Air Handler Blower Fan Not Working

Relay boards are often misdiagnosed.

Air handler blower fan not working.

Indoor air handler or blower unit for a c or heat pump or furnace systems. How to inspect repair the indoor components of air conditioners and heat pumps. Then check out our page heat pump iced up in summer. If the blower motor fails to start nothing happens.

If the relay board isn t working properly the fan might not run. Before replacing the board make sure you check more commonly defective parts particularly the fan motor capacitor and the fan motor itself. 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. Even if it s not a heat pump some equipment still use belt driven.

Air conditioner fans not working can be a sign of a frozen evaporator coil. The relay board provides voltage to many components of the air conditioner including the fan motor. If the coil is frozen shut off the air conditioning immediately. 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 fan blades don t spin at all it s likely the condenser fan is not working and possibly burnt out requiring replacement. If the fan isn t working that can cause the coil to freeze. The blower motor starts turning fan blades that circulate cold air from the evaporator coils through the home s ductwork and into each room. 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.

Clearly the air conditioner blower is an absolutely indispensable part of an air conditioning unit. 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. This article series describes in detail the testing and diagnosis of problems with air conditioning fans and with forced warm air heating blower fans found in the air handler or ahu. 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.