A/C not blowing cold air

2003 CHEVROLET SUBURBAN
220,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC
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CPERRY54
  • MEMBER
  • 35 POSTS
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.
Jul 17, 2020 at 11:33 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 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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Jul 17, 2020 at 11:45 PM
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