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aircon

Discussion in 'VCDS (formerly VAG-COM) forum' started by markie A3, Apr 5, 2011.

  1. markie A3
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    markie A3 Member

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    I know theres a specific air con section, but ive asked this question already..

    Will Vcds detect if the compressor isnt running, my aircon isnt blowing cool/cold air at all. I'm not really sure what kind of noise the compressor makes so a noise test isnt much help. AOnce again sorry to ask in the vcds section

    Thanks Mark
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  2. a8 tech back
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    a8 tech back Member

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    yes look in address 08 open label file look at compressor draw amperage for operation
    a/c gauges are better for diagnosis but mvb will show you whats going on and the system pressure as well from the readings at the pressure switch
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  3. markie A3
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    markie A3 Member

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    Thanks a8 tech......
    If its not running/faulting, will it show as a fault when the car is scanned?
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  4. a8 tech back
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    a8 tech back Member

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    unlikely unless you have low pressure because the comp is duty cycled so the signal will still go as the a/c pulley anti seize pulley breaks away if the pump is foobar.
    Check the line pressure in the mvb, even with the a/c off then there should be some pressure

    If you have sufficient pressure but the a/c will not start up without a fault code and the amperage stays constant then it normally indicates the pump but at this stage if pressure is present I would connect the a/c gauges to see a more in depth status
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  5. markie A3
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    markie A3 Member

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    Thanks for you help fella
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  6. a8 tech back
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    a8 tech back Member

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    no worries hope it makes sense
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