How can I get my furnace to turn on? I recently bought a used tent trailer, whose previous sole owner said the furnace worked, but they didn’t use it. I found and connected red and white wires to the thermostat (they weren’t connected). Propane and electricity are connected. A switch on the furnace is on. But when I move the thermostat lever all the way on, nothing happens. Trailer is a 2003 Jayco QWest. Furnace is factory installed. Thermostat is a Suburban 1c20-130 — original I think (strangely mounted on the side of the movable countertop). Maybe the thermostat needs replacing? Any help is much appreciated!