Coleman Mach RV Comfort Thermostat

RustyScupper wrote:
Yesterday getting the rig ready for the season and fired up the electric heat strip in the AC unit and it worked fine except that the propane furnace also came on.

I have the Coleman Mach RV Comfort Thermostat and I assume that it is the little selector slide switch is malfunctioning allowing both heat sources to run at the same time.

I have had issues in the past where the propane furnace would run and continue past the heat setting and not shut off.

Any thoughts if I am on the right track?

Hi Rusty, I too have theColeman Mach rv stat. It operates in the same manner. I'm told that's normal. Mine is coupled with a heat pump. I have an Alfa38 5er. No manual provided by Camping World when purchased. ( they had them b4 signed papers, after papers signed oops they didn't have them, ya go figure!) So I don't know the btu value. My problem is: the gas furnace fan motor (12v) now runs constantly since service from CW. I'd rather not take it back there if I can easily remedy it myself.
I do suspect the thermostat.