A/C blowing hot air

1996 CHEVROLET SILVERADO
245,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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ETHANLJONES
  • MEMBER
  • 1 POST
I just replaced my compressor and all the lines and condenser. Then my compressor clutch wouldn’t kick in, so I went to the fuse box and jumped the relay. It then turned the clutch on, and the truck was blowing ice cold air!!! So, I found out the reason the clutch wouldn’t kick on was because the clutch cycling switch on the accumulator was bad, so I replaced it. Now everything under the hood is working properly and it’s holding refrigerant but blowing hot air. Doesn’t make sense to me any advice would be greatly appreciated.
May 26, 2022 at 1:22 PM
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STRAILER
  • ✓Experienced Mechanic
  • 55,273 POSTS
It sounds like the temperature blend door actuator is not working, to confirm, let's test the system to make sure it is getting cold, with the engine running and the A/C system on grasp the low sideline coming from the firewall to see if it is cold. If so, then the temperature blend door actuator is bad, here is a guide to help you change it out.

https://www.2carpros.com/articles/replace-blend-door-motor

Also, this guide can help as well:

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

Please run down these guides and report back.



May 27, 2022 at 9:51 AM
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