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Another AC Probelm - VX II

Discussion in 'VT - VX Holden Commodore (1997 - 2002)' started by jughead1, Feb 23, 2015.

  1. jughead1

    jughead1 New Member

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    Late last year we had the engine mounts changed on our VX Series II Wagon. After the repair, the AC would not cool.
    The fan blows OK, and changing the vents (floor to face to demist) works OK.

    I spoke to the mechanic who did the mounts, and he suggested checking the plugs as he claims that nothing he did should have caused the AC to stop working.

    I have checked the connector to the compressor, and changed the relay in the fuse panel in the engine bay. The system appears to be gassed (hi power hiss when I release the valve in the pipes).

    When the AC button is pressed, the pipe from the compressor to the radiator is hot. But the air coming out of the vents is not cold.

    Any ideas?

    Cheers,

    JG
     
  2. mpower

    mpower Well-Known Member

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    can you hear the compressor kicking in at least?
     
  3. B-Man

    B-Man Member

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    does the center of the aircon fan spin when engaged (turned on)?

    is the pipe from the condenser to the firewall cold up near the firewall/ low pressure switch?

    do your thermo fan run when the a/c is turned on?

    is this a v6 or v8?
     
  4. Nut Kracker

    Nut Kracker Donating Member

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    Could be......
    Refrigerant overcharge.
    Condenser fan not operating (driver's side low speed radiator fan).
    Condenser fins clogged with debris.
    Fan belt slippage.
    Radiator overheating.
     
  5. st3r3otyp3

    st3r3otyp3 Donating Member

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    could be low on gas but just enough to kick the compressor over but not enough to cool, you may have a very slow leak.
     
  6. jughead1

    jughead1 New Member

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    Hi Guys,

    I checked and the compressor does cut in when switched on and the pipe to the radiator gets hot.

    I will check the other things this afternoon.

    The system is definitely not over gassed as we have not had it re-gassed in the 6 years we have owned the car.
    The system stopped suddenly, after the engine mounts were changed. Initially I thought that in moving the compressor out of the way to change the mounts, the mechanics had inadvertently nudged it and broken a seal or ruptured a line. But after 6 months since the mounts were changed, there still appears to be gas in the system.

    Would the condensor fans or fins affect the system right from cold? The system does not cool at all now.


    Cheers,

    JG
     
  7. Nut Kracker

    Nut Kracker Donating Member

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    Yes it can.
    The condenser needs a constant airflow over it, to ensure proper cooling is achieved.
    Blocked fins on the condenser or the fan not working properly, will reduce the efficiency of the system.
     
  8. VR38

    VR38 Well-Known Member

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    Take it to a shop and have it serviced.
    Sounds like a VERY strange coincidence that it stopped working after the mechanic played with he compressor.
     
  9. jughead1

    jughead1 New Member

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    Yes, strange coincidence.

    However, shop = money, and that we don't have spare at the moment (which is why I have waited so long since the mounts were changed).

    Will keep looking for the fault. Unfortunately it was raining too hard yesterday to check anything.
     
  10. Nut Kracker

    Nut Kracker Donating Member

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    How long after the repair, did you notice it not working?
     
  11. jughead1

    jughead1 New Member

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    Hi all,

    I noticed the AC not working a few days after the mounts were changed. But at the time I was broke, so could not do anything about it.

    I have checked the fans are both working, and the radiator is not clogged with anything. Also, the radiator is not getting hotter than normal.

    The pipe to the radiator is hot, but the pipe to the firewall is not very cold.


    Any more suggestions?
     
  12. iChris

    iChris New Member

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    I would be taking a look under the car, on the underside of the compressor to see if it's been leaking any dye or oil. Sometimes there can be still enough gas not to trip the pressure switch and for it to not cool properly.
     
  13. MrVZ

    MrVZ New Member

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    if i remember correct, the pipe that runs from the receiver drier up front to the tx valve which i think is mounted on the firewall ( it is on my vz so im just assuming here ) is a high pressure line so it should be warm ( this is a small line ) the bigger line that will be around it is the low pressure side that should be cool to touch ( this is if i remember proper )

    The whole not cooling thing could be a stuck tx valve which wont let the gas flow through it like it should which would stop the cooling or maybe the evaporator is busted to, sorry if i aint much help, havent done much A/C work
     

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