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Bosch Dishwasher SHU3032UC/U12

Leak drain pump runs continuously

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1 reply to this topic

#1 smarsden

smarsden

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Posted 10 December 2011 - 01:11 PM

Bosch dishwasher drain pump found to be running all the time. Found water in drip tray on left side (facing the machine). I mopped up the water, pulled the machine out, and removed the side panels so I could observe it running.
What I found was that near the end of the fill cycle intermittent dribble of hot water is coming out of a vent hole at the top of the fill/drain "manifold" on left side of machine. This happens when the machine is getting its last few spurts of water to satisfy float fill switch and the wash pump has already started. It appears that their is a surge of water coming back down hose that goes from this manifold to the front side of drain pump. This surge of water meets the spurts of water from the fill valve and the dribble occurs out the vent hole.

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#2 Samurai Appliance Repair Man

Samurai Appliance Repair Man

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Posted 10 December 2011 - 03:23 PM

hot water is coming out of a vent hole at the top of the fill/drain "manifold" on left side of machine.




Sounds like the fill valve is bad and allowing water to fill too fast and thus overflow at the fill assy on the side. Replace the fill valve.

Part link ==> Water Inlet Valve





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