A/C compressor

1994 GMC SONOMA
175,000 MILES • 2.2L • 4 CYL • 2WD • MANUAL
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CRAIG HARTMAN SR.
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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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Jul 21, 2017 at 10:01 AM
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HMAC300
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See picture, single arrow is low side or suction and double arrow is high side or discharge.
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Jul 21, 2017 at 12:17 PM
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CRAIG HARTMAN SR.
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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
Jul 21, 2017 at 12:33 PM
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CRAIG HARTMAN SR.
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Here is another picture. Thank you
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Jul 21, 2017 at 12:52 PM
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STRAILER
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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
Jul 21, 2017 at 2:39 PM