A/C pressurized and clutch running, but air is not cold

Tiny
CONVERT99
  • MEMBER
  • 1999 CHEVROLET EXPRESS
  • V8
  • AUTOMATIC
  • 150,000 MILES
We just bought the vehicle listed above and the A/C is only slightly cooler than max heat. Compressor clutch is running and system is holding pressure so assuming no leaks. I have recharged multiple times in the last 4 days with no success. Fans are blowing air so assuming no blocks. Any ideas?
Wednesday, August 25th, 2021 AT 8:21 PM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
I think we need to start with what the pressures are because if you charged it that many times, the pressure could be too high at this point.

However, if the compressor is running and it has never blown cold then the compressor may be failed.

The pressures is really the only way we are going to know what is happening.

Here are a couple guides that will help with this:

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

Basically we need to know what the high and low side pressure is with the system turned off. Then what they are when the system is turned on and compressor is engaged.

This will tell us what the issue is or where to go next. Below is a chart of proper pressures based on outside temperatures. Also it shows what possible issues are based on pressures.

Please run through this and let us know what questions you have. Thanks
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Thursday, August 26th, 2021 AT 6:23 PM

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