Question about Dometic Rooftop RV Air Conditioner

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Dur-therm furnace heat controll with Dometic remote

With the Dometic remote the heat will not stay constant. I have to keep clicking the remote temp controll up to make the furnace restart. If it does restart on it's own it is only after the heat has dropped 10 degrees or so.

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I would suggest that you look at your thermostat,it may be to close to the furnace keeping in mind that all thermostats have a certain tempreture drop (or gain) before restarting john

Posted on Jan 15, 2009

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Make sure fan relay is wired correctly (G) wire. Ensure the fan on therm is not on, it should be on Auto or off.

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Set the heating system on aux heat only. Fan should not be on, if it does stay on after a heating cycle, see if the furnace is heating normally, and reaching temp as desired before the heat comes off. Then check the therm wiring, pull the face of the therm, disconnect green wire (fan) and try the heating again.

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Sounds like a stuck relay on the unit itself. Maybe there is a short in the control wire that comes from the thermostat that activates the fan.

The thermostat probably has one hot wire at all times. The thermostat then chooses which wire to send the voltage down based on your selection. One of those wires is probably for the fan only. Make sure that it is in good condition (no bare, pinched or wires)

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