Quote:
Originally Posted by dorechester
2017 Jayco 40 loft Coleman-Mack thermostat losses power after a heat cycle, I then have to remove the fuse, go to the furnace switch the power off and untwist the wires to rest the system. Any ideas what causing this ?
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It almost certainly is dropping input power when the thermostat ignites. That is an often reported Jayco issue, on here. The way Jayco wired mine, the thermostat shared a hot wire with the furnace and a ground with the lighting. The lights would flicker, and my digital thermostat would reset to 72 degrees, every time the furnace lit.
A filter for the light dimmer, then a new ground, then a new hot wire. Just noticed, last week that it still resets occasionally. My next thermostat (waiting for me to install in the camper) will be battery powered.
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