Furnace in 2018 Tiffin Allegro open road 34pa

[TylerJB]

The furnace comes on and runs for about 30 seconds and turns off. What could be causing this problem and how do I fix it?

[jacwjames]

This is a safety feature that shuts the furnace down if certain parameters aren't met.


Can you hear the ignitor working and gas lighting.



If not it could be the sail switch that senses if there is enough air blowing.



Or if the ignitor isn't coming on it could be as simple as a wire loose, that's what happened to me on my last trip. Last day of a ~6 week trip the furnace wouldn't come on. I ended up finding the ignitor wire had come off the spade connector.

[TylerJB]

Thank you, I will check those things out.

[Domo]

The manual for your model furnace will probably have troubleshooting tips or using that model number you can search for solutions pretty easily.