Hvac Blower Fan Motor Not Working

The relay board provides voltage to many components of the air conditioner including the fan motor.

Hvac blower fan motor not working. This saab 9 3 came in from another shop with the complaint of the hvac blower motor not working. If no voltage is recorded you will have to replace the board or the relay. First make sure there is power to the indoor unit and that a switch or breaker isn t off. Purpose of the fan center relay.

The purpose of the fan center relay is to provide a low voltage control 24 volts to control a relay that can be used to control two speed blower motors and auxiliary circuits in heating or cooling equipment many of the newer furnaces do not have fan center relays but many of the older furnaces and some new furnaces still do. Now put your furnace s blower fan to the test. This is another common reason behind faulty. In this hvac troubleshooting video i go over the top 10 reasons why the blower fan motor is not starting in a furnace air handler or packaged unit for air.

If the fan does not start you have a wiring issue circuit breaker trips or motor problem circuit breaker does not trip. As explained in the hvac blower motor guide an air conditioner blower motor and assembly is basically the fan inside the air conditioning system that forces the cooled air via the ac cooling coil through the vents and into the room space that is being conditioned this makes the air conditioner blower motor assembly one of the most important parts of your air conditioning system. If you see or hear the fan turn on your blower motor is not the culprit. If the relay board isn t working properly the fan might not run.

We have many people ask how can i find out why my fan blower motor is not working why does my fan motor not work when i turn on my furnace or air conditioner answer. I found a real good youtube video made by acservicetech that explains the top 10 reasons why fan blower motors will not come on. Acservicetech goes over what to look for in the system components that. One of the most common problems with furnace fans is a bad blower relay.

If there is a battery check if it is working properly. It takes much more energy to get the outdoor fan going than it does to keep it running. Capacitors send an electrical jolt to start a motor a start capacitor or to keep one running a run capacitor in an air conditioning system capacitors work with three different motors. However you want to word it if your indoor fan isn t working it could be several things.

The compressor the indoor blower fan and outdoor fan. Before replacing the board make sure you check more commonly defective parts particularly the fan motor capacitor and the fan motor itself. The first thing to do is check the relay or voltage from the board. In this one a soaking wet passenger carpet leads me to the c.

Relay boards are often misdiagnosed.