MY AC some time cold and some time hot

Asked by May 28, 2017 at 06:22 PM about the 2011 GMC Sierra 1500 SLE

Question type: Maintenance & Repair

Hi i have sierra 2011 1500 my ac some time its very cold and some time its
hot and i can feel the compressor clicking on and off , i brought the car to the
shop ,we have checked fr ion gas  pressure  compressor clutch ok really
replaced no help pls help

2 Answers

855

Expansion valve may be having issues. Also if there is an inline filter it may be partially clogged.

possabally a restriction,,, your pressures should be in 70 to 80 degree weather,, 35 to 40 on low side and 175 to 190 on high side with ac running,, if low side is less then 35 and high side is 175 to over 200,, you have a restriction

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