Jerrod V Eagle , ID October 16, 2016 Appliance: Thermador DW44ZSB Thermador Dishwasher Dw44zsb: A broken impeller on the circulation pump and a broken water inlet valve. How to replace Circulation Pump Repair Kit. I watched the repair videos and read the reviews for both repairs prior to placing my parts order. Other reviewers had suggested ordering two hoses that could possibly break during the repair, so I did that as they were pretty cheap. I had the repair video for the circulation pump up during the repair and completed the valve replacement during that session. The valve replacement was a piece of cake. I followed the circulation pump repair video exactly, and it went really well. I have a Thermador dishwasher instead of a Bosch, but the only difference was some extra insulation and side panels. The dishwasher acted like new after starting it back up. This is a great site for DIYers. Do-It-Yourself Rating: Repair Time Estimate: 2+ hours