I will be happy to help you out. You say you have replaced the pressure switch?
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It could be possible there is a partial restriction, or even a hole in the pressure switch hose.
Can you pull the hose off the back of the switch and blow through it.
Let me know what you find.
Sorry for the delay, computer issues
Can you pull the hose off the switch and blow through the hose? There may be a partial restriction in the tube where it connects to the bottom of the wash tub.
Also when you put it back on make sure that the end is not damaged in anyway from removing it. Sometimes the end of the hose will get split or a tear in it when you remove it from the switch for the first time.
Double check these things and let me know what you find.
How did you make out. Was there an issue with the hose?
Let me know if you have anymore questions. I will be happy to help you out further.