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E36 M3 Strange A/C problem - He;lp needed.

Discussion in 'E36 M3 (1995-1999)' started by kxlara, May 23, 2011.

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    We have a '98 M3 Convertible where the HVAC system works great except.... if you have the blower on everything is fine, until you push the a/c button. As soon as you do it, it's like all of the vents are shut off. You can hear the blower still at the same speed, you can feel a trickle (and I mean a trickle) of ice cold air come out, but it's like it has a bad servo motor that is closing all of the vents. It only does this when pushing the a/c button and it doesn't matter if the re-circulate is on or off.

    Any ideas? I'm guessing that it's one of the motors in that control the flaps, but I don't know which one and if it's on the drivers or passengers side.

    Thanks in advance for any assistance!!

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