Central Air Blower Fan Won T Turn On

I would continue diagnosis by watching the behavior of.

Central air blower fan won t turn on.

What causes a thermostat to malfunction. Your system probably has a manual fan on switch on. If your system turns on but the fan never does the problem is something you ll need to have a pro take a look at. Fan will not come on in the on position or your fan will not come on when you turn the thermostat down in the air conditioning mode.

Fan has trouble starting in some cases you can give the fan a kick start by pushing it with a stick and if this occurs there is likely an issue with the capacitor. Test to make sure you are getting 24 to 28 volts ac between the g green and c com terminals on you fan center or control board. This can be caused by a number of things from bad capacitors and belts to a bad blower motor in general. This noise is caused by a part called a relay which opens and closes to turn your ac on and off.

Similarly if a fan won t turn when the power is on but will rotate freely when shut off it could be the sign of a bad motor bearing. Most thermostats control both central air and central heat. Those problems are explained at thermostat won t turn off. But here are some suggestions to start troubleshooting the problem of a furnace blower fan that does not start.

This is one of the most common and easy ways to know if your air conditioner blower motor is broken or not. If the air conditioner still won t work make the call. If you turn on your air conditioning system and find that there is no air blowing out of the ac unit or no buzz of the blower fan motor then it is possible the ac blower motor has an issue. The first is that the blower won t turn on.

At the furnace or air conditioner air handler or blower unit. If your thermostat is secured correctly to the wall this clicking sound shouldn t be very loud. I would start by confirming that the blower fan will operate. Other snafus such as a shorted thermostat wire can also cause the a c or warm air furnace fan to run continuously.

Check the fuses in the disconnect box located outside near the condenser to make sure there s power. The fan limit switch may include a switch that manually keeps the fan running. But if you hear a loud clicking noise andthe ac won t turn on it could mean the thermostat is malfunctioning.