intermittent ac operation sometimes cool other times hot? on 2000 Cadillac DeVille

when working ac blows cool at best otherwise warm to hot air in all vents. checked pressure and very good no leaks, but air is never very cold when working.

by in Herrin, IL on August 26, 2013
1 answer 1 comment
ANSWER by on August 26, 2013
MUST HAVE GAUGE READING TO VERIFY PRESSURES ARE GOOD. POSS ORFICE TUBE BLOCKAGE WHICH WOULD GIVE YOU HIGH SIDE PRESSURE
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COMMENT by on August 26, 2013
I added a little refrigerant to check for blockage on low side valve. After which showed increased pressure. Sorry I didn't mention this and I appreciate your quick response. Thank you.