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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22514
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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Billy, I have a Lennox G40UH (I think that's right) that is

Customer Question

Hi Billy,
I have a Lennox G40UH (I think that's right) that is indicating normal operation (both lights green - flashing slowly simultaneously) and yet won't turn on - at all. I got the fan to come on (somehow) just by removing and replacing the bottom panel (shear accident), but no heat. Although, the lights did change to indicate roll-outs. Took off and checked the roll-outs. They seem fine. No clue from here.
Submitted: 1 year ago.
Category: HVAC
Expert:  BillyHvac replied 1 year ago.

Is the unit still coding rollouts?

When you turn to heat at thermostat..does the code change?