Question about Dometic Rooftop RV Air Conditioner

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I set thermostat and it clicks on but nothing happens... Air doesn't come on .. nothing from unit on top of rv...

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  • watersedg193 Jul 14, 2009

    thanks checked that not the answer.....

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Check your circuit breaker. Thermostat is controlled by dc, compressor and motor are ac

Posted on Jul 13, 2009

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I have no voltage to my thermostat


Hi, I am not positive the control voltage to your thermostat will be on a RV a/c, most homes are 24 volts. I know yours would be less. If you have a 2-wire stat and this a/c is not working, take the two thermostat wires a touch and hold them together. Don't worry as this is safe and will not shock you. If the unit comes on and runs, you do have voltage there but the meter may be set wrong. If nothing happens, then you need to find the breaker for this unit to see if it as tripped. Reset it anyway. If still no power, you will need to find the transformer for this unit and check for power to it which will be high voltage/primary and power out which is the secondary low voltage which controls all low voltage controls such as the stat. If you have a wiring diagram on the condenser up top or most RV have a large book that tells you about your coache. If you have a diagram look for the thermostat as it will be labeled in the legend as a T with a circle around it or it may say stat. Follow to see where it gos from there, to the transformer or what and let me know. If the unit does fire when you jump out the stat wires, you will have to replace the stat. Please keep me posted on this. You may have a blown fuse up top cutting off power to the transformer also. You can ohm them out also. Keep me posted so we can solve this.
Sincerely,
Shastalaker7

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Dead in the water


Have you checked for fuses in/at, thermostat ? What type of RV is this in? Power board should need to be replaced again, if at all, my guess is it's something else. Do you hear any "clicking" form unit when you move thermostat to other settings? Is nothing working at all, fan, furnace etc?

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COLEMAN R.V. AIR CONDITIONER SERVICE AND REPAIR QUESTIONS
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The thromstat may be bad but it sounds like there is a loose connection where the wires plug on to the back side of the thromstat.

Any RV dealer should have the part or be able to order it for you

Aug 21, 2009 | Dometic Rooftop RV Air Conditioner

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