Dish washer model KUDS01ILBS2 starts normally then in wash cycle the control panel makes a buzzing noise and progresses slowly. The dry cycle ends early leaving dishes a little damp. Ran diagnostics everything was normal until test interval 2 and 1 when the Sensing/soaking LED came on. If I am reading the diagnostic chart correctly that means a bad Pressure Switch if it comes on in interval 3 but what does it mean in interval 1 & 2? What is causing the buzzing control panel and how to repair? Thanks for your help.