Whenever something like this happens, I always try to point out the dates, so people don't go trying to answer the original poster. For what it's worth, I had a 1993 Eagle Vision that went through an evaporator every year! Blasted aluminum.

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Rick Miley
2014 Tesla Model S
2018 Tesla Model 3
2017 Nissan LEAF
Former MB: 99 E300, 86 190E 2.3, 87 300E, 80 240D, 82 204D Euro
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