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...
Blocked or obstructed exhaust Spark electrode/flame sensor out of position (should be directly over burner slot and engulfed by main flame) Spark to ground gap should be 1/8" Cracked ceramic can cause erratic operation...flame signal goes to ground instead of to circuit board Dirty/loose contact on connector to circuit board Flame sensor failing