Carrier Furnace Inducer Motor Fault

Fault code 11 means the inducer motor is functioning properly.

Carrier furnace inducer motor fault.

Draft inducer motor failure. These tubes are the small one coming off the firebox and motor housing going to a drain. 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. Bad capacitor causing motor not to start up.

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. Blower motor fault indicates the blower failed to reach 250 rpm or the blower failed to communicate within the prescribed time limits. Usually found where the cold air enters the unit either in the cold air return duct or the entrance to the blower chamber. This is always helpful to pinpoint the problem to the inducer motor in the first place.

Reconnect pl3 to the variable speed furnace control and connect a dc voltmeter across terminals pl3 4 blue and pl3 2 green. Locate the current filter. The draft inducer blower is a relatively new component found on modern furnace units. One common issue with any blower motor in hvac systems is a bad capacitor.

Open the door panel to get access to your carrier furnace. 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. From the carrier 58mvp service manual.

Take out the old air filter and replace it with a new one.