Replacing AC Compressor Motor - 1999 Cherokee -
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Unread 09-01-2009, 06:55 PM   #1
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Replacing AC Compressor Motor - 1999 Cherokee

My AC Compressor Motor doesn't turn in my 1999 Cherokee Sport, I was wondering if there was a way that I could get it to turn, ( that'd probably be the easier solution. ) OR if there was a way to replace the unit. I've searched and some say that the freon will go every where and I'll have to recharge it and what not, but I found one post about a 98? Wrangler and some one said that it's possible to replace the unit with out releasing all the freon... On top of the unit there is a little box that all the tubes go into, and a bolt that attaches that to the unit. Maybe I can just take off the little box, take out the unit, buy a new unit, and replace the the old one, and attach that little box on to the new unit? PLEASE post ANY solutions...

Thanks in advance,


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Unread 09-01-2009, 07:21 PM   #2
AZ Jeff
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First off, the compressor will NOT turn unless the appropriate amount of refrigerant is in the AC system. That's by DESIGN, and it protects the compressor from fatal damage due to lack of refrigerant. (Refrigerant is a lubricant for your compressor.)

You can check for this condition by putting a jumper across the low pressure switch on your accumulator. If the compressor engages then, you know the issue is low refrigerant. If it does NOT, then your issue is probably either more basic electrical issues, or a defective compressor clutch.

If your issue is lack of refrigerant, I STRONGLY suggest you employ the services of a professional shop with experience in working on AC systems. This part of your XJ requires tools and equipment that most DIY guys do not have. Furthermore, doing this without those tools increases the probably of damaging other parts SUBSTANTIALLY.

Pay a pro to check your system for leaks, and if none are found, have him refill it. You WILL save money in the long run.
1992 XJ -- stock (RIP)
2000 XJ -- lots of basic mods. Sold to fellow forum member. I miss it.
2014 JK -- the project is just starting!
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Unread 09-01-2009, 09:48 PM   #3
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The refrigerent will come out when you start disconnecting the lines. Like AZ Jeff said, you should let someone with the proper tools and know how work on it. AC work can be expensive so you do not want to do any damage to the system. Try jumping the low pressure switch, it may just be low on refrigerent.
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Unread 09-02-2009, 10:02 AM   #4
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Alright, thanks guys! It seems as though regardless of the problem, I should take it to a repair show. I'll give em a call today, thanks for your help!
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