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 note
Technical information and practical tips have been compiled by HELLA in order to provide professional support to vehicle workshops in their day-to-day work. The information provided on this website is intended for use by suitably qualified personnel only.
Reprinting, distribution, reproduction, exploitation in any form or disclosure of the contents of this document, even in part, is prohibited without our express, written approval and indication of the source. The schematic illustrations, pictures and descriptions serve only for the purposes of explanation and representation of the instructions and cannot be used as a basis for installation or assembly work. All rights reserved.
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