With the above vehicles the function indicator of the AC button (Figure) may suddenly start flashing at higher speeds. In addition, the recirculation air flap is repeatedly opened and closed, often noticeable by a squeaking noise.
In this case the fault should not be sought in the recirculation air system, but the flap control. Replacement of the control unit (Figure) can often rectify the problem.
Important safety notice
The following technical information and tips for practical use have been set up by HELLA in order to offer professional support to automotive workshops in their daily work. The information available here on this website is only to be used by appropriately trained specialist staff.
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