Before winter i tries to fix one of my mixing temperature step motor support (passenger side), the plastic support is broken and the step motor operate freely but it can't open and close the air mixing flap that way.

I found out very helping solutions / hints on the forum historic messages to repair the support, but i wonder if there is a resetting procedure for the step motor.

In other words, having operate freely up to now will the set motor find out is natural open and close positions itself after reinstallation in a new sturdy support or will i have to force it in some particular start up position ?