Blower Motor: Necessary Information For Car Owners!

When you turn on the air conditioner or heater in your car, the fan comes on and the air starts to flow from the vents. It is that motor that runs the fan is known as the blower motor. It is located inside the dashboard, often on the opposite side of the steering wheel or inside the compartment of the engine on the firewall.

In the modern vehicles, the blower motor’s speed can be adjusted steadily. The electric module that regulates the hustle of the blower motor is known as the blower motor control module.
In some of the cars, the blower motor has only 4 or 5 fixed speeds. In this case, the blower motor’s speed is regulated by the blower motor resistor.

Problems faced by blower motor relay or resistor

Issues with a blower motor relay are common in most of the cars. The most common signs of a failed blower motor are when the heater fan only works at high speed and not at the low speed.
In some of the cars, a failed blower motor relay can cause a heater fan to stop functioning completely. In the majority of the cases, a blower motor relay fails because of overheating or corrosion.

At times, the mechanical resistance to the rotation of the motor can lead to excessive power that can scorch and hastily damage the relay of the blower motor. For instance, when the fan blade gets jammed by the foreign objects or when the bearings of the motor are worn out.
Is there any way to diagnose the blower motor relay?

Before pulling into the parking of your local junkyards and spending a lot of time looking for the auto parts, you can go for a visual inspection of the resistor to find the issue. The blower motor relay fails mostly because of corrosion.

If the relay does not display any visual damage, the resistance between the terminals should be checked and compared to the specifications. If the resistance is out of specs then the resistor should be replaced with the used OEM blower motor that can be bought from the used OEM parts sites.

How do I test the blower motor?

If the blower motor fails to function at all then the blower motor should be checked first. Usually, it is done by gauging the power at the blower motor connector when it has been turned on.

Getting used blower motor online

Buying the new blower motor doesn’t make much sense when you can buy used OEM blower motor that functions the same as the new one. Plus it will be available at the most affordable prices that online used auto parts sites offer to their customers.

Also, the OEM parts bought online brings with them more advantage than low price, some of which are free shipping, quality test, warranty and professional advice on how to keep the used car parts working to their optimal use for the longest time.  

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