Furnance won't start

[CeloNC]

Installed new Suburban furnace one year ago in my 1970 Sovereign. It worked fine all winter. Now it won't start. When I move the thermostat up, I can here the furnance click but even the blower won't come on. I have gas and the stove burners are working. I went through all the shut down/start up steps in the manual and still no luck. I'm looking for soemthing I missed to try before I yank this out and have it bench tested. Any ideas? Thanks.
Bill

[dkottum]

I suppose the click you hear is igniter, but it seems pretty warm for testing the furnace right now. I'm not sure of the sequence, but perhaps a sensor is too warm to allow propane to come on.

But then there may be air in the line that needs to be purged before propane is available. And is the propane on at the tank. I usually light the stovetop first to get propane flowing after sitting or changing tanks.

doug

[daveswenson]

Originally Posted by CeloNC

Installed new Suburban furnace one year ago in my 1970 Sovereign. It worked fine all winter. Now it won't start. When I move the thermostat up, I can here the furnance click but even the blower won't come on. I have gas and the stove burners are working. I went through all the shut down/start up steps in the manual and still no luck. I'm looking for soemthing I missed to try before I yank this out and have it bench tested. Any ideas? Thanks.
Bill

If the blower doesn't run the furnace will not light. The sail switch senses air flow from the blower and must close for the gas valve to open. There's a very good explanation of furnace ops in the latest Blue Beret. If you hear clicking I'd suspect the control board, but I'm sure someone with more experience will jump in.

[CeloNC]

Thanks dkottum and daveswenson. We have had the wettest summer in NC history and that may have played a role in messing up the furnance electronics. I am probably going to have to pull it out and have it bench tested.
Bill