Question about 1991 Acura Legend

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91 Legend cooling fan turns on by itself

The cooling fan will turn on randomly with the engine off. Sometimes in the middle of the night it will start and run until the battery is dead.
Any ideas what might cause this?

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  • dturnbow Mar 21, 2009

    i have a 91 integra and the cooling fan will come on 12 hours after the car has been ran, and recently i have noticed it has come on and stayed on til the point it drains my battery, i am thinking it is the cooling fan control module a.k.a. timer raditor fan delay unit am i right

  • Anonymous Mar 12, 2014

    Will fan stop running? Has been running for almost 2 hrs since engine was turned off. Can I drive it to a repair shop in the morning?

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Replace the cooling fan engine temp sensor switch, this may be the cause.

Posted on Nov 19, 2008

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Good place to start is the temp. sending unit that turns the fan on and off, usually located in or near the bottom of the radiator. On many cars, the is is how the system works, but only until the engine cools down, and it should never run the battery down. I suspect the temperature sending unit is shorting out.
Bill

Posted on Nov 19, 2008

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