Fan control only working on low and high

Discussion in 'Interior' started by Eyedoc17, Apr 21, 2018.

  1. Eyedoc17

    Eyedoc17 Junior Member

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    I replaced a head unit in my 2007 f150 super crew and the harness to the fan control knob disconnected in the process. Once I put everything back together, the a/c runs low on 1-3 setting and high on 4. Did I do something wrong in the reconnection? Is there a process to that instead of just plugging it back in?


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  2. Roush PSD Interceptor

    Roush PSD Interceptor Straight Piped Diesel Staff Member

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    The fan motor plug has several wires going into it.
    Make sure none of the pins were crossed plugging it back in.

    If everything checks out with the blower motor fan wire control
    plug in then that sounds like the blower motor fan resistor
    went bad but not likely since it worked before head unit install.

    Try disconnecting the battery 10 minutes anyway
    incase it was some wierd power glitch.


    If that doesn't cure it, and all pins of the blower motor control
    are inserted properly into their prospective slots, go for the
    blower motor fan resistor fix.
     
  3. Eyedoc17

    Eyedoc17 Junior Member

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    Incredible info! Thanks so much for the response! I’ll follow up with results


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  4. Roush PSD Interceptor

    Roush PSD Interceptor Straight Piped Diesel Staff Member

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  5. Eyedoc17

    Eyedoc17 Junior Member

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    It was a stupid mistake. Top part of the connector was not fully snapped in. Works as usual now. Thanks for your help


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