A/C Compressor not engaging, any ideas?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by HopeOverMope, Jun 28, 2020.

  1. DUNE-T

    DUNE-T Road Train Member

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    It's to the right in that brown plastic, right where the picture cuts off.
     
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  3. HopeOverMope

    HopeOverMope Road Train Member

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    Oh, ten 4! I’ll have to go look in just a sec.
     
  4. DUNE-T

    DUNE-T Road Train Member

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    You might not have it, just like on this pic, then your problem might be somewhere else
    Screenshot_20200628-193255_Chrome.jpg
     
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  5. HopeOverMope

    HopeOverMope Road Train Member

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    Ten4. Doesn’t look like I do. I have this big Volvo 24v box, but I doubt that’s it? F6551020-9973-46D9-A32A-C61BE0DB5B83.jpeg 7D3E62C9-E734-404F-B6F4-8BC171877473.jpeg 90F9947D-C8A3-46A6-81C3-2D3213C25197.jpeg
     
  6. AModelCat

    AModelCat Road Train Member

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    You'd need an A/C gauge manifold. Typically speaking, a properly charged R134a system should have about 70 PSI on both sides of the system at around 70°F. If the refrigerant leaks out, the static pressure drops. There are pressure switches in the system. If static pressure is too low, the switches stay open and prevent the A/C clutch from getting power.
     
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  7. HopeOverMope

    HopeOverMope Road Train Member

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    You know, that makes a lot of sense.
     
  8. HopeOverMope

    HopeOverMope Road Train Member

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    I think I’ll go get that checked out tomorrow. I don’t know why I forgot that part! I just figured if power wasn’t getting to the compressor that it might have been switch related in the cab. Thanks
     
  9. DUNE-T

    DUNE-T Road Train Member

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    This is what I have
    20200629_061536.jpg
     
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  10. HopeOverMope

    HopeOverMope Road Train Member

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  11. HopeOverMope

    HopeOverMope Road Train Member

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    Update: well, I went to one of my local shops that have an evac machine. Almost 0 Freon. While doing the evacuation, I heard and found the leak. A $300 hose goes on tomorrow lol. It’s a S piece metal with a flange that hooks directly to the compressor, has a low pressure port on it, then about 3 or so foot of line with a spinning nut built into it. So I was thinking $150 or so but... It’s kind of nice though when you find the leak so fast.
     
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