Blower Fan Motor Not Working

The first thing to do is check the relay or voltage from the board.

Blower fan motor not working.

If both the compressor and the fan motor won t run use a multimeter to test the temperature control thermostat for continuity. Some of the heat pumps with electric heat control the blower using a sequencer. Blower stopped working last thursday it came back on friday after i wiggled the blower motor resistor went back out saturday. It doesn t work on any speed.

If the motor turns the connector is bad. Connect the black lead to a ground and then to the blower motor assembly. If the thermostat does not have continuity replace it. The blower motor is crucial to the proper function and operation of your hvac system.

If you start at the blower motor and check resistance in the circuit you will find the problem in no time. Many hvac related calls are due to the blower motor not working. I went ahead and replaced the blower motor resistor and cabin air filter but it is still completely dead. Some control the blower fan with a relay.

This is another common reason behind faulty. If the motor still does not turn the motor is bad. Connect the red lead to a power source and then to the leads on the motor side of the disconnected connector. If there is a battery check if it is working properly.

You should be able to find this relay or sequencer by tracing the blower motor wires back to the relay or sequencer. If you are getting 24 volts between g and c then you probably have a fan relay problem or sequencer problem. If the compressor is running but the fan motor is not running the fan motor or the fan motor capacitor are likely at fault. If no voltage is recorded you will have to replace the board or the relay.

One of the most common problems with furnace fans is a bad blower relay. The most common symptom of a faulty blower motor resistor is a blower fan that only works on one speed usually high.