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Inducer motor fan won come on - Heating & Cooling

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Check to see if theres power getting to the inducer motor, also check for loose or damaged wiring. If theres power the motor is bad. If not check the air flow switch, usually a disk shape with a silicone hose attached and two wires... take the hose from the furnace and blow into it and test to see if theres continuity, this switch is normally open and when you blow the switch closes. This is to make sure that the main blower is running so the combustion chamber doesnt burn up (and your house). Make sure your air filter is clean! If the switch is operational it could be the relay that controls the inducer motor, on newer models the relay is on the control board, check for error codes... try these things and if that doesnt work call your local furnace repairman!

Posted on Sep 09, 2010

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Posted on Jan 02, 2017

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How do I wire a induce fan motor


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.

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

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1 Answer

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