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Topic: Re: Furnace Help!
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| UA Fitter
01-13-2013 09:44:55
74.112.141.8
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That blower is the draft inducer, and it creates the draft necessary for the very cool combustion products of a high efficiency furnace to exit your house via the PVC vent. I don't know where you live, but sometimes in cold weather, the vent will block from an ice accumulation, making the air flow switch in the furnace not make and preventing the furnace from firing, check the outlet. If it's clear, open the furnace, and you will see a tube running from the inducer housing to an air flow switch. Use a multimeter or test lit to prove that the switch is making. I'll bet your problem is somewhere in the vicinity.
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| OHReader
01-13-2013 16:38:37
75.93.176.155
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Re: Furnace Help! in reply to UA Fitter, 01-13-2013 09:44:55
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| Good suggestion. It also has to be completely clear, not just part way. A few yrs ago, our hi-eff furnace did the same thing. Line appeared to be clear but turned out that snow had covered over part of the pipe, then turned to ice farther down. I had to take it apart and run a shop vac into that line for about 30 min before it all melted.
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