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2019 toyota tundra air conditioner

Discussion in '2.5 Gen Tundras (2014-2021)' started by rayg1022, Mar 31, 2020.

  1. Mar 31, 2020 at 5:16 PM
    #1
    rayg1022

    rayg1022 [OP] New Member

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    I have a 2019 toyota tundra with 8,000 miles on it, and due to this coronavirus it has been sitting a couple days. But today I went to the store and after starting it I turned on the A/C and seemed to make a loud noise like the unit for the AC under the hood, after I shut the AC off and turned it back on it didn't do it. Is that normal for this vehicle?
     
  2. Mar 31, 2020 at 5:21 PM
    #2
    Jim LE 1301

    Jim LE 1301 Camaro Lover, SSEM # 11,TTC#179

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    Welcome from NY.

    Could it have been the ABS self check?
    Maybe a animal stored something under the hood?

    Hopefully you will figure it out, if not bring it back to the dealer it's under warranty.
     
  3. Mar 31, 2020 at 5:29 PM
    #3
    rayg1022

    rayg1022 [OP] New Member

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    No animals around here it sounded like the compressor but don't know if it was caused from sitting a couple days etc.
     
  4. Mar 31, 2020 at 7:25 PM
    #4
    Genuine Cooling Systems

    Genuine Cooling Systems New Member Vendor

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    Completely normal. All tundra do that. Same with tacomas. My 2017 Tacoma did it after it sat.
     
    Last edited: Mar 31, 2020
  5. Apr 1, 2020 at 8:47 AM
    #5
    rayg1022

    rayg1022 [OP] New Member

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    Even a brand new one with 8000 miles on it? What's the reason?
     
  6. Apr 1, 2020 at 10:24 AM
    #6
    Genuine Cooling Systems

    Genuine Cooling Systems New Member Vendor

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  7. Apr 1, 2020 at 10:26 AM
    #7
    Genuine Cooling Systems

    Genuine Cooling Systems New Member Vendor

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    This is what I learned...
    It's normal (but not exactly ideal). After your a/c system sits unused for a period of time, some of the oil will pool on the input side of the compressor along with some refrigerant that condenses and liquifies. When you first start the compressor after it's sat overnight, this little pool of liquid gets thrown into the compressor. As you may know, liquids don't compress so it causes a strain on the compressor veins as it passes through, making this clunk. Older vehicles were designed with a small reservoir just before the compressor to eliminate this problem, but many manufacturers don't do this anymore as they feel it's an unnecessary added cost.

    If you want to avoid this thunk, drive for a while before turning on the a/c to let the engine bay heat up which will cause this little pocket of cooled and condensed liquid to heat up and evaporate.
     
    Jernik and Kevmo like this.

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