Question about Dometic Rooftop RV Air Conditioner

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Furnace won't turn on, off, with or without remote

My suburban furnace SF30 and Duotherm AC use a dometic remote. This cold morning it stopped working. Batteries are good. Won't turn on, off from the remote or from the ceiling mounted control. Help!!!

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  • barbrogers Feb 08, 2009

    You won't believe... First we shorted the wires to the thermostat and the fan came on. That showed that the thermostat was the problem. Then we asked another camper with our model if we could try our remote on their furnace. It worked. Then the other camper said he had problems earlier and the solution was: unplug all electric including the battery, wait a few minutes, plug in again. Somehow the process reset the circuit board. IT WORKED!!!

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We hotwired the thermostat wires and the furnace started. That told us that the problem was with the thermostat. We took our remote control to another camper like ours and our remote worked their furnace. That told us that the problem was in the ceiling control for the furnace/ac. But the man who owned the other camper told us that he had a problem, too, and was told to unplug all the electric including the battery, wait 2 minutes, and hook up again. This might reprogram the circuitboard, and voila! It worked.

Posted on Feb 09, 2009

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