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Q: Air conditioner only works for a few minutes, then stops blowing cold air. on 2005 Chrysler Sebring

A couple months back I had a leaking head gasket. It was replaced, then it blew out my front seal within minutes. After doing it a 2nd time, the mechanic told me I had crankwalk. They replaced 3 bearings (one being the thrust bearing), machined the crank, and replaced the seals. Car isn't leaking anymore and sounds normal.

Now my problem is with the A/C. The mechanic told me he had to evacuate the R134a and disconnect some A/C lines when he did the crank work. Since he doesn't have the necessary tools to deal with air conditioners, I had to take my car to another mechanic who checked for leaks, replaced two O-rings and both fittings on the lines. He recharged the system and gave me back the car. When he did, he told me the A/C compressor was failing. He said the compressor kept turning on & off so I should have it replaced.

I saw the clutch engage, then disengage several times before it would stop all together. I bought a used A/C compressor pulled from a 05 sebring with 47,000 miles. He installed it & gave me the car back.

I'm still experiencing the exact same problems. On a cold start, the compressor turns on and cold air starts coming out of the vents. After 2-3 minutes, the compressor turns off, then on again, off again, etc... Under the hood, I can see the clutch engage, then disengage several times before it just stops doing it's thing.

So two A/C compressors doing the exact same thing has me thinking my problem isn't with the compressor, but with something else. I checked the fan relays and they're fine.
I've already spent a buttload of money on this car and this A/C is just frustrating me now. Any ideas as to why it's not staying on?

No leaks, system is charged. Compressor works for only a few minutes on cold starts, then stops working. I've had the car for 3 years and the A/C had always worked fine. There was nothing wrong with it at all before the first mechanic disconnected some stuff to deal with the crankshaft issue.

Is there anything specific I should check? I'm hoping it's simply a bad sensor somewhere, but don't know what & where to check.
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maybe you should use mutil di@g access j2534 Diagnosis of cooling electronic.
Thanks for the quick reply.
To be perfectly honest, I'm tired of this car. It has been nothing but problems since I bought it three years ago. My driver's window doesn't work when it's cold in the mornings (or night), my check engine light was causing problems for a long time and it took 3 different mechanics to finally diagnose & repair it. Funny thing is I asked them to specifically check my idle air control sensor and they confirmed it was the culprit. If I hadn't mentioned it, they probably would have reset the CEL and given it back to me saying they found nothing wrong with it.

The whole crankwalk problem had my car in the shop 6 straight weeks where they replaced gaskets, bearings, seals, and other stuff. This is when my AC stopped working right. Now after a replacement AC compressor, new o-rings, new fittings, and recharge of the system I'm still having issues. I took it back to the mechanic who did all the AC work and he said he was "stumped." I asked him to look into the ambient temperature sensor and expansion valve. He called me about 20 minutes ago and said replacing the expansion valve seems to have worked. It no longer stops blowing cold air (but the compressor still keeps cycling every 10 seconds or so).

I don't know whether a compressor cycling every 10 seconds is normal operation, but I might as well waive the white flag and buy a NEW car. Another used car is not worth buying :(

That's what I get for buying a used car I suppose.
I have a 2001 Chrysler Concorde. I initially had similar issues to what you describe with the AC until it eventually stopped all together. Replaced some leaky parts then eventually the compressor, which then tanked my alternator over $1200 on a car that barely is worth that. Then the AC and heat stopped working the entire fan everything would go out...I believe it is something to do with the key because wiggling it just right (sometimes takes 5-10 minutes of wiggling) will start the air again, this is sometimes accompanied by turn signals not working, windows not working, and airbag light coming on, but sometimes its just the AC.
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