Blower Fan Motor Not Working

Some control the blower fan with a relay.

Blower fan motor not working.

Some of the heat pumps with electric heat control the blower using a sequencer. If you start at the blower motor and check resistance in the circuit you will find the problem in no time. If you are getting 24 volts between g and c then you probably have a fan relay problem or sequencer problem. If the motor turns the connector is bad.

Many hvac related calls are due to the blower motor not working. It doesn t work on any speed. If the motor still does not turn the motor is bad. Connect the black lead to a ground and then to the blower motor assembly.

If no voltage is recorded you will have to replace the board or the relay. Blower stopped working last thursday it came back on friday after i wiggled the blower motor resistor went back out saturday. This is another common reason behind faulty. Power supplied from the fuse panel.

The first thing to do is check the relay or voltage from the board. If there is a battery check if it is working properly. I don t think it is the fuse. The blower motor is crucial to the proper function and operation of your hvac system.

If both the compressor and the fan motor won t run use a multimeter to test the temperature control thermostat for continuity. If the compressor is running but the fan motor is not running the fan motor or the fan motor capacitor are likely at fault. The most common symptom of a faulty blower motor resistor is a blower fan that only works on one speed usually high. Connect the red lead to a power source and then to the leads on the motor side of the disconnected connector.

If the thermostat does not have continuity replace it. You should be able to find this relay or sequencer by tracing the blower motor wires back to the relay or sequencer.