How to Bypass a Blower Motor Resistor: A Step-by-Step Guide

To bypass a blower motor resistor, remove the resistor and connect the blower motor to the power source. Bypassing the resistor should only be done as a temporary solution and not as a permanent fix.

If your car’s fan is not working at all speeds, it is likely that the blower motor resistor needs to be replaced. However, if you need a quick fix and want to bypass the resistor, there are a few steps to follow. Bypassing the resistor involves directly connecting the blower motor to the power source, allowing it to operate at full speed.

Although this is not a recommended solution, it can help you keep your car cool while you make arrangements to replace the resistor. In this article, we will guide you through the steps to bypass a blower motor resistor.

How to Bypass a Blower Motor Resistor: A Step-by-Step Guide


Understanding Blower Motor Resistor

A blower motor resistor is a crucial component in the hvac system that manages the speed of the blower motor. It is an electrical resistor that reduces the voltage to the motor and regulates the airflow into the vehicle’s cabin.

A faulty blower motor resistor can cause several symptoms, including the blower motor running continuously or not functioning at all. Additionally, the resistor can overheat and subsequently damage the wiring or the blower motor itself. If you notice any of these indications, it’s essential to get the blower motor resistor examined by a professional.

It’s crucial to comprehend the functions and symptoms of a blower motor resistor to bypass or repair the part and maintain your car’s hvac system running efficiently.

Diagnosing A Failing Blower Motor Resistor

Diagnosing a failing blower motor resistor can be tricky. Follow these steps to check the resistor and determine if it needs to be bypassed. First, use a multimeter to test the resistance of the resistor. Next, visually inspect the resistor for signs of failure such as melted plastic or damaged wiring.

Finally, consider the common causes of blower motor resistor failure, such as regular wear and tear or electrical issues. By diagnosing the issue and following these steps to bypass the resistor, you can keep your blower motor functioning properly. Remember to always take safety precautions when working on your car’s electrical system.

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Bypassing A Blower Motor Resistor

Bypassing a blower motor resistor can be the solution to various hvac issues. Bypassing involves wiring the motor directly to its power source, bypassing the resistor. It’s a simple process that doesn’t take much time. Here is a step-by-step guide for bypassing blower motor resistor: first, find the resistor in the hvac system.

Disconnect the power source. Then, remove the resistor from the system, and connect the wires directly to the motor. Although the process is easy, it comes with risks, such as overloading the motor. Bypassing the resistor also has benefits like saving money and energy.

Overall, it’s a quick solution to hvac issues that requires minimal skills and effort.

Replacing A Blower Motor Resistor

The blower motor resistor in your car is a crucial component that controls the fan’s speed. When it fails, your fan either won’t work or will function only at one speed. If this occurs, you’ll need to replace the resistor.

The process is relatively simple and may be accomplished on your own or with the help of a professional.

The first step is to determine if the resistor is truly broken. Next, purchase a new one and store all necessary tools.

Replacing the resistor is as easy as locating it within the car and removing the old unit. Insert the new resistor and secure it in place.

Finally, be sure to test the fan and ensure it’s operating correctly. Remember to follow best practices and consult a professional if necessary.


As you have learned, bypassing a blower motor resistor may sound challenging, but it is certainly doable with the right tools and knowledge. Remember to exercise caution and follow the steps outlined in this post. Keep in mind that this is a temporary solution, and it is essential to replace the faulty resistor as soon as possible for the safety of yourself and your vehicle.

Learning how to bypass a blower motor resistor can save you money and time, and it’s a valuable skill to have in your toolkit. Keep your car running smoothly, and don’t forget to consult a professional if you have any doubts or concerns.

Thanks for reading, and happy repairing!