Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. Symptoms of a Bad or Failing AC Fan Control Module

Symptoms of a Bad or Failing AC Fan Control Module

Fan Control module

An A/C fan control module helps to control the blower that supplies air to the cabin of a vehicle, as well as the cooling fans. The module helps to make sure that the cool air that is produced within the A/C system of a car is blown into the cabin. The A/C fans that are mounted in near the radiator of the car are also controlled by this module.

Usually, you will have a variety of signs that the A/C fan control module is going out. If the cooling fans begin to run erratically, then you may have a problem with the control module. Letting this type of issue linger can lead to a number of issues that can cause damage to your car. Getting the A/C fan control module replaced can save you a lot of time and money.

1. Cooling fans running for a long time

The cooling fans under the hood of your car are designed to keep the components of the system at a lower temperature. Usually, these fans will come on when the system gets a bit too hot and the go off once the desired temperature is reached. If you notice that the cooling fans run for a very long time without shutting off, then the A/C fan control module may need to be replaced.

2. Cooling fans not running at all

If the cooling fans are not coming on at all, then this may also be a sign that the fan control module is damaged. Without the cooling fans running properly, you will be at risk of having the car overheat. Running a car hot for a long period of time can lead to other damages like a blown head gasket.

3. Weakened air flow

Since this relay works the blower motor as well, you may notice that the air flow in the cabin of the vehicle is significantly reduced. The module helps to regulate how hard the blower motor works when needed, which is why it will cease to work with this part. Having a weakened air flow can cause the cabin of the vehicle to become very warm. The only way to fix this issue is by getting the AC fan control module replaced.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Still not sure about your car's issue?
Diagnose your car
What kind of issue are you experiencing?
Brakes are squeaking
Car is not starting
Car is overheating
Car is shaking (vibrating)
Fluids are leaking
Heating and A/C
Smoke or steam is coming out of the car
Warning light is on
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

How to Find the Keyless Code on a Ford Explorer or Mercury Mountaineer
Many Ford Explorers and Mercury Mountaineers were manufactured with an option known as the Ford keyless entry keypad. Some models refer to it as SecuriCode as well. It...
P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222...
P0477 OBD-II Trouble Code: Exhaust Pressure Control Valve Low
P0477 code means that the PCM has detected an abnormally low voltage reading often due to the exhaust back pressure control valve circuit.


Related questions

Q: Have heater for the front window while air conditioner is off

The heat is from the heater core of the engine. You are feeling the air that comes in from the fresh air intake vent for the A/C heat system just below the windshield on the outside. This is normal and...

Q: The temperature gauge is fluctuating but not over heating, I have changed the thermostat, the sender, and it still dose the same

Hello, thank you for writing in. The vehicle's cooling system may be having more of a technical error. With the sensor and thermostat both giving correct measurements, the issue is an actual temperature fluctuation. This can also be caused by...

Q: Hydraulic Fan

If the fan goes to 100 percent but does not reduce speed then the fan control module assembly needs to be replaced as an assembly as no parts are serviceable. A bad power steering pump may pass debris into the...