Coolant Fan Switch
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Coolant Fan Switch Coolant Fan Switch
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CARQUEST by Intermotor Coolant Fan Switch

Part No. TFS644 Warranty Details  

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CARQUEST by Intermotor is a complete engine management import line that includes ignition and electrical relays, switches and sensors with a concentration on high technology categories such as computerized engine controls, fuel injection, and emission controls with coverage for every part number with an import nameplate. Intermotor parts are unrivalled for quality, original fit, form, function, and coverage providing a genuine import part in every box. Intermotor is the import leader by design.

Product Features:
  • In design, we specify custom wax formulations that will expand when heated, activate a snap action electrical contact and transfer the electrical signal to the fan controller
  • In manufacture, we custom form the wax pellets for different temperature range specifications. All units are calibrated & tested to confirm switch actuation at their specified temperature
  • The switch is designed using a formed bimetallic contact arm. The bimetal contact movement is achieved using the different expansion rates of two metals fused together. This is a creep action device, provides precise performance
  • In production, all thermal switches are factory-calibrated to make electrical contact at the specified lower-temperature set point
  • Our switches feature a robust design with high grade materials to meet the stringent demands of today's service professional
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Connector Gender:Female


by PowerReviews
BWD/IntermotorEngine Coolant Temperature Switch

(based on 1 review)

Ratings Distribution

  • 5 Stars



  • 4 Stars



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  • 2 Stars



  • 1 Stars



Reviewed by 1 customer

Displaying review 1

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(6 of 12 customers found this review helpful)


Hard to find. Advance Auto Parts had it.


from Raleigh, NC

About Me Auto Enthusiast

Verified Buyer
Level 2


  • Easy To Use


    Best Uses

    • Small Cars

    Comments about BWD/Intermotor Engine Coolant Temperature Switch:

    Car is no fun when this thing doesn't work. Overheats in bumper to bumper traffic.

    • Was this a gift?:
    • No

    Comment on this review(earn points)

    Do you have questions about this product?(earn points for answers!)


    Ask a question, get answers from real customers and in-house experts. Or contact Customer Care by email or call 1-877-238-2623.

    2 Questions | 3 Answers
    Displaying questions 1-2
    • Q:

      is this switch located behind the motor?
      Asked on 8/25/2014 by James

      1 answer



        Hi James, to further assist with the engine coolant temperature switch, please provide us the year, make, model and engine size of your vehicle.

        Answered on 8/27/2014 by Steve from AAP
    • Q:

      were is switch at
      Asked on 5/29/2010 by Anonymous

      2 answers



        For further assistance, can you provide the year, make, model and engine size of the vehicle in question.

        Answered on 5/31/2010 by Mike from AAP
      • A:

        this are located under the battery side .. to unplug is little be hard and tie ..

        Answered on 8/20/2010 by larry from georgia
    Displaying questions 1-2

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    Disclaimer We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.