No heat from rear vents

[mkurniawansyah]

Interesting. I would thought anything out from center front vents would be the same going to the center rear.

Have you tried closing all the front vents and see whether heat goes out from the rear vents? I.e. manually set air flow to center position on the idrive and closed all the manual flap via the thumb adjuster?
And check whether rear vents blow the heat.

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