Thor Forums

[EA37TS]

Originally Posted by Chance

I'm curious, can furnace fans be run without the propane heat on in modern furnaces? Like running AC with just fan? Just wondering if it's possible to circulate warm coach air through furnace ducts to keep the tanks above 32 F. I'm asking as it affects heated-tank option.

Good question. I know I can run the fans without AC or heat, however, if I switch the fan to 'on' using the dual thermostat (AC and Heat) I'm not sure which fan runs, the one for the furnace (floor ducts) or the one for the front AC (ceiling ducts). Tonight when I go out to the coach for some maintenance time I'll check and answer the question. For clarification, in my coach with dual AC the thermostat for the front unit is the one that controls heat as well as AC. The thermostat for the rear unit controls AC only.

The way I understand it the Cheap Heat system uses the existing furnace fan (required to be operational for installation) and includes a switch for selecting electric or propane heat. One thing I just noticed on their FAQ is that if wired for 50 AMP service the system will not run if you are adapted and connected to campground 30 amp.