1. Found the control module on eBay but I'm wondering if there was a particular reason you didn't go with a Coleman thermostat like the 8330-3362 that already has the capability to select fan speed?
You can use any thermostat you like, I used the Honeywell since they are easy to find and it is like the one in our house.
2. How do the control wires for the propane heater get wired into your new thermostat?
Put the new thermostat in the same location as the heaters so it was just a matter of making the heaters connections in the thermostat. Plenty of wiring diagrams showing how to make the connections.
3. You said it was fairly easy to fish the wires thru the ceiling and wall - exactly how did you accomplish that? I've got a fish tape but am not sure how to transition from the ceiling down the wall.
All my wiring is in line with the power panel in the overhead cabinet, fished from the AC to it and from it down the wall, just followed the other wires.
John & Mary Jo
Enjoying the adventure