Today was the first warm day after our long winter.
The first day my A/C kicked in since a long time.
Cold air is coming-out only from the side vents and the defrost vents, nothing at all from the center vents.
I presume this is due to some jammed/defective vacuum trap actuators hidden under the dash.
Which one?
Do I need to take the car apart to get to it?
Thanks
JackD

Your assumption might be correct, but don't count on it. The pushbutton control unit can also cause this problem. You need to get a manual and do some diagnosis. Especially on these cars, getting deep in there where the dampers are is a HUGE job.

Good luck,

I found the cause of the problem. The problem is with the operator. After having owned this car for 11 years, a pre-senior moment of mine forgot to check if the center vents were opened (round tumb wheel). It was shut solid.
JackD

Jack D, yesterday this operator did the same, my co-pilot (wife) soon corrected the problem, and just charge me a new pair of shoes.
timreid, enjoy your drive

__________________
timreid
1992 400E
euro lights
500E sway bars
210 16in wheels

How wonder how many ''operators'' have paid big money to have their vacuum activators replaced because of such a stupid oversight.
jackD

This very much reminds me of what was said by TV repairmen in the days of the "house call." They said that it would amaze you how many times they went to a house only to find out that the TV had been unplugged and that was the only problem. Usually the housewife unplugged it to plug in the vacuum cleaner and forgot to plug it back in.

As a radar repairman in the Army, we called such "cockpit errors."

Have a great day,