I have a 2010 Palomino Popup P280, that has a 17,000 BTU Suburban Furnace. I went into it this morning when it was cool, and the blower was on (the propane tank was turned off). The thermostat was in the off position. It seemed like it was reacting to the cold and turning on anyway. Is this a common occurrence? Does it mean I have a bad thermostat, or improper wiring (if so, is there a simple way to check)? Or should I simply figure out if there is a fuse or breaker for it, and turn it off that way? Other than this problem, the thermostat and furnace seems to be working properly.