More info needed.

Assuming this a propellor type upflow fan, are the fins of the coil dirty?

On most common fans if the air flow is more and more restricted
amps will drop, not increase like on a piston water pump.

If blocked airflow is corrected and airflow now doubles,
Amps will not just double too,
but will increase slightly less than 2 x2 x2=8
( rises by the power of 2.5 or so)

Ask the tech to measure the fans airflow before changing the motor.
If the tech is well trained
he should have already checked the 3 phase motor leads for
continuity, voltage balance, current balance, and “megged” the leads to ground.