Mine did this. It was an AC temp module. It it located right of center hump, under the glovebox. It cost me $50. For used part. It looks like a 2x1 inch box with a bunch of little rods on it

There is also one under center console to control the rear AC

BMW salvage

Stockton auto dismantlers
1-800-235-8733

Bavarian auto recyclers. Sacramento
1-800-269-8970

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