Engine Size: 5.3 lite
Refrigerant Type: 134
Ambient Temp: 90
Country of Origin: United States
I have a 2000 Z-71 Chevy truck and the A/C cycles off and on. Sometimes it will run for days without quitting and some days it cycles on and off. It blows really cold air when it is working. It seems to me when it quits if you turn it off for a few minutes it will start working again. Sometimes it will stay working but yesterday it did it constantly. It also seems to me the warmer it gets outside the more it does it. Can any one help me?
Steven A Cirtaus
Sounds like evaporator freeze up- next time it quits- see if compressor is running and/or suction pipe is frosty white- if frosty- then freeze-up- you can't blow air through ice! So if frosty- the fix is a new cycling switch- because that is what controls evap from freezing.
The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......
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