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How do I wire a induce fan motor


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Steve Kjr

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Induced fan motors on older units are wired through the high limit safety on the stack - in series. When the furnace calls for heat, the induced fan motor comes on and after a time the furnace will light.

Older units have a temp switch in the stack that rotates to bring on the burners and blower motor. . When there is a call for heat, the induced draft fan motor comes on and then the burners will light.

After the heat exchanger is warmed up the limit switch will bring the blower motor on. That's basically how it works - there are two circuits - one for the induced draft motor and the burners and the other for the blower and high limit.

New units have a plug on the board you just plug in.


Posted on Oct 06, 2014


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SOURCE: Induced draft motor

The inducer motor is what takes the cabonmonoxide out of the house from the unit and should not be bypassed

Posted on Mar 08, 2009


Cris Sparks

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SOURCE: model m1mc 090a bw furnace pressure switch open.

did you check the hose from the inducer to the pressure switch? HAVE you unplugged the unit from the wall outlet to reset the board? DO you have a voltmeter? If you do you can run voltage across the switch and if you get 24 volts you are open.

Posted on Oct 24, 2013

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Here is a tip that wrote about how to buy heating and air conditioning parts online.

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