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99 Yukon AC Blower & HVAC Panel Not Working

Discussion in 'Interior' started by McDermut, May 14, 2020.

  1. McDermut

    McDermut TYF Newbie

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    Location:
    Lone Star State
    Name:
    Alex
    It did. I replaced the blower motor and blower motor resistor which has solved my HVAC problems. For my truck when you have the blower on max with both the AC and cabin circulation buttons pushed the flap behind the blower motor opens which makes the motor more audible. When you switch the blower dial down or push off the cabin circulation button the flap closes some or completely and the sound goes down some. The flap is used in cabin air circulation and for my year and make has no cabin filter, others may be different.
     
    mrtahoe42 likes this.
  2. east302

    east302 Full Access Member

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    Name:
    east302
    Remove the blower and use a mirror to look up through the air intake. There’s a screw there that can let water leak in and it’s a straight shot to the blower. Have someone run a hose on the lower windshield and see if water comes in there.

    Any new blower will eventually seize if the leak isn’t fixed.

    Not the best picture, but the screw is here. It threads into the blower intake. Remove it, goober it up with silicone or RTV and reinstall.

    [​IMG]
     
    McDermut and PNW VietVet like this.

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