AC issue after replacing compressor

Tiny
SERIOBASEL
  • MEMBER
  • 2009 CHEVROLET AVEO
  • 1.6L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 124,000 MILES
Hi. The auto store said I needed to replace the compressor because it was noisy, AC still worked that time.
After I replaced the compressor I am having problems charging the system with Freon. The system will only take a small amount of Freon, the compressor kicks in but there is no sign of cold air.
I vacuumed the system and it seems to hold pressure.
Also, I noticed the fan does not run when I am trying to add Freon.
Please help.
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Wednesday, June 13th, 2018 AT 1:20 AM

7 Replies

Tiny
ASEMASTER6371
  • EXPERT
Good morning.

How long did you evacuate the system?

Did you replace the receiver/dryer? That must be done.

How much did you install? Can you tell me the pressure you have on the high and low side?

Roy

https://www.2carpros.com/articles/air-conditioner-how-to-add-freon
https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak
https://www.2carpros.com/articles/re-charge-an-air-conditioner-system
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Wednesday, June 13th, 2018 AT 4:08 AM
Tiny
SERIOBASEL
  • MEMBER
I did not change anything but the compressor. I vacuumed the system for at least thirty minutes. Also, I noticed when I charged the system the hot side reading is within range, but the cold side reading is very high.
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Wednesday, June 13th, 2018 AT 3:11 PM
Tiny
ASEMASTER6371
  • EXPERT
Okay.

What are the exact pressures?

Roy
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Wednesday, June 13th, 2018 AT 3:12 PM
Tiny
SERIOBASEL
  • MEMBER
The hot line was around 150, the cold side seemed very high 140 or so.
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Wednesday, June 13th, 2018 AT 3:17 PM
Tiny
ASEMASTER6371
  • EXPERT
Okay, is the compressor engaged? The pressures are the same.

If the compressor is engaged, the compressor is no good.

If the compressor is not engaged. Then you have an electrical issue to the compressor clutch.

Roy
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Wednesday, June 13th, 2018 AT 3:29 PM
Tiny
SERIOBASEL
  • MEMBER
The compressor does engage. Fan does not. Thank you.
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Wednesday, June 13th, 2018 AT 3:39 PM
Tiny
ASEMASTER6371
  • EXPERT
Okay. If the compressor clutch is engaged then you have a bad compressor. The pressures being equal is the key to the diagnostic.

Roy
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Wednesday, June 13th, 2018 AT 4:01 PM

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