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A/C not blowing cold air

Tiny
CPERRY54
  • MEMBER
  • 2003 CHEVROLET SUBURBAN
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 220,000 MILES
My A/C clutch comes on and goes off, air is not cool. It took about 1/2 can of Freon, wouldn’t take anymore. Changed the pressure switch and still will not blow cold.
Saturday, July 18th, 2020 AT 6:33 AM

1 Reply

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

It sounds like you are low in Freon. If the compressor cycles, the low pressure may be dropping to 20 or below which will turn off the compressor until the pressure comes back.

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

Do you have a set of gauges to give me the high and low side readings? You can rent a set at a parts store. I need to see those reading with the A/C system turned on.

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

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

It sounds like you have a leak in the system. I also attached a wiring diagram for you to view as well.

https://www.2carpros.com/articles/how-to-check-wiring

Roy

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Saturday, July 18th, 2020 AT 6:45 AM

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