Furnace Exhaust Fan Not Working

If there is a battery check if it is working properly.

Furnace exhaust fan not working. Part of an interactive video. If set too low you may be cold but your furnace thinks. Take these three steps as soon as you realize that your furnace isn t working. If you notice unusual sounds coming from your exhaust fan we recommend performing these steps to troubleshoot the issue.

First make sure that power is getting to the motor. You might need a new motor module on ecm motors. Clean the fan after turning off your furnace completely. This sounds like you might have a control board going out.

Check your furnace blower fan after ruling out all of the simple problems above the most likely cause of a furnace not blowing air is a problem with the blower fan itself which if you remember is the fan that circulates your house s air over the heated coils. If no voltage is recorded you will have to replace the board or the relay. I would like to suggest that you make sure if your motor has a capacitor that the capacitor is good and up to specs. If you have a high efficiency ecm motor then you might have a motor module going out.

This sounds like your motor might be over heating. If the blower fan is unobstructed but does not spin freely replace the blower motor. The first thing to do is check the relay or voltage from the board. One of the most common problems with furnace fans is a bad blower relay.

I would suggest that you check all connections on the furnace to make sure they are good and tight. Furnace not working oil burner first of all if the oil burner goes on and off too much clean or replace the filter. If your oil burner doesn t work at all check to see if it is receiving electrical power if the thermostat is broken or turned off or if a flame sensor in the burner or heat sensor in the stack has signaled the unit to shut off. Inspect the fan while your furnace is powered on take a look at how your fan is running to see if you can pinpoint.

If it has reset and allow time for a normal heating cycle. Check to see if thermostat is set appropriately. If power is getting to the blower motor but the motor does not run the motor may be burned out. If the blower motor hums check the blower fan to ensure that it spins freely.

This is another common reason behind faulty blower fans.