ac not working on 2002 GMC Safari

ac does not turn on all the time. if i leave the control on sometimes it comes on and sometimes it does not.

by in Tustin, CA on June 20, 2011
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1 answer
ANSWER by , June 20, 2011
There is a low pressure switch at the drier that is notorious for intermittent probs. If the system is fully charged then I would start there if when it does work it feels nice and cool.