Thanks again!
I've just checked the "Recirculation Door" - it moves freely and according to the spec (opens at MAX and closes when flow is sent to the floor). It has zero effect on the air flow strength. I move it with a hand - nothing. It means there is nothing blocking the air flow before it enters the blower motor.
Checked one more time electrical actuators - they move nicely and the air flow dies gradually as it moves from cold to hot.
To me it looks like the block is behind the flaps/doors operated by the electrical actuators.
Any suggestions?
