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Air conditioning after driving a while starts blowing warm air

Tiny
PENNY CARTER
  • MEMBER
  • 2004 CHEVROLET TRAILBLAZER
  • 4.2L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 184,000 MILES
Air conditioner works when I first start car and drive for quite a while and then all of a sudden it will stop. Blows really cold air when it’s working, and then starts blowing warm air after driving for a while. Not low on Freon I checked it.
Monday, September 2nd, 2019 AT 5:45 PM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

Can you give me the low and high side pressures when it blows warm? I need those readings to help determine the failure.

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

Does the water drip on the ground when it is running?

Roy
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Tuesday, September 3rd, 2019 AT 5:34 AM
Tiny
PENNY CARTER
  • MEMBER
  • 2 POSTS
I haven not checked the pressure. But yes water is dripping from underneath the car when the car and air is on.
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Tuesday, September 3rd, 2019 AT 4:39 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, you can rent a set of gauges at a parts store or buy a cheap set at Harbor Freight?

Let me know when you get the pressures.

Roy
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Wednesday, September 4th, 2019 AT 3:35 AM

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