Carrier Furnace Inducer Motor Fault

Open the door panel to get access to your carrier furnace.

Carrier furnace inducer motor fault. From the carrier 58mvp service manual. Added to ensure heating systems are able to comply with the most recent government mandated efficiency standards it is designed to facilitate the removal of gases and air from the furnace and out to the chimney. Draft inducer motor failure. Locate the current filter.

Fault code 42 means inducer outside valid speed range this indicates that 10 seconds have elapsed and the inducer motor has not started or the inducer motor has started but is not operating at expected r p m. One common issue with any blower motor in hvac systems is a bad capacitor. Your furnace may also give you fault codes related to draft inducer blowers. Leak in tubing defective pressure switch restricted vent bad inducer motor rule out motor it works if the tube off the induced draft blower housing are plugged it will cause this trip.

Thirty seconds after being turned on or ten. Part number part description part link 20054001 carrier 20054001 draft inducer motor assembly view carrier part 20054001 2272065 carrier 2272065 draft inducer motor assembly view carrier part 2272065 2272158 carrier 2272158 draft inducer motor assembly view carrier part 2272158 308088 751 carrier 308088 751 draft inducer housing view carrier part 308088 751 308118 405 carrier. Bad capacitor causing motor not to start up. Reconnect pl3 to the variable speed furnace control and connect a dc voltmeter across terminals pl3 4 blue and pl3 2 green.

This is always helpful to pinpoint the problem to the inducer motor in the first place. Take out the old air filter and replace it with a new one. These tubes are the small one coming off the firebox and motor housing going to a drain. Usually found where the cold air enters the unit either in the cold air return duct or the entrance to the blower chamber.

The draft inducer blower is a relatively new component found on modern furnace units.