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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have a Heil DGF090NS00 gas furnace and the burner keeps

Customer Question

I have a Heil DGF090NS00 gas furnace and the burner keeps cycling off and on. I can't see a flame sensor and the stack switch is buried behind the exhaust. What would cause the cycling. Note the fan continues to run
JA: Did you double-check the thermostat? And what about the pilot light?
Customer: The thermostat seems to be functioning fine and pilot stays lit.
JA: Do you plan on doing the work yourself?
Customer: If it is straight forward. Otherwise no.
JA: Anything else we should know to help you best?
Customer: Nothing that I can think of.
Submitted: 10 months ago.
Category: HVAC
Expert:  BillyHvac replied 10 months ago.

My name is***** see your question stumped the panel here.

I just logged on and saw you had not received an answer yet.

I am willing to help you if you still need assistance. Just let me know how the project is going and I can help you or close this question for you.

Once again I apologize for the delay.