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You may have some luck removing and disassembling the ACC control unit and re-soldering connections on the circuit board. I think these account for most of the HVAC failures on these cars. If you told me that you had a 760, the first thing I would have ask is "does the heat work?" because these controllers are so troublesome. Maybe you can find a junkyard unit and take it apart to try the soldering first, rather than tearing into your own.
Good luck!
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Rob Bareiss, New London CT ::: "Roterande Fläkt Och Drivremmar!"
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