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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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Our Lennox Dimension furnace will not start/ignite. I hear a

Customer Question

Our Lennox Dimension furnace will not start/ignite. I hear a slight humming noise when calling for heat but nothing else.
JA: Did you double-check the thermostat's settings? And what about the filters?
Customer: Filters were replaced this summer. Thermostat was set for heat.
JA: Do you plan on doing the work yourself?
Customer: Only if the solution is relatively easy.
JA: Anything else we should know to help you best?
Customer: The furnace for the second floor (same model) works fine. Lower floor does not. They run on LP gas.
Submitted: 8 months ago.
Category: HVAC
Expert:  airheatman replied 8 months ago.

Can you give me complete model from inside furnace in burner compartment so I can provide guidance with this specific unit.Model will be on a label just above burners on right or left inside panel

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