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  1. Join Date
    Nov 2008
    Posts
    70
    #1
    Need help identifying what causes the vibrating/knocking sound behind AC vents.

    After a mins na AC was turned on, you'll hear the noise, and once pinatay ang AC mawawala din yung noise

    TIA

  2. Join Date
    Feb 2009
    Posts
    5,130
    #2
    Quote Originally Posted by CoolSwitch View Post
    Need help identifying what causes the vibrating/knocking sound behind AC vents.

    After a mins na AC was turned on, you'll hear the noise, and once pinatay ang AC mawawala din yung noise

    TIA



    might be FOD (foreign object debris) or a thermistor that came loose from the mounting and oscillating. vehicle make, model, year, mileage, last thing done to it prior to the symptoms?

  3. Join Date
    Nov 2008
    Posts
    70
    #3
    Toyota Corolla 94

    last thing done:
    -just had the AC cleaned, and hinang daw sa evaporator (may tama daw kaya may tagas)

  4. Join Date
    Mar 2008
    Posts
    34
    #4
    Ipasilip or ipadinig mo sa gumawa dati baka under warranty pa at wala naman charge.

  5. Join Date
    Oct 2010
    Posts
    877
    #5
    kung may tagas evaporator mo wala ng freon kinabukasan

Tags for this Thread

Knocking/Vibrating noise behind AC vents