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C5 A/C System

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Old Sep 9, 2024 | 08:30 PM
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Default C5 A/C System

I was just wondering if it is normal for A/C cold air coming out the vents to be six or seven degrees colder out of the passenger side vents than the air coming out of the dash center vent and the driver side vent? Also, is there a common place that freon leaks from the A/C system in the C5 model?
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Old Sep 9, 2024 | 09:39 PM
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Colder passenger compared to driver side is an indication of possible low r134a charge. There are many possible leak locations. One of the more common based on the number of Forum member postings I see seems to be the compressor. It has multiple o-ring joints, a couple of seal washers, and a shaft seal.
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Old Sep 9, 2024 | 10:10 PM
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Moved to C5 Tech.
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Old Sep 10, 2024 | 08:42 AM
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Originally Posted by tdoriausername
I was just wondering if it is normal for A/C cold air coming out the vents to be six or seven degrees colder out of the passenger side vents than the air coming out of the dash center vent and the driver side vent? Also, is there a common place that freon leaks from the A/C system in the C5 model?
More detail needed:

1)How long have you had the car?
2) Is this manual control or auto (blue digital display) ?
3) What is the temperature coming out of the center duct (above radio)?
4) Is this a new concern?
5) Have you checked the high/low side pressures with gauges?
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Old Sep 10, 2024 | 06:19 PM
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I'm guessing it's the climate controlled unit. As posted above, it usually (but not always) means there is a slightly low 134a charge......
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Old Sep 10, 2024 | 09:53 PM
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Two somewhat common leak points: Schrader valves and, unfortunately, compressor case seal.
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