Do you hear the compressor kicking in ?
Either the system needs to b recharged, or there is an air leak. To see if there is a leak, check in the sight glass on the compressor to see if there is bubbles or fog in the unit. If not, then condensor or compressor could be faulty. Make sure clutch is engaging.
Does it begin to cool during the initial start up of the A/C unit?
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2004 CHEVY SILVERADO CREW CAB 2500 HD 6.0L TURN AC SYS ON MAX, AFTER A LITTLE WHILE AIR GETS HOT, I FOUND IF I SHUT THE SYS OFF AND TURN THE ENGINE OFF, AND START OVER AGAIN SYS WORKS FINE, NO CODES STORED.
2004 CHEVY SILVERADO 4X4 CREW CAB 6.0L, WITH AC SYS ON MAX, WHILE DRIVING HEAT COMES THREW VENTS, NOT WARM AIR BUT HEAT, I FIGURED OUT IF I TURN OFF AC SYS AND TURN OFF VEHICLE, THEN START ALL OVER SYS WORKS OK. NO CODES STORED IN SYS FREON OK, COMPRESSOR OK, IT'S ELECTRICAL' JUST CANT FIGURE IT OUT. PLEASE HELP.
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