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Do you have a volt meter to see if we are getting power to the motor?
Did he test the capacitor? If we have power issue is going to be either a bad capacitor or bad motor.
What was his diagnosis? Was motor running when he left?
If verified we have power to motor, It has to be either a bad capacitor or bad motor. You could try capacitor first as it I less than 10 bucks.But if that does not solve problem you will have to replace motor.
If you are handy with tools you can replace for less than half what he will charge.