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My Lennox G40UH will not start in heat mode. Filters and
yes filters and thermostat are working fine. It is getting a primary / secondary limit switch open code. I checked primary, both secondary and both rollout switches and they are all closed … read more
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I have a Lennox G40uh series gas furnace. The furnace will
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I have a Lennox G40UH-48C-110-03 furnace. It will only heat
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I have a Lennov G40UH Furnace. The temperature in the house
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i have a lennox g40uh(x) series furnace led 1 is slowly flashing
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My combustion air inducer is not starting when I turn the electrical
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I have a Lennox G40UH series furnace. The unit is 2.5 years
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I have a lennox merit c33-36c-2f. On Sunday, woke up and the
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Lennox G40UH(X) series. Installed Honeywell humidifier to 120V HUM-H and HUM-N terminals on board 2 weeks ago. Displaced a wire harness in process. Just found it tonight after furnace will not light. … read more
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