Air Conditioner Blower Fan Not Working

If the fan is not working the coil could freeze.

Air conditioner blower fan not working.

Air conditioner fans not working can be a sign of a frozen evaporator coil. Many hvac related calls are due to the blower motor not working. You should shut off the air conditioning immediately. However if this air filter isn t changed it can become clogged which can prevent full force air circulation through your car s ventilation system.

Easy video on how to replace blower resistor and motor with 1 screw driver and in about 10min. See blower door safety switch. Before replacing the board make sure you check more commonly defective parts particularly the fan motor capacitor and the fan motor itself. Another reason why your car ac fan is not working could be due to your cabin air filter.

If this is the problem you will hear that the fan motor itself is indeed working but no air will be blown out of the conditioning unit. No electrical power to the fan or its controls check for a blown fuse or heating or cooling switch set to off. In air conditioning mode check the indoor unit for ice around the evaporator coil and refrigerant lines. Cabin air filters serve as a filter to the outside air coming into your car to make sure it is clean and not filled with contaminants.

Check for a loose or disconnected wire or a corroded electrical connector. If you can hear the blower motor running but no air coming out of the unit then it is possible the problem is with the fan belt itself. If the relay board isn t working properly the fan might not run. 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 certain that all of the other components are working properly replace the relay board. The relay board provides voltage to many components of the air conditioner including the fan motor. You can check for this problem by listening to the ac unit when it is turned on. If you have a belt driven blower motor fan and the fan is not blowing any air through the vents then it is possible that the belt may have become worn over time moved out of place or become damaged.

For instance the belt might may have shifted out of place worn thin or become damaged. The evaporator coil sits inside your home within the air handler unit furnace or fan coil pulling heat and humidity from indoor air as it passes through. With a frozen coil air will not pass through until the ice melts. Some control the blower fan with a relay.

If you are getting 24 volts between g and c then you probably have a fan relay problem or sequencer problem. Open blower compartment door a safety switch may be preventing fan operation. The evaporator coil can freeze up as a result of indoor blower fan malfunction low refrigerant charge low outdoor temperatures or other system malfunctions. Some of the heat pumps with electric heat control the blower using a sequencer.

Remove glove box pop bottom. Another reason for the fan not to blow is if the fan belt isn t working. Relay boards are often misdiagnosed.