Carrier Furnace Inducer Motor Fault

From the carrier 58mvp service manual.

Carrier furnace inducer motor fault.

Usually found where the cold air enters the unit either in the cold air return duct or the entrance to the blower chamber. Status code 42 inducer motor fault step action go to does the voltage fluctuate as described in step 28. Locate the current filter. Fault code 11 means the inducer motor is functioning properly.

Draft inducer motor failure. The draft inducer blower is a relatively new component found on modern furnace units. Your furnace may also give you fault codes related to draft inducer blowers. Take out the old air filter and replace it with a new one.

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. This is always helpful to pinpoint the problem to the inducer motor in the first place. Thirty seconds after being turned on or ten.

One common issue with any blower motor in hvac systems is a bad capacitor. 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. Reconnect pl3 to the variable speed furnace control and connect a dc voltmeter across terminals pl3 4 blue and pl3 2 green. Open the door panel to get access to your carrier furnace.

These tubes are the small one coming off the firebox and motor housing going to a drain.