2002 volvo vnl64t a/c problem on then off

Discussion in 'Volvo Forum' started by sullens, Feb 27, 2014.

  1. Feb 27, 2014 #1
    sullens

    sullens Bobtail Member

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    Oct 22, 2013
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    HELP, i HAVE VOLVO WHEN U TURN THE IGNITION SWITCH ON THE A/C COMPRESSOR CLUTCH COMES ON AFTER ABOUT 10 SEC. THEN SHUTS OFF AFTER 10 OR 15 SECS AND WILL NOT COME BACK ON UNLESSU CYCLE THE KEY. I PUT 12 V TO THE GREEN WIRE ON THE A/C BOX ON FIRE WALL AND IT RUNS FINE. SOMEONE SAID IT COULD BE DIODE BEHIND THE HEATER CONTROL?? OR THE COLD SWITCH? I REPLACED THE FREEZE SWITCH IN EVAP. BUT DONT KNOW ABOUT A DIODE?? HELP PLEASE
     
    sullens, Feb 27, 2014
    sullens, Feb 27, 2014
    #1
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  3. Feb 27, 2014 #2
    Hardlyevr

    Hardlyevr Road Train Member

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    Is there freon in the system? If it is low, the compressor will behave this way.
     
    Hardlyevr, Feb 27, 2014
    Hardlyevr, Feb 27, 2014
    #2
  4. Feb 27, 2014 #3
    sullens

    sullens Bobtail Member

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    Oct 22, 2013
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    Yes there is freon. The compressor will come on when switch is turned on and them kicks out even with engine off.
     
    sullens, Feb 27, 2014
    sullens, Feb 27, 2014
    #3
  5. Feb 28, 2014 #4
    dustinbrock

    dustinbrock Road Train Member

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    That doesn't mean there is freon. There is a low pressure switch, a high pressure switch, a freeze switch. Have you checked the actual pressure in the system? If it is out a couple lbs it could stop it from working.
     
    dustinbrock, Feb 28, 2014
    dustinbrock, Feb 28, 2014
    #4
  7. Feb 28, 2014 #5
    dustinbrock

    dustinbrock Road Train Member

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    Apr 19, 2012
    North Battleford, SK
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    Bypassing the hi lo switches is essentially what you are doing so of course it will work when you bypass all safety mechanisms
     
    dustinbrock, Feb 28, 2014
    dustinbrock, Feb 28, 2014
    #5
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