Question about 2009 Ford Flex

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Radiator fan relays - 2009 Ford Flex

Posted by Thomas Jaycox on

  •  Stephen
    Stephen Jun 23, 2012

    What is your question ?

  • Thomas Jaycox
    Thomas Jaycox Jun 24, 2012

    Ok, here's the deal. The radiator fans on my 2009 Flex don't seem to be working, but do work off and on, because I can hear them come on, so the motors must be fine. I'm thinking it could be the AC pressure switch, a fan relay, or even the brains...but I don't know how to narrow down the problem. Mechanics want to shotgun blast with a whole new assembly, but why if the motors still work?

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Stephen

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  • Ford Master
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You need a book. The fans come on when the pressure switch sends a signal to the BCM to energize the fan relays. If the freon charge is low the ac system won't build up enough high pressure to activate the fans. If the pressure switch is bad the computer won't know the pressure is high enough to need the fans. And so on.

Posted on Jun 24, 2012

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