2000 silverado need a/c help

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Jul 23, 2022 | 2:41 PM

kna4977

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2000 silverado need a/c help

A/C has been fine until a couple of days ago. I was driving home and it got warm. I turned it off for a bit then back on and it worked. Since then it’s been intermittently doing the same thing. I checked the charge and the pressures are in range. I tried a new cycle switch the one on the drier and same behavior. It will come on once and drop pressure down to around 38 at idle on low side and around 220 on high side. If I rev it higher the low side drops down to 1.8 kg/cm where it cuts off. This is also about 27 psi. Then pressures go back up. It’s supposed to cut on again at 2.8 kg/cm or around 42 psi but when it reaches that I can hear the cooling fan spin faster like it thinks the a/c is back on but the compressor never kicks back on unless you give it a break and start all over. Any ideas? It’s around 110 outside temp.