1995 Ford Mustang A/C Clutch Not Engaging

1995 FORD MUSTANG
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CHARLES27
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  • 3 POSTS
Ive been driving my car in this California heat and using the A/C pretty regularly. Yesterday I used the A/C and it worked fine when I left my car for about an hour and came back I turned the A/C on and nothing but hot air blew out. Ive noticed that I dont get the normal strain on the engine when I activate my A/C. Does this automatically mean my compressor clutch is bad? Or could I have lost my refrigerant to a leak somewhere in the system?
Aug 1, 2006 at 7:48 AM
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TAURUSWHEEL
  • ✓Experienced Mechanic
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I would pull the elctrical connector off of the pressure switch, located on the low pressure side, usually on the receiver dryer unit, and jump the terminals on the plug and watch the a\c compressor clutch to see if it locks up, if yes at least you know that works, second may be to get the system pressure tested, run the jumper only long enough to see if the clutch locks up
Aug 1, 2006 at 12:27 PM
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CHARLES27
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[quote:99a5f2d70d="TaurusWheel"]I would pull the elctrical connector off of the pressure switch, located on the low pressure side, usually on the receiver dryer unit, and jump the terminals on the plug and watch the a\c compressor clutch to see if it locks up, if yes at least you know that works, second may be to get the system pressure tested, run the jumper only long enough to see if the clutch locks up[/quote:99a5f2d70d]

[b:99a5f2d70d]Thanks for the advice. I went out and statred the car turned the A/C on and notcied my clutch was not engaging. I jumpered the pressure switch which was on the receiver unit and still the clutch didnt engage so my clutch assembly must be bad. [/b:99a5f2d70d]
Aug 3, 2006 at 8:51 AM
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TAURUSWHEEL
  • ✓Experienced Mechanic
  • 718 POSTS
Check all electrical connections to make sure they're still hooked up, could be a relay possibly... might pay to have it looked at by qualified repair shop before dumping money if you're not 100%..
Aug 3, 2006 at 3:04 PM

Suggested Repair

Do not replace the compressor clutch yet. Check the A/C electrical connections and relay, then have a qualified shop diagnose the system before buying parts.

Conversation Summary

The owner of a 1995 Ford Mustang said the A/C suddenly blew only hot air and no longer loaded the engine, raising concern about the compressor clutch or a refrigerant leak. An expert suggested briefly jumping the low-side pressure switch to test clutch engagement, followed by a system pressure test. After the clutch still failed to engage, the expert advised checking connections and a possible relay and having a shop inspect it before replacing parts.

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