why does my air cond. stays on with everything turned off.

2006 FORD F-150
45,500 MILES
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BLUE GMC
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we have tried everything we know. the only way we can turn the compressor off is unplug the wire from the cluch on the compressor. something is keepin the the cluch ingaged. its not the low or high pressure switch.we need help.
Oct 28, 2011 at 10:16 PM
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RASMATAZ
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Could be the AC relay sticking
Oct 31, 2011 at 11:32 AM