Question about 1994 Buick Roadmaster

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I have a 1994 roadmaster wagon,the cooling fans did not go on when the temp gauge went to hot,I replaced the coolant temp switch buy the water pump.That did not work,but when I unpluged the switch with the car running,the fans went on.Can you tell me if there's another sending unit or relay I can try?

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  • dominicfaust Oct 15, 2010

    The temperture gauge sending unit,do you mean the temp gauge itself,have that tested?

  • dominicfaust Oct 15, 2010

    Thanks. If that's not it ,can I contact you again,or will they charge me again?

  • dominicfaust Oct 18, 2010

    That was it,thanks

  • dominicfaust Oct 18, 2010

    it was the temp gauge switch. Thanks

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Hi,

You need to check the temperature range of the sender unit it's value may have been higher then what you replaced.

When you disconnect the plug from the switch an the fans are going it shows that all the other components of the system are working fine it's just the sender unit itself.

Run the vehicle for 10mins until the temp gauge comes up to operating temperature if the fans don't switch on and the gauge is still raising it maybe the temperature gauge sender maybe faulty, get this tested.

Hope this helps, let me know if you need more information.

Thanks

Jason

Posted on Oct 15, 2010

  • Jason Maurirere
    Jason Maurirere Oct 15, 2010

    No,
    you have another temperature sender unit which is just for the gauge you will find this one just by the starter motor.

    Have that tested, an see if it is faulty.

  • Jason Maurirere
    Jason Maurirere Oct 15, 2010

    Yep just come back into this same problem and I'll receive the message.

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