Question about 2007 Ford Mustang GT

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Blower fan cuts off and on at times by itself

At times the heater blower fan will shut off and come back on by itself. I have changed the relay and it still does it.

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  • Laura
    Laura Mar 29, 2014

    Thank you. Have car in shop now but of course now the fan is blowing working and they are having a hard time pinpointing the problem.

  • yadayada
    yadayada Mar 30, 2014

    When it is not working go under the dash and hit it with a hammer handle, if it comes back on you can rest assured the fan motor is defective.

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  • Ford Master
  • 75,822 Answers

I think the problem is with the fan.

Posted on Mar 24, 2014

  • Laura
    Laura Mar 29, 2014

    I am hoping that is the problem but as of now it is blowing again and the shop can not find the problem. Have had it at 3 shops now.

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SOURCE: heater fan not working

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On ford vehicles the blower motor resistors are the most common problem when this happens.

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