Thank you for your question.
I see that Jackie S has given you a link to some previously answered questions. I recommend following the advice in the third link. If cleaning the ball does not help and you are using the low-pressure nozzle, I recommend replacing the nozzle.
Please let me know if you need further assistance.
Here is a link to order any parts you need.
Sears Parts Direct
If you do not feel confident repairing this problem yourself, then you can have it repaired by a Sears technician. Here is a link that will provide the nearest drop-off locations:
Sears Home Services
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