Furnace won’t heat or stay on

[gpearson26]

I have a 2019 26BH.
The fridge, stove and water heater all work on propane.
I have disconnected the tank, reattached it, opened the line slowly, bled the lines and run other propane appliances.
When I turn the furnace on, it comes on, but doesn’t stay on any longer than ten to fifteen seconds. I’ve done this numerous times.

Any recommendations?

[us71na]

The furnace wont heat if there is not enough air flow through the heat exchanger. There is a safety switch called the sail switch that tells the control that the fan is actually running and air is moving. Most likely the sail switch is sticking so that it doesn't allow the furnace to fire.

[gypsmjim]

Run the fridge on electric, turn off the stove, and wait till the water is hot (and thus only the pilot light is lit). Then, turn on the furnace.

Sounds like you might be exceeding the flow rate of propane.

If that doesn't work, you have a furnace problem.

[gpearson26]

I didn’t mean all of those things are running at the same time. Just that they are all running fine using propane.

[jb7706]

Watch the 3 videos in the series. His channel also has several other heater troubleshooting videos. Very detailed and thorough:

https://youtu.be/fGunURT1UMY