[pprince72]

. .....I have a 1998 K1500 and 244,000 miles on the whole A/C system and only had freon added by the dealer about 10 years ago. The problem is the A/C works good up the upper 80's but when the temps get into the 90's and humid the compressor quits working (when I need it most) after 15+ minutes then I turn it back on maybe 15 minutes and up to 30 minutes it works good again then off and so on. The only thing I can think of is a faulty high pressure sensor?
....... My next question if I replace the high pressure switch should I replace the Receiver Dryer or just Evacuate & Recharge the system? I appreciate any thoughts its going to be in the upper 90's for the next week + and thats in Minnesota. Thinking of snow