Max AC works Intermittently

Discussion in '2017 - 2022 Ford F250+ Super Duty Forum' started by Elgato, Sep 5, 2022.

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  1. Elgato

    Hello Guys,

    2017 F250 XLT. The Max AC works about 1 out of 8 or 9 times I go somewhere. Additionally, when the Max is blowing it is ICE cold but the other 7 or 8 times the regular AC is blowing it feels like it needs freon (and maybe even a little humid, not sure).

    I haven't been able to figure out any other pattern. I live in Houston and September might as well be July so any help is appreciated.
     
    Elgato, Sep 5, 2022
    #1
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  2. Preston

    check the lines to see if there kinked or broken
     
    Preston, Sep 6, 2022
    #2

  3. FTZ HAIC Staff Member Oregon Chapter Founding Member

    It can't need Freon since every car or truck sold new in the USA since 1996 has used R-134a. :hello1:

    With the hood up, let it run with the AC. If the compressor isn't cycling, let us know. It could be a relay, clutch issue that can sometimes be fixed with a shim, or lose wire.

    If the compressor cycles continously on/off instead of the normal slow on/off, that's usually a sign its low on refrigurant.

    It could also be the blend door, causing cool air to pass through the heater core. The A/C switch uses vacuum lines to determine where the air flows, check all that for vacuum leaks.
     
    FTZ HAIC, Sep 7, 2022
    #3
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