Flaky Furnace Thermostat
I have a Suburban gas furnace in my 4-year old 5th-wheel. The thermostat name on the front panel is "RVComfort.HP". When heating on propane only (that is, not using the heat pump), four times in the p...
Forum Discussion
dougrainer wrote:
Yes, the 72 degrees is the default when 12 volt power is off or disrupted. I would say you have a intermittent power problem supply to the Tstat system. Hard to run down, but a starting point would be the fuse connection at the 12 volt fuse panel and then the connections behind the Tstat and then the connections at the AC control board. Doug
I previously believed that the problem only occurred when dry camping and the battery voltage would drop to around 12.2 volts. It is now happening when connected to shore power and the DC voltage is well above 13.5 volts. I have checked the fuse panel for corroded terminals, and I have checked the connections between the thermostat wires and the furnace and air conditioner/heat pump wires. (They are all wire nut connections.) All of the solder joints where the wires are attached to the thermostat circuit board look OK, but you can never be sure about that.
Anybody have any new ideas before I order a new thermostat?
Thanks
