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Old 01-08-2011, 10:07 AM   #1
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Lennox G50UH series heating problem

Any help please. The blower is pushing out cold air. Upon turning on at the furnace port to examine operation, the blower initiates, the combustion air inducer runs for about 2 seconds, a series of clicking starts, the combustion shuts down the burners do not ignite and I am left wihth cold air blowing. The led indicators(#1 slow flash #2 steady on) indicate that the primary or secondary limit open and to check continuity or flow restrictions. Just put new filter in (the right way) because temp was dropping and did not know why. Any help from anyone. It's Saturday and I can't get a tech locally.

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Old 01-08-2011, 10:12 AM   #2
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Lennox G50UH series heating problem


Repost this request under HVAC section. That's where the experts monitor questions.

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Old 01-08-2011, 10:30 AM   #3
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Lennox G50UH series heating problem

There is a limit switch to prove combustion air has pressure, sounds like this switch is not closing.
When its all said and done there is usually more said than done
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