Problem with blower after workshop repair on Audi A3

Hello everyone, I have a problem with my Audi A3 Sportback 2.0 Diesel with 150 hp. After a workshop repair, during which a xenon headlight was replaced, air is no longer coming out of both air vents in the center of the vehicle. It appears that the associated flaps are in the closed position and are not working. However, the blower is clearly audible and adjustable. The air flow from the nozzles on the left and right near the side windows is normal. Could it be that the servomotors have been affected by a fault when connecting the headlight? Has anyone had similar experiences or can help me further? Many thanks in advance. Greetings, Ralf.

(Translated from German)

Check if the climate control settings are correctly set to direct air to the center vents. Sometimes, the settings might have been inadvertently changed during the repair. If the settings are correct, try resetting the climate control system by disconnecting the car battery for a few minutes and then reconnecting it. This can sometimes resolve electronic glitches. Let me know if this helps or if you need further assistance.