Question about 2006 Jeep Liberty

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2006 Jeep Liberty Compressor Works, Still No Cold Air

Last summer, I had the a/c compressor replaced in my 06 Liberty. It's not blowing cold again, so I took it in. The compressor & clutch are fine, so they replaced the PCM and checked the tranducer & pressure switch. All seemed good, and they're able to hot wire the compressor to get it to engage, and it blows cold. They're telling me it's electrical (something between the PCM and the compressor) and it'll cost me ANOTHER $325 to take apart my engine and just check the wiring. That doesn't even cover any further repairs, just the diagnosis. He also mentioned it may be the junction box? Any ideas or suggestions on something I can try myself before I unload a ton more money? And if it is something that I have to have repaired at the shop, what should be a reasonable cost? I live in AZ, and it's going to be hot VERY SOON. Thanks for your help!!

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  • jaimesyens May 28, 2010

    The last expert suggested I take the battery out for 5 minutes, and hook it back up. Did not work. PCM was reprogrammed when it was installed. Also checked the fuses and relays. They're fine.

  • jaimesyens Jun 02, 2010

    The wiring ended up being back behind the engine, which meant we'd also have to take the engine out. Hubby also found an oil leak in the engine casing, which is never good news. Long story short, we ended up trading it in for a new car. But thanks for all of your help! Had we not tried it, we would have never found the oil leak, and probably ended up with a MUCH bigger problem!!

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  • Master
  • 2,427 Answers

Well u can do it your self I'll walk you through it.. I tske it by pcm u mean the ecu or cars computer... Ok firstly start at the compressor.. I recommend u get a camera and take detailed shots of this cause u will need it... Remove plug from it and work your way back along the harness removing all the pieces of it until u get it out.. Now u have 2 choices.. The first is to remove the loom of the harness and replace any broken wires.. Or the second is 2 replace it.. With that done wire back up the harness as you took it out.. Now check the ac and compressor fuse and relay in the fuse box.. What they call the junction box.. If everythin is fine and it stil will not work.. Then run a positive wire from your battery to the compressor and a negative wire to the same.. Now the compressor will trip if its electronic if not forget that.. Check your dryer bottle , control unit, and the ac gas.. Can't see anything else causing this since that's the whole ac unit..

Posted on May 28, 2010

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  • Jeep Master
  • 15,478 Answers

First let me say that there is a recall on the PCM for programming and it should have been done by now. The next thing that you need to do is unhook the battery for 5 minutes and let it sit. Hook it back up and try the AC again.

Posted on May 27, 2010

  • jaimesyens May 28, 2010

    Took the battery out, let it sit for 10-15 minutes, hooked it back up. Nothing. Also checked the fuses and relays, and they're all good. Any other suggestions?



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