Air Handler Blower Fan Not Working

Air conditioner fans not working can be a sign of a frozen evaporator coil.

Air handler blower fan not working.

Indoor air handler or blower unit for a c or heat pump or furnace systems. Even if it s not a heat pump some equipment still use belt driven. The air conditioner blower is basically the fan inside of an air conditioning unit that blows air through a cooling coil which transforms the air into an arctic blast refreshing your home on hot summer days. If the relay board isn t working properly the fan might not run.

Clearly the air conditioner blower is an absolutely indispensable part of an air conditioning unit. If the coil froze the fan could be working but the air wont go through the ice until it melts. 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 the blower motor fails to start nothing happens.

If the fan isn t working that can cause the coil to freeze. The air conditioning system indoor air handler units blower units or ahu s also called fan coil units including the air conditioner blower fan the indoor cooling coil or evaporator coil air conditioning system filters and the. How to inspect repair the indoor components of air conditioners and heat pumps. 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.

Before replacing the board make sure you check more commonly defective parts particularly the fan motor capacitor and the fan motor itself. Then check out our page heat pump iced up in summer. If you aren t getting 24 volts between g and c then you might have a thermostat problem a thermostat wire problem or the low voltage fuse on the control board might be blown. If the coil is frozen shut off the air conditioning immediately.

If the fan blades don t spin at all it s likely the condenser fan is not working and possibly burnt out requiring replacement. The blower motor starts turning fan blades that circulate cold air from the evaporator coils through the home s ductwork and into each room. Relay boards are often misdiagnosed. When the blower fan won t start the problem could be something as simple as a blower compartment door that is not fully closed or a clogged condensate drain.