When I run the dishwasher I hear it fill with water. Then it goes silent when it is supposed to be spraying. Then I hear it again when it drains the water out. I hear and see the water drain in the air gap. The sprayer arms are not rotating so it is not spraying my dishes. I have looked at the motor when it is supposed to be spraying and the motor is not moving. I have used a screw driver to unsieze the motor and that was a temorary fixed for one wash cycle. The problem started again the very next time I ran the dishwasher. Would I need to replace the motor?