It sounds like you need a thermocouple.
How do I fix a furnace when there's banging when turned on and when it's shut off?
Why does the pilot light go out when my furnace kicks off?
Is 80 degrees too hot to run your gas furnace?
My gas furnace comes on at 4° below the set temperature on the thermostat. Is this a thermostat issue?
Had a technician come out last night change some things and now the heat exchanger is glowing?
What is wrong with my furnace when it ignites and then shuts off?
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Copyright © 2018 HubPages Inc. and respective owners.