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Air conditioner blowing hot air

Tiny
FORGIVENMH41
  • MEMBER
  • 2002 GMC ENVOY
  • 218,000 MILES
Okay, on my wife's vehicle listed above the water pump went out so I changed that and the thermostat. Then the radiator had a crack I noticed so I went back and replaced that. Then when I started it up the A/C was blowing real cold air for about 2 minutes then started blowing hot air, but before all the work it was cold. What would cause this?
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Tuesday, June 9th, 2020 AT 12:41 AM

1 Reply

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

You may have a leak in the system and the freon leaked out.

https://www.2carpros.com/articles/air-conditioner-leak-detection

Does the compressor engage when you turn it on?

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

Do you have a set of gauges that will tell the high and low side pressures?

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

Roy
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Tuesday, June 9th, 2020 AT 2:30 AM

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