W126 420 SEL AC Ventilation issue
 

Hi

Il have an issue with the ventilation system when in AC Mode
When I press the EC (economy mode meaning the compressor isn’t engaged) I have air coming out from all the adjustable air outlets with fan set to Maximum, Minimum or Auto speed.

If I engage the AC in cooling mode, either in Normal setting or Bi-level mode the air will come from all the adjustable outlets but after 10 to 20 secondes I can hear the air valves switching and I won’t get anymore more air coming from the adjustable outlets.

I know that, in heating mode, air will be only periodically emitted from the middle adjustable outlets

Any clues ?

Thank you