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A/C compressor

Tiny
CRAIG HARTMAN SR.
  • MEMBER
  • 1994 GMC SONOMA
  • 2.2L
  • 4 CYL
  • 2WD
  • MANUAL
  • 175,000 MILES
I would like to know which ports hole are the high and low side for the pressure switches? Looking from the back side of the compressor is the top one low side and the bottom one high side? Thank you, Craig
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Friday, July 21st, 2017 AT 10:01 AM

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Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
See picture, single arrow is low side or suction and double arrow is high side or discharge.
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Friday, July 21st, 2017 AT 12:17 PM
Tiny
CRAIG HARTMAN SR.
  • MEMBER
  • 3 POSTS
Do you see were my fingers are? Thought plugs come out to install the pressure switch's cut on and cut out. Need to know which. I think the one on top is low and the bottom one is the high side. Thank you, Craig
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Friday, July 21st, 2017 AT 12:33 PM
Tiny
CRAIG HARTMAN SR.
  • MEMBER
  • 3 POSTS
Here is another picture. Thank you
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Friday, July 21st, 2017 AT 12:52 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
Hello,

The port closest to the suction port is the low side port.

Here is a guide to help you with the job:

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

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken
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Friday, July 21st, 2017 AT 2:39 PM

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