I just swapped out my old thermostat (see attached photo) with a new battery-powered Honeywell (see photo). The furnace clicks on and blows out air but does not blow out heat. I have the camper plugged into my home and hope to run it off 120 in the future unless we have to run it off propane, which we only will do if we have to. The furnace clicks and pushes out air, just not any heat. Any help troubleshooting this before our trip this weekend would be great!