2014 - 37 foot Coachmen Encounter w/4398 miles (3600 miles to/from dealership for repairs) - 2 roof a/c's 2 thermostats, I know of 1 heater. Vehicle now out of 1 year warranty.
When I turn the front thermostat which controls roof a/c from kitchen/dinette to drivers seat on the a/c unit works and so does the heat.
When I turn the back thermostat on which controls the roof a/c from the 1/2 bath, bedroom, and full bath to the back of the coach it will cool, but when I switch to the heater it will not heat.
Each thermostat has a plus/minus button, and a cool/heat button, each have a digital number tempetature which shows in the small box. push the cool button to minus the temp goes down and the a/c works, push the heat button and push plus the temp goes up.
I did not know I could have 2 heaters.
Hot water tank being sanitized again as I type w/clorex.