[scottz]

Originally Posted by joe direnzi

Hey Scott,our3721rl forward t stat only controls the fwd a/c.The rear t stat controls the rear a/c,heat and heat pump. You cannot control the heat from the fwd t stat.

Both of my thermostats have a "furnace" position. Probably just controls in parallel; either can turn the furnace on, but it heats the whole trailer. Just trying to figure out how it works. I'll do some testing.