When the thermostat calls for heat the furnace fan comes on and keeps running until after the burner shuts off and the heat exchanger cools down. On my 2002 coach I found that since the sensor for the furnace was way up front over the driver, the temp by the dinette was higher that at the sensor. This was after I had modified the heater ducting to deliver more heat to the front of the coach. When I got the coach, the front was cold and the bedroom hot. I usually only set the thermostat to about 67 to 68 degrees, sometimes even lower on start up. If you find the front of your coach cooler by a lot than the rear you may have to set your thermostat even lower yet. On initial heat up in the morning, until the temperature in the coach stabilizes, it still gets hot in the dinette area even after the burner turned off until the fan shut off.
Las Vegas, NV
Had: 2007 Limited SE 40fdts