how to replace bad air vent servo

if you hear clicking, humming noise below dashboard and you have problems with ventilation (windshield fogging, low foot air circulation...) you have bad vent servo motor or possible air mix servo motor.
I replaced upper (ventilation direction) servo, air mix servo was ok.
those are on driver side (EU model) seen from bottom.
bad servo motor (scratched contacts on contactor inside) see attached file
It is not so easy to replace this, you have to remove:
driver seat (for easy access)
left air vent
upper and lower plastics around steering wheel
white plastics for leg ventilation
remove 12 batery terminal in trunk!
remove ecu (3screws)-this is most difficult. Two 10mm screws are easy to do it from bottom but one is well hidden and I unscrew it with a lot of rachet extenders (80cm together)
then you can remove upper or lower servo or both with philips screwdriver adapter on rachet and unplug the servo cable


this fix is difficult but i did it in 5 hours and i didn't have to remove the whole dashboard as the mechanics on toyota do (1500eur costs)
Now prius heats and cools as new.
Oh I have 298.000km on it