Carrier Furnace Inducer Motor Not Running

If i use a fiberglass filter it whines when the furnace is running at high speed but not at low speed.

Carrier furnace inducer motor not running.

Backed by the intelligent infinity control and a variable speed blower this two stage furnace will run in low stage up to 90 of the time. Applied 110 v to inducer motor worked. I have a carrier 58mca furnace. If the unit will turn on but the blower motor is not turning on there are a couple of ways to check if the draft inducer motor has gone bad.

No power to the inducer motor from the circuit board checked limit switches all are open. Jumped lower pressure switch. A failing inducer motor may create a noise shortly after a heating cycle begins. The first thing that is supposed to start when a furnace starts up is the draft inducer.

First make sure that power is getting to the motor. Shows no power from circuit board for high speed post for inducer motor and not from low speed post. And every gas furnace we make passes the legendary carrier 100 run testing for quality and reliable performance. Sometimes the bad inducer motor becomes very hot to the touch.

If the draft inducer does not start then you probably either have a thermostat thermostat wiring problem electrical problem control board problem or a bad draft inducer. Ran ohm meter on limit switches all open meter. A bad furnace inducer motor can result in a loud buzzing or whining noise and loss of heat. If the blower motor hums check the blower fan to ensure that it spins freely.

This could be a tapping noise or a humming or whirring sound. If the blower motor is burned out replace it. The inducer motor assembly starts slowly and if i kick start it with my hand will then spin to the required speed to start the furnace.