All ActivityMost RecentMost LikesSolutionsRe: RV Furnace Intermittently WorksFinally switched out the Time Delay Relay last weekend and no issues this week. Thank you all for the replies and guidance.Re: RV Furnace Intermittently WorksThank you all for the replies! We have limited internet so I apologize for the delay. Our RV furnace is an Atwood 8900-II. I am going to take it apart over Christmas and see if I can track down the culprit. Thank you all for a direction to start!RV Furnace Intermittently WorksHey All, New to the forum and spent a half hour or so combing through posts to try to find our specific issue. Unfortunately....no luck. I'm sorry in advance if this has been answered before and I was just unable to locate the post. We have a 1996 Wilderness 5th wheel. We have it parked where we are going to build and currently live in it full time. We have constant power that we are hooked to and a 250 gallon propane tank. Our heater works fine in above freezing conditions, but lately our nights have been slipping into the 20s and below and we've noticed that our pilot won't start on some cycles. I believe it is an intermittent pilot using 2 metal rods to create the spark. On a regular cycle, it will initiate, start blowing air, and within usually about 20-30 seconds the pilot will ignite. Sometimes though the pilot will not light when it is cold. We fix this by going to the thermostat and switching it to off. Wait for the blower to stop and the system to fully shutdown. Then we switch to the heat setting on the thermostat and it kicks up fine no issue. Not a pressing issue now, although it would be nice to stop waking up at 3 A.M. to slide the switch back and forth to kick start it. The only promising answer I've found online is that condensation could be freezing in the lines....I don't see how switching the thermostat back and forth would fix this though. Puzzled and confused, John Clark