A/C compressor not working

Tiny
RONALD KIDWELL
  • MEMBER
  • 2007 JEEP LIBERTY
  • 3.7L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 130,000 MILES
A/C compressor clutch doesn't even attempt to engage. I have checked both fuses one for compressor and one for clutch.
Sunday, May 12th, 2019 AT 12:43 PM

3 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Hi Ronald,

Here is the test for the AC clutch. However, have you check the Freon level? If the level is low then the PCM will prevent the clutch from coming on.

Here is a guide that will help walk you through the basics as well:

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

Let me know what happens with these and we can go from there. Thanks
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Sunday, May 12th, 2019 AT 5:19 PM
Tiny
RONALD KIDWELL
  • MEMBER
  • 2 POSTS
I tested with engine off pressure is 145.
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Sunday, May 12th, 2019 AT 5:37 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
That is pretty high for a system that is off. Normally it is around 70 PSI.

This is an electromagnetic clutch so as long as you have power at the compressor for the clutch, it seems that the clutch as failed.

Below is the procedure to replace the clutch depending on which one you have. However, I would run through the AC clutch test that I provide previously before you just replace it.
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Sunday, May 12th, 2019 AT 6:03 PM

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