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      01-01-2021, 09:35 AM   #11
MotoWPK
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Drives: '13 128i vert, '14 X5 40i
Join Date: Apr 2013
Location: Colorado

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From my readings, this can be a symptom of a leaking evaporator. To test, you need to have the A/C system evacuated and a dye included in the re-charging of the system. Operate the system for a while, then visually inspect the evaporator. If it is leaking, dye will be visible (and it appears leaks typically occur where the evaporator tubes enter the tubesheet).
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