02 Yukon A/C charge question

Discussion in 'Interior' started by Sanjoro, Jul 8, 2018.

  1. Sanjoro

    Sanjoro TYF Newbie

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    Bought my Yukon a few weeks ago and noticed the ac is warm sometimes at idle and randomly when driving on the highway, it looks like it's overcharged to me and I figured I would ask so see if this was normal for these trucks. ambient temp was around 90 to 100
    IMG_20180702_144846.jpg
     
  2. swathdiver

    swathdiver Full Access Member

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  3. OneofFew

    OneofFew Full Access Member

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    I am a certified A/C man. is that the reading with the compressor engaged? It doesn't look like it.
     
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  4. Sanjoro

    Sanjoro TYF Newbie

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    Yes the ac was running on max and it was slightly cold inside the cab
     
  5. about20ninj45

    about20ninj45 Full Access Member

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    With the system on, see if the clutch is engaged while the compressor is spinning.
     
  6. Sanjoro

    Sanjoro TYF Newbie

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    The compressor is working I have cold air at times but the temperature fluctuates a lot and I want to know if this looks like an overcharged system the clutch is engaged and the engine is at idle with the ac on max the low side is reading 65psi
     
  7. about20ninj45

    about20ninj45 Full Access Member

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    The low side , if I remember correctly, is supposed to be between 25-30 around 90* ambient temps, and high side should be twice the low plus 40 or somewhere around that
     
  8. OneofFew

    OneofFew Full Access Member

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    I would really be interested in seeing the high side pressure, beyond that all we could do here is speculate, but if the compressor is staying on, not cycling and you are getting that reading with the compressor on, your expansion valve may be malfunctioning.
    What is the pressure with the system off?
     
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  9. about20ninj45

    about20ninj45 Full Access Member

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    Good. Now tell me how often txv's malfunction lol
     
  10. OneofFew

    OneofFew Full Access Member

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    Not often... Need more info.
     

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