Check the expansion valve to under the dash by the evap. I could not find my leak for the life of me and one day I was trying to chase a water leak problem on my carpet. I was pretty sure it was the evap drains, so I pulled all the carpet and my parts tray and found oil and dye all over the expansion valve. glad it wasnt the evaporator.

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1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual