Having problems with your Bosch Dishwashers ?

Bosch dishwasher won't drain...it washes the dishes great but there is water remaining in the bottom after the wash cycle is finished. I have done the following with no results: 1. checked drain hose to sink and it was clear of debris 2.removed filter and cleared it out as well as removed the bottom cover and checked there...looked clear. please help


Answers :

Hi
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\015\012There are a few things to check with this problem on Bosch Dishwashers.
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\015\012As always for safety reasons disconnect the dishwasher from the mains supply before carrying out these checks.
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\015\0121) I see you have already checked for blockages and cleaned the filter - however with most Bosh dishwashers in the very bottom of the internal sump, under the filters, you may find a single Torx screw. If you remove it you get access to the impeller of the drain pump. Sometimes crud will get trapped under these blades restricting the pump. Tweezers may help in the removal of this. The impeller blades should move freely with only a bit of resistance.
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\015\0122) Is the drain hose connected to a sink drainage system or a stand-pipe? If its connected to the sink the drain hose must loop downwards prior to the connection. Otherwise water will siphon back in from the drain end. If the drain is in a standpipe so its important that the drainpipe sits loosely to allow an air gap - again preventing water siphoning back into the machine.
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\015\0122) Faulty/partially sticking non return valve - This is located adjacent to the impeller of the drain pump on most Bosch dishwashers. Its made of black rubber and its top edge will be visible when you have the drain pump cover off...carefully take hold of the top of it with long nose pliers or stout tweezers and pull up and out. Try a cycle without it - if the dish washer drains you should replace this item.
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\015\0123) If these checks do not make a difference the fault is either with the drain pump - (check continuity) or the timer/control (service attention required).
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\015\012Hope this helps. Please do rate my answer. Many Thanks.
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