A/C Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

75sierraclassic · 06-14-2007, 02:28 PM

Hey guys, my truck has a slow leak and about every summer I put a new can of freon in it. When I filled it this summer I ended up putting 2.5 cans in. I don't have any guauges so I'm not sure if its overfilled. The problem is when the compressor is running it blows really cold air, but that is for only 20-30 seconds. Then it cycles for another 20 seconds and it blows much warmer air. Is this a sign that it is overfilled or underfilled? What should the low side pressure be witht he compressor on if I get a set of gauges?

06-14-2007, 02:28 PM	#1
75sierraclassic Registered User Join Date: Jun 2002 Location: Kansas City, MO Posts: 186	A/C Question Hey guys, my truck has a slow leak and about every summer I put a new can of freon in it. When I filled it this summer I ended up putting 2.5 cans in. I don't have any guauges so I'm not sure if its overfilled. The problem is when the compressor is running it blows really cold air, but that is for only 20-30 seconds. Then it cycles for another 20 seconds and it blows much warmer air. Is this a sign that it is overfilled or underfilled? What should the low side pressure be witht he compressor on if I get a set of gauges?



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