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Old 09-09-2011, 07:34 PM   #1
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inducer blower motor stays on 24/7


I'm troubleshooting an 80% furnace with an IFC board and its inducer blower motor stays on constantly even though the thermostat is set on Off and the fan on AUTO. Any suggestions anyone

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Old 09-09-2011, 07:47 PM   #2
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inducer blower motor stays on 24/7


Check the limits

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Old 09-09-2011, 08:51 PM   #3
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inducer blower motor stays on 24/7


relay board contacts might be arck together remove the W wire off the board that is your heating call see if the relay drops the ID out
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Old 09-10-2011, 02:50 PM   #4
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inducer blower motor stays on 24/7


All of the above plus there is a relay that sends power to that motor.It is probably on that board.The contacts have welded themselves together.You might get that to release by tapping the handle end of a screwdriver on that relay ,but even if that works you need another board.
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Old 09-10-2011, 04:05 PM   #5
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inducer blower motor stays on 24/7


four calls come out of or OFF the board..the ID,pilot ignition, and the gas valve voltage then the supply fan motor on a timed delay the black cubed relays are the 115V loads..when your stat calls for heat the first thing to run is the ID
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