My Bosch Dishwasher model shx46a05uc/23 won't advance through the cycles. The water heats to well above the temperature from our water heater and it will drain, but it runs forever without advancing. We have been hitting cancel/drain and selecting a different cycle to get it to advance, but it still takes a long time and the dishes are not getting clean. Do we need a new control panel? If so, how difficult is it to replace? And it is worth it for a dishwasher 8 years old? Thanks!