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Importance of the Blower Final Stage Fan Resistor in Your BMW

Owning a BMW is a luxury, and there are certain expectations of performance and quality of the brand. The level of performance exceeds the standard and provides you with a smooth and enjoyable ride very time. The sleek exterior matches the carefully-designed interior so you can ride in safety and comfort. However, As your BMW gets older and gathers more mileage, it is going to need routine care and maintenance.

BMW Blower Final Stage Fan Resistor

One of the components that may need repair is the blower final stage fan resistor. In this article, you will find information as to what this piece is in regards to your HVAC and also some signs that will indicate failure.

What is a blower final stage fan resistor?

The blower final stage fan resistor also goes by the name of the blower motor resistor. This component is an electrical part responsible for providing the voltage to the fan that controls the heating and air conditioning in your BMW.

You can find a blower motor resistor in BMWs that have 4 or 5 fixed speeds. In newer models of BMW, the blower motor resistor will be installed in the HVAC system, that way it can be cooled down when air is passing through it. This will prevent the blower motor resistor from overheating.

The blower final stage fan resistor is constantly functioning and changing speeds, dependent upon how often you are turning the knob to make the interior of your BMW cooler or warmer. This causes the fan to speed up or slow down. All of that constant work can cause it to wear out a lot quicker than other parts of you BMW. You will not want to be stuck on a hot summer day or a cold winter night and not be able to blow the correct air temperature or any air at all. Now that you know its function, let’s look at some signs of blower motor resistor failure.

Symptoms of a Failing Blower Final Stage Fan Resistor

One of the most common issues that can occur with the blower final stage fan resistor is that it gets stuck on one speed. The blower resistor is the component that is directly responsible for controlling the speed of the fan. So if the blower resistor fails, then the fan speed can get stuck at one speed. When this happens, it is still possible for the air to continue to blow, it just will not change when you go to turn the knob on your BMW. At this point, the blower motor resistor will need to be replaced in order for it to work properly again.

Another sign that the blower final stage fan resistor is beginning to fail is that there is no air coming from the ventilation at all. This is the second outcome if the the blower motor resistor does not work. This will be due to the fact that there is no longer an electrical current flowing through the mechanism so there will be no pressure to send the air through.

Servicing Your BMW

Keeping up with the proper maintenance of your BMW is very important. This will allow for your BMW to continue to perform at the high standard that you are used to. The blower final stage fan resistor is one of those parts that will contribute to the comfort you feel as you drive. If this component breaks down or beings to fail, then you will want to take it in for servicing.

BMW Blower Final Stage Fan Resistor Repair

At Ultimate Bimmer Service, we strive to provide complete satisfaction for all your BMW needs. We are centrally located to serve customers in Carrolton and Dallas, TX and are always available to take a look at your BMW if you are experiencing any issues with the blower final stage fan resistor.

One of our certified technicians will use the most current and up to date diagnostic tools to determine the exact cause of your BMW’s issue. Once the problem has been determined, we will use top quality replacement parts without charging the dealership prices. We will work to your satisfaction and have your driving safely and soundly in no time.

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