Dan R Portland , OR February 28, 2016 Appliance: Model BOSCH Loud 'grinding' noise and no water circulation Using a combination of videos from youtube and appliancepartspros.com, I narrowed down the issue to the circulation pump. The motor was fine but the impeller piece had broken off. After replacing the rear pump housing and installing the circulation pump repair kit everything is running fine. The job seemed very overwhelming at first but using the videos helped get me through... 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 2+ hours