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Why does my air conditioner howl?

Discussion in 'Experienced Truckers' Advice' started by A Bug, Jan 1, 2019.

  1. Jan 1, 2019 #1
    A Bug

    A Bug Heavy Load Member

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    Mar 15, 2014
    Sevierville TN
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    I will be fast asleep at a truckstop for five or so hours with the engine idling to keep it warm inside. Then comes the howl. Shrieking noise loud as my airhorn coming from the ac. When I turn the air off the noise stops.

    I hate waking up like that, I am sure the other truckers around me hate it even more.
     
    A Bug, Jan 1, 2019
    A Bug, Jan 1, 2019
    #1
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  3. Jan 1, 2019 #2
    blairandgretchen

    blairandgretchen Road Train Member

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    Dec 9, 2011
    South west Missouri
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    Ghooooooooooooosts.
     
    blairandgretchen, Jan 1, 2019
    blairandgretchen, Jan 1, 2019
    #2
    Texas_hwy_287, thelushlarry, Sirscrapntruckalot and 4 others Thank this.
  4. Jan 1, 2019 #3
    kemosabi49

    kemosabi49 Trucker Forum STAFF Staff Member

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    You are running your truck to keep warm with the air conditioner on??
     
    kemosabi49, Jan 1, 2019
    kemosabi49, Jan 1, 2019
    #3
    magoo68 and Woodys Thank this.
  5. Jan 1, 2019 #4
    A Bug

    A Bug Heavy Load Member

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    Mar 15, 2014
    Sevierville TN
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    I turn the first dial to max ac in order to avoid taking in air from the outside, it just recirculates the inside air.

    My other dial has a red and blue section indicating hot and cold. I turn the dial to the red side to make the temperature go up.
     
    A Bug, Jan 1, 2019
    A Bug, Jan 1, 2019
    #4
  7. Jan 1, 2019 #5
    STexan

    STexan Road Train Member

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    Oct 3, 2011
    Longview, TX
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    "Coming from the AC"? You mean as if coming through the dash or from under the hood as the compressor engages (Defroster on) and maybe the belt slips?

    But I suspect the bearing on the blower motor shaft is going out or the fan is rubbing inside the fan cage due to being worn out or something broken or cracked inside the blower system.
     
    Last edited: Jan 1, 2019
    STexan, Jan 1, 2019
    STexan, Jan 1, 2019
    #5
    BUMBACLADWAR, x1Heavy, Lepton1 and 1 other person Thank this.
  8. Jan 2, 2019 #6
    x1Heavy

    x1Heavy Road Train Member

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    White County, Arkansas
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    I think somewhere you are hurting the truck. You have to have fresh air. You wont believe how bad air gets in that cab if you do not remove the gases you exhale through the night. It will make you wake up feeling poorly sometimes.

    Remember a big truck cab will leak in gases all over from outside. It is NOT a true military term NBC sealed. Anything will get into to you inside that truck cab. You cannot keep it out.
     
    x1Heavy, Jan 2, 2019
    x1Heavy, Jan 2, 2019
    #6
    mitmaks Thanks this.
  9. Jan 2, 2019 #7
    mitmaks

    mitmaks Road Train Member

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    Get bunk heater and stop idling
     
    mitmaks, Jan 2, 2019
    mitmaks, Jan 2, 2019
    #7
  10. Jan 2, 2019 #8
    thelushlarry

    thelushlarry Road Train Member

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    Jan 9, 2012
    glasgow ky
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    Or Gremlins!
     
    thelushlarry, Jan 2, 2019
    thelushlarry, Jan 2, 2019
    #8
  11. Jan 2, 2019 #9
    Jazz1

    Jazz1 Road Train Member

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    Thunder Bay On
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    It howls? Mine moans like a cheap date.
     
    Jazz1, Jan 2, 2019
    Jazz1, Jan 2, 2019
    #9
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