Question about Bosch 24 in. SHY56A05 Stainless Steel Built-In Dishwasher

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Wash Cycle Noise

It makes a humming noise during the wash cycle and there is little water comes thru the spray. The drain filter is clean. Is there anything else to check before replacing the circulating pump???

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fault may be more simple than replacing the whole circ pump. it is probably the pump capacitor which is a cheap part. no need to buy as a bosch spare - you should be able to find a capacitor of the right value from a good elec spares shop. value is printed on the capacitor

Posted on Jul 18, 2008

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Remove the panel at the base of unit below door you should find the tech sheet which will tell you how to place unit into diagnostic, on the spray arms make sure the small holes are clean below the lower spray arm is a screen make sure it is clean not covered or cake with calcium build up if it clogged water cannot pass thru to enter the wash pump you can also remove the screws to take the upper halve apart to inspect the wash pump for any obstruction it is possible you could have a bad motor control or both you didn't mention after the unit fills do you hear the wash pump hum or click

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your model is pretty new. just so you know your warrenty is 1 year parts and labor. 2 years on parts. it should not cost that much money.

there are two components that start before the circulation pump.(wash noise you hear)

first sounds you hear will be the drain pump. usually rattling noises if something is in it but it can make a hum noise if something is jamming the drain propeller up. which is accessible with a T20 torx driver. take the filters out and the mesh filter. and unscrew the screw in the base towards the left. pull out whatever is lodged.

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faults not related i would think is there a low humming noise when supposed to be wsahing? if so this is the motor capacitor faulty in all probability. this is a cheap part and easy to replace. otherwise, check if power to pump. if no power then points to a module fault. if there is power, points to a motor fault

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