Question about 1993 Jeep Grand Cherokee

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Hello. I have a 1993 Jeep Grand Cherokee with 176,000 miles. 4.0 liter engine. The air conditioner has not been as cool as it should so i added a can of 134a freon which made it cooler but not as cool as it should. I bought another can of freon a couple of days later and when i started to put it in i noticed that the air conditoner was just blowing warm air and the A/C compressor was just cutting on and off continually. Apparently the freon is leaking out fast. i have also heard a sqeaking type of sound coming from what i think is the A/C compressor when i first crank it for the last 3 months. I think the compressor needs to be replaced but are their any other A/C parts that would need to be replaced at the same time? This is my work vehicle and has a good engine so i plan to keep it for a while. I would welcome any information on this problem. Thanks, Dave.

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You need the proper gauges to do any diagnostics on an a/c system...to do any work on them, you also need an evacuation pump as well as experience. That's the facts!!! I believe that 93 was the cut-off year for r12...mine has r12 in it. Unless yours was made for 134, or was properly converted I wonder how you managed to put 134 in there? If converted, it works but never as well as the r12 did...later systems got a bit better though. If the unit is cycling frequently it could be from a leak. You will need dye and an evac pump to determine if and where, as well as gauges to tell you if there are any obstructions in the system. In your case, guessing can get more expensive than just having a good shop look at it. I know that's not what you wanted to hear but it's true.

Posted on Jul 14, 2009

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A/C leaks are sometimes hard to find. I have a 93 Grand Cherokee as well and mine also has R134-A. I recently had to replace a leaky line on my A/C system. Fact is, they are getting a little older and things like seals and rubber lines are going to fail from time to time. If you replace the compressor it is also a good idea to replace the accumulator (or dryer). On the 93 Grand Cherokee, replacing the dryer also replaces two of the rubber lines as they are part of the dryer assembly. You should have a good shop troubleshoot it for you if your not familiar with A/C systems, their components and how they work.

Posted on Jul 15, 2009

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Yes..
When doing the compressor - the dryer needs to be replaced too..

Hope this helps !I
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Posted on Jul 14, 2009

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