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2001 Suburban new mag clutch worked for 1 year

rojeho on Sun June 16, 2013 4:17 PM User is offline

Year: 2001
Make: Chevrolet
Model: Suburban 1500 2WD
Engine Size: 5.3
Refrigerant Type: R134a
Country of Origin: United States

Last summer the AC started to become intermittent. I removed the shims, and then ended up replacing the magnetic clutch with a new one. As soon as I did, the system worked flawlessly and has done so until today when it kicked off while driving and hasn't restarted. Am I looking at replacing the compressor now or is there anything else that I should do first? If I do have to open up the system, is there anything unusual because of the rear AC system? Or is it just more line to evacuate and refill?

mk378 on Sun June 16, 2013 4:46 PM User is offline

How are you sure the clutch is the problem now? Check for voltage to the coil.

iceman2555 on Mon June 17, 2013 11:40 AM User is offlineView users profile

Perform a complete electrical diagnosis of the clutch system. It appears that the problem could be electrical. The clutch engagement is controlled thru the BCM/AC controller. A simple new clutch may not be the answer, nor a clutch replacement. Exchanging parts to determine the solution to a problem is not a acceptable repair procedure. The cause of the primary failure must be determined or a repeat failure will occur....'never have time to do the job right....but always got time to do it again.....!!!!
Also, it is not just 12 volts to the coil...this is a ground side switching simply having 12 volts to the coil may not be the only answer. Evaluate the system. Complete the repair.
Good luck.

The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Thomas Jefferson

mk378 on Mon June 17, 2013 7:20 PM User is offline

I should have said "voltage at the coil". If a coil has two wires going back to the electrical system, measure the voltage between them (with the engine running and the A/C turned on).

rojeho on Mon June 17, 2013 11:51 PM User is offline

You're right, I need to check the electrical first. It's just that it has been flawless since I changed the clutch, and then the same problem came back so that's where my brain went to. This is why I don't do this for a living - appreciate the help you guys provide.

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