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  1. 08-19-2008, 10:00 PM #1
    tech88
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    Question A/c question

    I have a 1990 silverado that needs a pressure cycling switch. Do i have to de pressurize the system before i remove it
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  2. 08-20-2008, 04:18 AM #2
    zippy
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    Hello, tech88, and welcome aboard,

    Work on the pressure side of R-12 and R-134a is best done by an EPA certified A/C tech. Remember, it's a federal crime to vent refrigerant into the atmosphere.
    Are we having fun, yet?
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