neilblindauer Report post Posted September 22, 2020 (edited) I have a 2004 Country Coach with DuoTherm AC/Heat roof units. When I turn the thermostat on to fan only - AC - Heat - it will not start. The display does come on. I checked the main AC breaker and it is good. Edited September 22, 2020 by neilblindauer more info Share this post Link to post Share on other sites
hermanmullins Report post Posted September 22, 2020 Neil, Welcome to the Forum. If I set my thermostat to fan only then just the fan will come on. Do your AC/Heat come on when the thermostat is set on cool or heat? when you set the thermostat to fan will the Fan come on? if so than they are working as they were meant to. Herman Share this post Link to post Share on other sites
