My 95 coach has the original Atwood heaters. Both have been working well. Today, my front one started behaving strangely. When the thermostat called for heat, the fan would start as usual and the burn...
The thermo coupler that keeps it lit once it's lit can go bad (if it has one) It is a a Thermo (kept open by heat) switch and it looks like a tube smaller than a pencil sticking in the area where the burners flame would contact it. Make sense?