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    Working on 1990 buick park avenue raditor fans. fboth fan run when hooked up direct to the battery

    checked fuse, new temp sending unit, thermostat is working, The car over heats then shuts down. Once it has cooled it starts and runs fine. Is there more than one temp sensor for this car?

    0  Views: 722 Answers: 3 Posted: 11 years ago
    potaohead

    The car over heats and shuts down. Once it
    has cooled it starts and runs fine.
    potaohead

    Is there more than one temp sensor for this car?

    3 Answers

    You might try connecting one of the fans to a "Key On" wire, to see if the cooling system is working,


    There may be a problem in the microprocessor, that is resulting in it not getting a proper one to five volt temperature signal reading from the coolant temperature.


    If that works, you will need to go to a dealer to have the cause computer analyzed and the fault correct


    It is never a good idea to keep buying and replacing expensive parts, hoping to find a problem.


     

    Is the coolant actually overheating?


    The fans are not designed to run until the coolant  reaches a preset temperature, generally around 230 F.  At that point they should come on.


    Use an ohmmeter to determine if the temperature sender is closing when the engine temperature Guage is reading above average. WBMS


     


     

    .



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