Hvac Blower Fan Motor Not Working

First make sure there is power to the indoor unit and that a switch or breaker isn t off.

Hvac blower fan motor not working. If the relay board isn t working properly the fan might not run. 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. 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. The relay board provides voltage to many components of the air conditioner including the fan motor.

Start by turning the furnace off turn your thermostat to fan only and wait a few minutes. No indoor fan fan not running fan not blowing no airflow. If no voltage is recorded you will have to replace the board or the relay. 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. 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. If there is a battery check if it is working properly. We will go over a few things to check before calling for service.

Purpose of the fan center relay. If you see or hear the fan turn on your blower motor is not the culprit. I found a real good youtube video made by acservicetech that explains the top 10 reasons why fan blower motors will not come on. 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.

Before replacing the board make sure you check more commonly defective parts particularly the fan motor capacitor and the fan motor itself. Relay boards are often misdiagnosed. The first thing to do is check the relay or voltage from the board. This saab 9 3 came in from another shop with the complaint of the hvac blower motor not working.

One of the most common problems with furnace fans is a bad blower relay. It takes much more energy to get the outdoor fan going than it does to keep it running. If the fan does not start you have a wiring issue circuit breaker trips or motor problem circuit breaker does not trip. In this one a soaking wet passenger carpet leads me to the c.

Now put your furnace s blower fan to the test.