2000 Silverado 4.8 AC compressor never stops - The 1947 - Present Chevrolet & GMC Truck Message Board Network

hillytim69 · 06-13-2009, 02:43 AM

This just started this spring, when driving with the ac on I will hear the compressor bleed off excessive pressure, sounds like air brakes on a semi truck. i looked under the hood and see the compressor running but never cycles. At idle it seems ok but with increased engine speed the pressure builds up until it blows off with a loud WHOOSH! The refrigerant level is fine just seems the compressor never kicks off. I wonder if this is just a switch problem or what. Anyone see this before on these trucks?

06-13-2009, 02:43 AM	#1
hillytim69 Registered User Join Date: May 2009 Location: becker, mn Posts: 74	2000 Silverado 4.8 AC compressor never stops This just started this spring, when driving with the ac on I will hear the compressor bleed off excessive pressure, sounds like air brakes on a semi truck. i looked under the hood and see the compressor running but never cycles. At idle it seems ok but with increased engine speed the pressure builds up until it blows off with a loud WHOOSH! The refrigerant level is fine just seems the compressor never kicks off. I wonder if this is just a switch problem or what. Anyone see this before on these trucks?



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