If its the tx valve or evaporator, it is in the dash and needs to come out. I had the works done, txvalve, evaporator unit, condenser and compressor replaced under warranty many years back under warranty, on troubleshooting a resonating sound.
Quite heartbreating seeing the dash out.
Dealer did say it was at least $2.5k job.
If you are paying for it, get a second quote elsewhere.
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2012 Jeep Grand Cherokee Limited 3.6L v6, Mineral Grey.
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