The problem here is a common one with this model dishwasher, The unit is not pumping enough water at the right pressure to the top spray head, the reason for this is the wash motor has weakened. Unfortunately to fix this the motor would need to be replaced.
To do this the dishwasher would need to be pulled out from under the counter, Once out it would need to be laid on it's back, The wire harness disconnected from the motor then the screw holding the motor in place removed, next you would twist the motor and pull it out.
The new motor would go back in reverse order.Click here to purchase a new wash motor
I have checked with all my suppliers and this one is the only one with this motor in stock, they normally deliver within 3 days.
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