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No Power to Duo-Term Thermastat

Over the winter I keep my heater on 45 to keep things from freezing. Sometime about the end of winter i went out and everything was working fine. However, a month ago I went out to the 5th wheel to check everything to make sure the AC worked because we were going to go to the lake for the weekend. There was no power to the thermastat. I had ran out of propane and I filled the bottles. I rechecked the thermastat and still no power. Thought there might be a reset button on the heater and checked for a reset button, but, that did not work. Checked all fuses. Checked all breakers. Took RV to a certified repair place and he checked fuses, breakers, tried new thermastat, new phone wire from the thermastat to the module in the roof of the AC, replaced the entire module in the AC unit. Still no power, He called the Dometic (Duo therm techs and they told him it was bad wire. It wasn't, Still no power to Thermastat. He said he could not fix it. Need to take it somewhere else. There is not another service area within 75 miles of my location. Any suggestions on where to look?

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Can you give me model #'s of thermostat & AC unit, as well as upper unit? Number of or at least a description of thermostat, and numbers for ceiling assy should be visible when filter taken off, as well as # for upper unit should be tagged on bottom of unit on roof.

Posted on Jul 19, 2009

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