lenox furnace help

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Old 02-08-03, 08:07 AM
e swany
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Unhappy lenox furnace help

the furnace exhaust fan does not shut off always stay s on is there a pressure switch or computer gone bad also pretty often the ignition system wont start the furnace it clicks pilot just wont catch 10 year old lenox any help appreciated ps i can get parts at cost so it ll hep knowing what i might need
 
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Old 02-08-03, 11:08 AM
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induced draft motor

is powered through the board. with no call for heat, the motor should not run. prepurge and post purge are about 30 seconds each. if there is no power from white to common after 5 minutes, and the fan is still running, i would think the board. beware, though, 50% plus of all boards that are replaced are not bad.
 
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Old 02-08-03, 05:13 PM
e swany
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sis that the only cause or is there another problem that might do it to
 
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Old 02-09-03, 06:51 AM
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constant fan

inducer motor powered straight from the board. if no call for heat (remove white tstat wire) and inducer fan continues to run, replace the board. although 50% of replaced boards are not bad, 50% are
 
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