Temperature plays an important role in the proper functioning of BMW cars. Extremely high and low temperatures of the car’s various components can be detrimental to its efficiency and smooth driving experience.
The BMW Heating, Ventilating, and Air conditioning (HVAC)) blower is responsible for circulating air through the system by drawing air from outside and within the car, and passing it over to the heating and cooling elements, which further pushes the conditioned air into the car cabin, to ensure regulated interior temperature and improve comfort. A fault in the blower is a fault to the entire HVAC system.
This guide shows why it is important as a BMW car driver to be aware of problems that can befall the HVAC blower, and actions to keep it running effectively.
Why your BMW’s HVAC Blower is not Working
The HVAC blower not performing its designed function can be attributed to a number of reasons. Some are:
- Faulty Fuse: The fuse in the BMW HVAC system is engineered to regulate and transfer power to the blower motor incase of overload and short circuit. When this fuse is faulty, power supply to the motor is cut off, and the blower does not work.
- Blower Motor Failure: The motor serves as the engine house for the car HVAC system. When it fails as a result of wearing out or extreme usage, the entire system stops working, including the blower. Also, when the climate control module or HVAC control unit fails, it might not send the correct signal to the blower motor, thereby resulting in malfunctioning.
- Faulty Electrical Wiring: A breach in electrical connection, damaged wires, and tripped circuit breaker leads to blower motor failure. This is as a result of its inability to receive necessary power to operate. Also, wiring faults can cause short circuits being run into the blower motor.
- Bad Ground Connections: Proper ground connection is essential for safe operations of the electrical component of the blower motor. When the ground connection is faulty, your blower will not function properly. You can check for a bad ground connection by running a fused jumper from a battery and temporary ground jumper to the power side and other terminal of the blower motor.
- Clogged Air Filter: In the process of receiving air from outside and within the car, the blower might get dirty air that will clog the air filter. This, in turn, makes the blower malfunction over time. If you notice unusual high temperature and noise coming from the blower, you might need to get it checked.
What To Do to Keep The HVAC Blower Running Smoothly
Knowing what can cause a problem and its signs is never enough. It is important to know how to combat those problems and the precautionary measures that can be taken. To keep the BMW HVAC blower at optimal efficiency, put the following process in place.
- Vent cleaning: ensure that the vent through which air is being passed onto the HVAC system, and dashboard is clean to prevent blockage.
- Regular motor check: routine check on your blower motor saves you the stress of having a wear and tear of the blower.
- Electrical connection prompt repair: ensure that electrical connections to the blower motor, fuse and circuit breakers are tightly secure and void of corrosion.
- Blower resistor check: the blower resistor is responsible for controlling the fan speed and when it is not working, there will be a problem. Periodically check it for proper operation and change, if necessary.
- Avoid overworking the HVAC system: like all systems of the car, overworking the HVAC system will make its components stop working efficiently. So, avoid using the blower beyond its designated condition – do not use it at full blast for an extended period of time.
In all, taking your BMW for scheduled routine maintenance checks guarantees you the best option of keeping your HVAC blower running at its best.
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