Furnace will not stay lit 2023 2970 Imagine

[kpmacker]

When the furnace motor comes on, I hear it trying to ignite for a few seconds, then that function stops. It will do this three times then cycle off. I have replaced the sail switch, doesn't seem to have solved the problem.

 

[Scott'n'Wendy]

If you hear the ignitor clicking, the sail sw is already satisfied. The motherboard will lock you out after three unsuccessful ignition attempts. So if the sail sw is happy with air flow, the ignitor is clicking, I would check/change your propane supply. There is also the possibility your gas solenoid failed but try with the other tank first.

 

[LanerC]

Do the other gas appliances work fine or do you have a low flame on the stove burner for example.

 

[kpmacker]

Other stuff is fine, and oddly, the furnace seems to be now too. I had not run it in quite a while, thinking maybe line needed to be purged/pressurized. Anyway, thanks for the input!