REPLACE EVERYTHING AC STILL NOT WORKING :(

Discussion in 'Questions From New Drivers' started by Backendboyz, Aug 9, 2023.

  1. Backendboyz

    Backendboyz Bobtail Member

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    Hey I have a 2019 Peterbilt 579

    I replaced the relays , ac compressor, and drain system and recharged Freon

    every time I take to someone they say their is no leaks… and just put more Freon

    I pay them $3-500 just to add a lil Freon and they say it’s nothing wrong w my truck

    then I leave my ac blows cold as ever for a day and then the next day after driving for a minute my ac stops working again

    does anyone have any advice
     
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  3. ‘Olhand

    ‘Olhand Cantankerous Crusty

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    Everything you’ve mentioned...points to a leak somewhere in the system
     
  4. Ridgeline

    Ridgeline Road Train Member

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    see my reply in the owner's section.
     
  5. Moose1958

    Moose1958 Road Train Member

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    Allow me to tell a story about my old 1995 Chevy S-10 pickup. After I bought it I started to notice the AC was not working right. Several compressors later I did some checking and was told most likely there was small metal trash in the system being trapped in the condenser after something failed big time in the system. These small metal parts over time were ripping apart the seals in the compressor. I finally had to take my pickup to a mechanic and he replaced the condenser as well as all the parts under the hood. After he did that repair I never had any further issues with that AC. The day I signed the title over that AC was still working very well.

    The basic systems are the same. My guess is you have a leak in the compressor. Next time you put freon in the system get them to also add dye. Trust me, you will find the leak!
     
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  6. BennysPennys

    BennysPennys Road Train Member

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    What moose says -definitely do the dye test.
     
    Last edited: Aug 9, 2023
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  7. mitrucker

    mitrucker Road Train Member

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    Dye should’ve been added with the first shotnof freon. Where do they find these “mechanics” these days?
     
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  8. ‘Olhand

    ‘Olhand Cantankerous Crusty

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    Same schools they find today’s so called drivers
     
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  9. tscottme

    tscottme Road Train Member

    There's a "mechanic shortage" just like a "truck driver shortage", just ask the mechanic schools. ;-)
     
    mitrucker Thanks this.
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