Everyone knows that BMWs are comfortable and luxurious on the inside but this comfort can quickly turn to discomfort if the Heating, Ventilation, and Air Conditioning blower malfunctions. The HVAC blower in the car is a fan that circulates the air through the vents in the heating and cooling system. It is used in blowing warm or cool air in the cabin so that the climatic conditions outside do not have an impact on the comfort of the occupants.
When the blower starts to fail, you will realize that there is either little or no air blowing inside your BMW. Here are some reasons for blower failure and how to solve this problem in your favorite car brand, BMW.
Causes of HVAC Blower Failure
When the HVAC blower is not working, there are so many components that could be responsible for the failure. One of the well-known culprits is a blown fuse. Other common causes of blower failure are bad resistors, faulty blower motors, wiring issues, and blocked cabin filters.
How to Handle a Faulty Blower in BMW HVAC System
- Check and Replace the Fuse: Begin by looking at the fuse that regulates the blower motor. Locate the fuse box of your BMW and consult the driver’s manual to determine which fuse is responsible for the blower motor. If the fuse is blown, it will require a replacement. Replace the fuse with a new one that has the same capacity as the one that was blown. This is a very cheap solution to the problem if the fuse is actually the cause of the blower failure.
- Inspect and Replace the Blower Motor: If the fuse is in good working condition, the next thing that should be done is to check the blower motor. The motor is usually situated behind the glove compartment or under the dash panel. You can check if the motor is getting power by using a multimeter. If the motor is getting power but not functioning, it will most probably require replacement. Remove the old motor and replace it with a new one to ensure that there is a smooth flow of air.
- Replace the Resistor: If the blower motor runs but is only always high or low or not running at all then it is very likely that the blower motor resistor is the culprit. This resistor is typically close to the blower motor. It regulates the speed of the blower; therefore, when it is faulty, the blower cannot work as expected. Replace the resistor to get back the full functionality of the blower.
- Check the Wiring: Look at the wires linked to the blower motor and resistor. Check them for any signs of wear such as broken wires or connections that are loose. Faulty wiring can lead to the blower motor not getting the power it needs. Solder any damaged wire and ensure all the connections are in good shape.
- Replace the Air Filter: If the airflow from your HVAC system is weak, the problem can be a clogged cabin air filter. A dirty or clogged filter will limit airflow and lead to the impression that the blower is not working. Clean the filter if it is dirty or replace it if it has been a while since it was last changed. A clean filter will allow air to pass through freely facilitating the functioning of the blower motor.
Stop At Import Motorworks For Affordable And Efficient BMW Service
Import Motorworks is one of the choicest automotive repair centers for Import cars in Tennessee. Our workshop is situated in McDonald, TN, and from here, we provide our regular clients with maintenance and repairs of their vehicles. Our ASE-certified service technicians are always ready to assist BMW drivers regardless of the problem they have with the car.
If you think that your HVAC system is not performing as it should or it has stopped working, then you can bring your BMW to us for checking and necessary repairs. We also provide services to drivers in Chattanooga, Ooltewah, East Brainerd, Cleveland, Harrison, TN, and Ringgold, GA. You can reach us at the following phone number; (423) 238-7600 to speak to one of our BMW technicians.
