^^THIS^^...........Example, you can not run a blower like a furnace/ AC squirrel cage OUT OF the ducted evironment it was designed for, without reducing motor power (speed wires selection) They will "over current."
Also is it possible the motor was wrongly replaced (too small or too high RPM) or likewise blades replaced with wrong blades?
Other than that you may have a partially shorted winding, which is very difficult to test for
