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GSR21-80 using 60J0001 Pulse Ingnition Control
It got a little chilly last night and my wife said turn on the furnace.
I set the thermostat to heat and it came on for 10 minutes. It locked itself out.
I had another controller so I hooked it up. It ran for about 10 minutes and the led went out on that one too.
I checked the pressure switch, replaced the air flapper, checked the intake and output piping.