What is the AC Fan Control Module?
With regards on the make and model you drive, the AC fan control module may be situated on the firewall under the hood, or somewhere else in the engine compartment. The AC fan control module controls both the blower motor inside the cabin, and the cooling fans in front of the radiator. If the module fails or starts to experience problems, you may observe that your cooling fans run for a very long time, or don’t run at all. You may also experience problems with the blower motor inside the cabin.
The AC fan control module is an electronic device, and because it’s fixed inside the engine compartment, it’s subject to high temperatures that may cause damage over time. It may also experience electrical problems, including wiring damage. There are also other problems that can mimic AC fan control module failure.
Bear in mind:
AC fan control module operation is not inspected during upkeep service.
Relay failure and other problems can mimic AC fan control module failure.
How to Fix:
The AC fan control module is confirmed that it needs to be changed
The faulty AC fan control module is removed
The new AC fan control module is fixed
The AC fan control module is tested for operation
The AC is tested to ensure proper operation of the AC fan control module
The AC fan control module is responsible for operating a significant number of parts on your car, but because it’s an electronic component and relies on other parts for operation, there are many potential issues that could render it inoperable. As such, if you suspect a problem with your AC fan control module or another AC problem, have one of your expert mechanics inspect and repair it as needed.
Common signs indicating you may need to change the AC Fan Control Module:
Cooling fans run for longer than normal after car is turned off when outside temperature is not high
Cooling fans inoperable
AC does not function (blower will not work but compressor turns on)
Importance of this service:
While the AC fan control module is in charge of controlling both the blower motor and the cooling fans, there are other parts here that could be the miscreant. These range from the fan resistor pack to the fan relay and more. We recommend having your expert mechanics analyze the system to determine the actual underlying problem.