328 air vent damper synchronization with controller

Hi All
Can anyone point me to a thread/give advise on how to synchronise the air vents with the centre console controllers? i.e. so when all centre console controller lights are on, vents are blowing on screen, no lights on, vents are blowing downwards.
Over the winter my drivers side has decided that with the controller set to one light on all the air is to screen; several presses of controller later with no lights on, the vent eventually moves to blow downwards.
All the controller lights work and I can hear a motor whirring away when I push the controller. Its just desperately out of synchronization.

 

Thanks, brilliant. Worked perfectly.
But I wonder why they go out of calibration?

 

They are very sensitive to adjustment.
Could be that the battery was on an optimizer over winter and if there's a voltage stabilizer in the circuit its not working 100%?
The controllers always seem to be more representative of the actual damper position when car is used quite frequently.