02 9100i a/c issues

Discussion in 'International Forum' started by wconner, Apr 25, 2025.

  1. wconner

    wconner Bobtail Member

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    Jun 21, 2015
    annapolis, md
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    Got an issue with the a/c. Blows cold at idle while driving after about 10 min it starts blowing warm. About 1 min after stopping at idle it gets cold again. Just about everything has been replaced. The APADS keeps showing a green light. any thoughts on this, it's driving me crazy.
     
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  3. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Sounds like it's freezing up. Likely not enough air flow across the evaporator or low freon.

    Have you pulled the seat to look at the evaporator? What are you seeing with the gauges? Have you considered getting rid of the apads?
     
    BoxCarKidd Thanks this.
  4. wconner

    wconner Bobtail Member

    19
    5
    Jun 21, 2015
    annapolis, md
    0
    The evaporator was replaced along with the apads the gauges at idle are normal. the only parts not replaced is the condenser and compressor
     
  5. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Does the clutch kick out? What are the gauges showing when it's warm? What pressure also, don't just say normal
     
  6. Heavyd

    Heavyd Road Train Member

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    Make sure you have max selected to ensure it is recycling inside air. If not it will be drawing in outside hot air all the time. Also make sure you have coolant shut off taps on the heater core lines and those taps are shut off.
     
  7. wconner

    wconner Bobtail Member

    19
    5
    Jun 21, 2015
    annapolis, md
    0
    All that has been done, the problem is, it blows cold at idle. Once you get up to speed it stops blowing cold, return to idle and gets cold again. Could adding PAG oil every time it is recharged have anything to do with it ? I thought you only put the compressor oil in the first time when replacing the compressor.
     
  8. JB7

    JB7 Heavy Load Member

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    Dec 13, 2022
    Laurel, MD
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    Re-read post #4. Need the gauge pressures when it blows both warm and cold.
    "I thought you only put the compressor oil in the first time when replacing the compressor." Compressors come with oil and there are some instructions where oil needs to be measured and some removed at replacement. Oil normally added when replacing a condensor or evaporator.
     
  9. Heavyd

    Heavyd Road Train Member

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    Ok, few things.
    1-the compressor clutch may be faulty where it will not engage when fully hot due to engine heat that is only there when moving.
    2-you are going to have to set up a test light when driving to see if the compressor is turning off due to the APADs killing power to it.
    (make sure you have power going through the freeze switch.)
    3-you need to road test with a set of gauges installed to see what the pressures are when this happens to help diagnose.

    The whole system only uses about 10 oz of oil. How much you add depends on how much leaked out and how much is still in there. The problem with that, it is impossible to know. During top ups, how much are you adding? I only add oil based on how much was recovered when I refill a system.
     
  10. BoxCarKidd

    BoxCarKidd Road Train Member

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    How do you get rid of the apads and make the system work?
     
  11. Arctic_fox

    Arctic_fox Experienced mx13 execrator

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    I have the same issue. Its the compressor. The clutch is likely shot and the whole unit needs to be replaced sadly. Had the same sequince of events but in my case my condensor had a hole through it and im pretty sure it caused the clutch on the compressor to burn up since after new condensor oil ect. It still doesnt work.
     
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