Re: hotpoint blowing main fuse
You really need to get this machine checked out by someone with the correct test equipment and the required skills. You may have already damaged the main control unit by blowing the fuses, any electrical component in the machine can blow a fuse if it is faulty. Click the link in my sig to see if we have someone who can help you.
As a test on the motor you could always unplug the motor and try the machine with the motor isolated, if the circuit breaker does not trip then you have your answer.
Power off at all times when poking around inside.