Quick Answer: Can You Bypass a Blower Motor Resistor

Have you ever encountered a situation when you're in a car and want to turn on the air conditioning, but you find that the switch is not working. No matter how you raise the thermostat, it doesn't bring cool air.

I hope that you never encounter such a situation, as it can be quite frustrating. If you have faced this issue, it might be worth considering: can you bypass a blower motor resistor? Well, the answer is yes!

Part 1: What Is a Blower Motor Resistor

The blower motor resistor is the component of the blower motor that controls the speed.

It can generate electronic pulses in response to the information entered into the adjustment dial. The electrical signal increases or decreases, affecting the fan's overall motor speed. 

When you turn up the thermostat on your air conditioner, the resistor signals the blower motor to speed up and blow more air. Turning it down has the opposite effect. 

Electrical systems are quite straightforward, but if the flow of electricity is interrupted, issues can arise.

Part 2: Will A Blower Motor Work Without The Resistor

The blower motor can indeed function without the resistor.

As we know, the resistor is responsible for controlling the blower motor's speed by regulating the voltage supplied to it.

It will turn out that without the resistor, the blower motor may run at maximum speed or not function as expected. 

Part 3: Can You Bypass A Blower Motor Resistor

The answer is yes.

When the resistor is bypassed, the blower motor will receive a constant power supply, allowing it to operate at its maximum speed. However, please note that bypassing the resistor eliminates the ability to control the blower motor's speed effectively.

Bypassing the resistor involves directly connecting the power source to the blower motor, bypassing the resistor's control circuit. Therefore, bypassing the blower motor resistor should be done carefully and with a good understanding of the electrical system in your specific vehicle. 

Below are the specific detailed steps, please follow the instructions.

Part 4: How to Bypass Blower Motor Resistor

Here are 3 steps you can follow to bypass blower motor resistor.

<1> Locate the Blower Motor Resistor

It is usually located beneath the passenger side dash or in the engine compartment. It is near the blower motor and is distinguished by its rectangular form. 

 

<2> Remove the Blower Motor Resistor

Disconnect all of the components surrounding the blower motor resistor, including the AC pigtail and cooling duct.

Using a ratchet, remove the bolts holding the blower motor resistor in place. The blower motor resistor can be removed after the bolts have been removed. 

 

<3> Install a Bypass Wire

The wire should be linked to the blower motor's positive terminal, and the negative terminal should be attached to the blower motor's negative terminal. This will turn off the resistor and allow the blower motor to run at full speed.

After the bypass wire has been attached, the bypass must be tested. If the fan is spinning at maximum speed, the bypass is successful. If not, the connections should be checked and modified as needed.

 

Part 5: Unable to Bypass A Blower Motor Resister? Here Is How to Fix

Of course, not everyone can succeed. If the bypass does not appear to be working properly, there are 2 methods that can be taken to troubleshoot the problem. 

Method 1: The first step is to double-check the connections to ensure that they are all connected properly.

If the connections are in place, then the next step is to check the fuse. If the fuse is blown, then it will need to be replaced in order to restore power to the blower motor.

 

Method 2: If the bypass still does not work, the blower motor resistor may need to be replaced.

This is accomplished by removing the old resistor and replacing it with a new one. It is critical to ensure that the replacement resistor is the same size and type as the old one to ensure an appropriate fit.

Part 6: How to Buy A Blower Motor Resister? Try Chipsmall

Chipsmall Limited consists of a professional team with an average of over 20 years of expertise in the distribution of electronic components. 

With the principle of "Quality Parts, Customers Priority, Honest Operation, and Considerate Service", our business mainly focuses on the distribution of electronic components. 

The main products comprise ICs, resistors, capacitors, modules, potentiometers, IC sockets, relays, connectors, and so on. 

To find the resistors you need in Chipsmall: https://www.chipsmall.com/BigCategory/resistors.html

The End

Bypassing a blower motor resistor is not difficult. So, back to our question of whether can you bypass a blower motor resistor? I believe that you have already found the answer in this post.