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Why does my A/C compressor make a clicling sound when the A/C is on?

Tiny
WILL-E-G
  • MEMBER
  • 1995 CADILLAC DEVILLE
  • 119,000 MILES
The air is cool but not so much
Saturday, June 23rd, 2012 AT 2:56 PM

11 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Have the system checked for leeks as the refregrant level may be low.
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Saturday, June 23rd, 2012 AT 3:11 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
If the compressor is cycling, it could be a failing clutch, excessive pressure in system or a bad pressure switch.

Was anything done prior to this occurring?
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Saturday, June 23rd, 2012 AT 3:25 PM
Tiny
WILL-E-G
  • MEMBER
  • 4 POSTS
I replaced the compressor with a new one about a year ago, last year it worked fine, I have recharged it and it blows out semi-cool air now.I have checked the pressure and its at the normal level.
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Sunday, June 24th, 2012 AT 12:43 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
What is the normal level? Freon level cannot be determined by pressures.

Roy
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Sunday, June 24th, 2012 AT 3:38 AM
Tiny
WILL-E-G
  • MEMBER
  • 4 POSTS
The freon pressure is within the 25psi to 40psi level. With the a/c on at its highest level.
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Sunday, June 24th, 2012 AT 2:10 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
What is the high side pressure?
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Sunday, June 24th, 2012 AT 2:42 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
We need more exact info if you want us to help you.

Roy
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Sunday, June 24th, 2012 AT 2:44 PM
Tiny
WILL-E-G
  • MEMBER
  • 4 POSTS
KHLow2008 not sure I dont have a fitting for that side, Roy basically I heard if my compressor is clicking it might be low on freon or the compressor clutch is bad. But I guess I will take it in for a check, maybe there's more to this. Thank you gentlemen for the advise and help.
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Sunday, June 24th, 2012 AT 3:41 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
The low side fitting is back by the firwall and the high side is closer to the compressor.

Roy
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Sunday, June 24th, 2012 AT 3:45 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
If the ompressor is cycling, it can be too high or low pressure or a failing clutch. It can also be due to electrical faults so a proper diagnosis is required.

The low and high pressure would be able to tell us something but if only one, then it does not help. A shop should be able to help you on this.
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Sunday, June 24th, 2012 AT 6:24 PM
Tiny
WILL-E-G
  • MEMBER
  • 4 POSTS
Sounds good I will have it checked. Thanks again.
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Sunday, June 24th, 2012 AT 7:54 PM

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