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post #1 of 4 (permalink) Old 08-26-2009, 09:01 PM Thread Starter
 
Join Date: Aug 2009
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A/C Compressor is pooched

About 4 years ago we noticed that regardless of wheter or not the function selector was on either A/C or MAX A/C, the compressor would kick in whenever the temperature control was turned below half way, in other words, if it was turned down, anywhere in the blue zone, the A/C compressor clutch engaged and the compressor started spinning. I thought nothing of it but since, the compressor has seized. I pulled the two prong multi plug off the side of the compressor to allow it to free wheel and that's the way it has been ever since but I don't want to leave it that way since first, there is now no A/C, and secondly, it has done something with the idle. The idle will hang up at 2,000 revs now when pushing in the clutch for stopping and also, if you now turn the selector switch to ANYTHING apart from the off or central position, the idle jumps up another bunch of revs above the 2,000 and stays there.

I don't want to simply replace the compressor without finding out what the problem is and I asssume it's a common problem as a cursory glance at 3 litre Fords at the wreckers shows that many of them have had the A/C compressors yanked.

Next, as a 1995 Ranger, if I simply replace the compressor, of course losing all the refrigerant in the process; will it be compatible with todays refrigerants?

Thanks very much for any help.
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post #2 of 4 (permalink) Old 08-26-2009, 09:57 PM
 
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Location: Brantford, ON
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The odds are pretty good that if you've lost the compressor there was a reason for it; most likely loss of refrigerant. Changing out the compressor will probably only cause you to burn out another compressor unless you investigate the root of the failure first.
A reputable shop will put the system under a pressure test for leaks - legally they can't apply refrigerant to a system unless it is known to be leak free.
Given the age of the truck, you are most likely looking at a conversion to "modern" refrigerant as you mentioned; to the best of my knowledge the only drawback to this is decreased efficiency (ie. less heat transfer)
After having several expensive A/C repairs on my '97, I would suggest you learn to live without the A/C. At that age, any component could be a weak link in the system.
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post #3 of 4 (permalink) Old 08-26-2009, 11:18 PM Thread Starter
 
Join Date: Aug 2009
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Still,,,,,

Thanks for the response. As you may see, the reason for the failure is that the compressor was running continuously as a result of a system glitch. I need to iron that out first and it wasn't a coolant leak as the AC worked fine. I would like to sort out why it would run continuously despite being turned off before I replace the compressor.
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post #4 of 4 (permalink) Old 08-28-2009, 12:18 PM
 
Join Date: May 2009
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Quote:
Originally Posted by What Now? View Post
Thanks for the response. As you may see, the reason for the failure is that the compressor was running continuously as a result of a system glitch. I need to iron that out first and it wasn't a coolant leak as the AC worked fine. I would like to sort out why it would run continuously despite being turned off before I replace the compressor.
Interesting enough, my 09's AC also comes on on the "dash vent / lower" setting if you know what I mean.
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