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FUNK
Sep 7, 2008, 07:04 AM
I have a 5 year old Lennox furnace-model number G50UH-36B-090-03. The "pre fan" comes on, and then the burners, but the main fan won't start up.
hvac1000
Sep 7, 2008, 11:25 AM
Does the fan run when the thermostat is set to fan ON?