help with my a/c! on 2001 Pontiac Grand Prix

2001 pontiac grand prix 3.8 w/170k miles...turn the a/c on and the car clicks (sounds like something is clicking on an off repeatedly) while clicking my rpms start jumping up and down from 300 to 1500 and the a/c stops blowing cold and blows out fire hot air instead of cold

by in San Diego, CA on May 02, 2013
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1 answer
ANSWER by , May 02, 2013
Several things can cause this, low refrigerant (freon) charge, cooling system or fans not working properly ac compressor malfunction ect. Need to see it to fix it!