filter & look for a model # of your unit, so we can pinpoint your wiring to the thermostat. Usually the terminals on the thermostats are labeled -RC-RH- etc, and you simply move old to new of the same. A lot of times some manufacturers will use phone cable form AC unit to thermostat, and mix up the colors, that's the reason for going to the AC and see what color is used from there. It could be red from control box, connected to green wire to thermostat for example. Thats where you note it and wire accordingly.(terminal calling for red wire, would now be green) If your stumped, get back to us with that model#.

Jul 12, 2008 | Dometic Rooftop RV Air Conditioner

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