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A/C not blowing cold enough air?

Tiny
HUEVO
  • MEMBER
  • 1999 CHEVROLET TAHOE
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 97,000 MILES
So, I changed out high side pressure sensor. Recharged the system to spec. The compressor doesn’t shut off or takes a while to cycle. Inside the blowing temperature is 51 - 72F. When it gets to 51, I’ve been driving for about 30 minutes. I’ve driven my brothers truck his output is 41F at the vent. So, what I’m I missing? All actuators are working. Or the fresh air is still open. Where is the recirculation door? Maybe that is still open?
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Monday, October 10th, 2022 AT 9:00 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,895 POSTS
Sure, can I ask what the pressures are for the high and low side? Also, did you add oil when you did the repair? Please let me know, in the meantime here are two guides that can help:

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

and

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

Please go over these guides and report back.

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Tuesday, October 11th, 2022 AT 10:02 AM

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