My 2001 chevy Silverado 6L Dear MW: I have a 2001 Chevy Silverado A/C problem. The compressor cycles on and off very fast. It does blow cold but not long enough to cool the cab, inside temp is 120 a/c cools down to 80. System appears to be full. Can you Help?
MW: As long as you are SURE that the freon charge is correct (best way to check is to evacuate, see how much came out, and re-charge with proper amount) then 1 thing to look for is a problem with the low pressure switch. They have been known to be faulty and cause the compressor to cycle on and off. The low pressure switch screws into the accumulator, and has a 2-wire connector. The accumulator is the aluminum cylinder with 2 lines attached to it. It is near the firewall, on the pass. side. A light tap on the sensor while compressor is on, usually will turn off compressor and indicate switch needs to be replaced.