AC Problem

Discussion in 'Audio + Electronics' started by Daddyar, Oct 8, 2019.

  1. Daddyar

    Daddyar Newbie

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    Not sure this is the right place, but I have an issue with my AC. 1997 Silverado ECSB 5.7. It works, but if there’s a diesel truck nearby, I get their exhaust smell in my cab. I don’t notice any difference when I push in the recirc button. The temp knob, fan speed, and defrost knobs all work as they should. Any ideas?


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  2. RawbDidIt

    RawbDidIt I'm Awesome

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    Are you sure it's not your door seals that are blown? Either that or the cabin air filter?

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  3. Daddyar

    Daddyar Newbie

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    I don’t think my truck has a cabin filter. I doubt it’s the door seals, as it’s only when the AC is on. I also don’t think it’s the control panel as it seems to work fine. The recirc light turns off when switched to defrost.


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  4. df2x4

    df2x4 Domestics only.

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    You're correct, none of these trucks do.
     
  5. east302

    east302 I'm Awesome

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    Does the recirc door actuate? It’s between the blower and firewall, look up from the floor.
     
  6. bugdewde

    bugdewde I'm Awesome

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    I bet the recirc door is not operating correctly.
    Search recirc door on here to see plenty of ideas/fixes.
    Things that come to mind:
    - Door sealing foam bad.
    - Door actuator motor not working.
    - Door actuator arm unhooked/broken.
    - Door actuator may need to "re-learn" it's stop/start position (not sure if that actuator does that... but read that some do).

    Seems to be a common ussue.
     

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