I have a 2007 Fleetwood Sun Valley that I absolutely LOVE....... except for the heater..... First of all, we only use the heater once, maybe twice a year, as most of our trips we have access to AC power, and we use a really quiet electric space heater. However, once a year, we go to a music festival with no AC, and rely on battery power, thus, have to use the installed heater. And, occasionally, we have some REALLY cold nights and have to fire up the installed heater to supplement the space heater. So, this weekend, we went to the music festival. When I went to turn on the heater...... nothing..... I spent probably an hour trying to trouble shoot it. Main furnace breaker on and off, thermostat on and off, temp adjusted, camper breakers on and off, switching propane tanks..... nothing seemed to work. Luckily, we keep lots of extra blankets with us, and it didn't get REALLY cold. Got home and tried it on AC power. Nothing..... after about 20 minutes of fiddling with it (basically just turning it on and off over and over again), it kicked on, but didn't ignite...... Then, after some more fiddling around with the switches, it turned on and ignited. Then, a little bit later, it wouldn't blow or ignite. Then it would. I tried it again on battery power, and got the same intermittent results I got on AC power. Turned it off and left it alone for the night, and tried again this morning. On AC Power, same intermittent results. I can't figure out what would cause such different results, despite not actually changing anything. Does anyone have any experience with something like this, or any advice for me? Thanks.