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Summary
  • You can usually find the resistor under the device it controls. Some models put the resistor in one of the HVAC system’s ducts.
  • The blower motor resistor controls the airflow from the HVAC ducts.
  • If the blower motor resistor is placed under the blower motor, you can access it by removing the glove compartment.

Q: Where is the Blower Motor Resistor Typically Located?

A: Not every vehicle puts its blower motor resistor in the same place, but the part is usually near the blower motor. In many vehicle models, you can find the resistor under the device it controls.

More modern models put the resistor in one of the HVAC system’s ducts, while some older vehicles install the part on the firewall and provide access from under the hood. Another potential location is over the gas pedal on the driver’s side of the footwell.

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The blower motor resistor of the 2005 Toyota Tacoma is on the firewall to the left of the motor. In the 2008-2011 Ford F-150, the resistor sits behind the glove compartment on the air duct’s right side.

blower resistor mounted in the air duct on a 90s vintage gm car
This is a photo of the blower resistor as it is mounted in the air duct on a ‘90s vintage GM vehicle. | Image Source: Richard McCuistian

The blower motor resistor controls the airflow from the HVAC ducts of older vehicles. When you turn the blower fan speed knob to change the setting, you direct the electric current through a path with different resistance. Lower speed settings have more resistance and reduce the power that reaches the blower motor, thus reducing the fan speed. Conversely, higher speed settings have less resistance, supplying the motor with more power and producing more airflow.

diagram showing the location of the blower motor resistor in a mazda tribute
A diagram showing the location of the blower motor resistor in a Mazda Tribute. | Image Source: Richard McCuistian

Tips on How to Access the Blower Motor Resistor

Is the blower motor resistor placed under the blower motor? You can usually access it by removing the glove compartment.

In vehicles that put the blower motor resistor near the firewall, you might need to open an access panel or flap to reach the part.

About The Authors
Written By Automotive and Tech Writers

The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by CarParts.com's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.

Reviewed By Technical Reviewer at CarParts.com

Richard McCuistian has worked for nearly 50 years in the automotive field as a professional technician, an instructor, and a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others. Richard is ASE certified for more than 30 years in 10 categories, including L1 Advanced Engine Performance and Light Vehicle Diesel.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.

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