Question about Bosch Dishwashers
I have a Bosch washer myself, but mine is quiet. Some things to check:
Have you (ever) cleaned it? Pull the lower rack out and reach in and turn the knob on the bottom just in front of the spray assemble in the middle. Take out the filter and clean it, a small brush may help. Replace the filter.
Intermittent noise sounds to me like the water discharge pump has a problem. The washer has to have some way of pumping water out of the tub into a drain. This runs intermittently throughout the cycle. I would look there for a problem. Perhaps you have something in the pump itself that is rubbing and causing noise. You may only need to remove an obstruction, provided you can find it. It is possible you may need to replace the discharge pump, which you can probably find online with a little searching.
If you want to DIY, you can probably find a manual online, perhaps even troubleshooting procedures. If not, call a service tech. This does not sound serious to me, but will become so with time.
The Bosch is a good and very quiet washer, but not without it's quirks. They are great when they are running properly.
Posted on Mar 17, 2018
Check impeller in pump for foreign object
Posted on Mar 17, 2018
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Posted on Jan 02, 2017
It could be the impeller on the motor. The impeller fits over the shaft of the motor and might have split/broken up. That funny noise is probably the shaft spinning inside the damage impeller. Fortunately the impeler is fairly inexpensive and easy to replace. I believe there are one or two parts/covers to remove that are held in by a roughly half dozen torx screws.
Posted on Jan 10, 2008
How deep do you want to get into this?It sounds like the wash pump motor bearings that are worn.You can pull the unit out flip it over and wd40 the bearings in the motor or you can replace the bearings.Try to lube them first.
Posted on Feb 24, 2008
A loud high pitch whine while running the dishwasher means that there is something caught in the chopper assembly. To get to the chopper assembly you need to take the racks out and take the pump apart from the inside of the dishwasher. The chopper assembly looks like a metal grate with holes in it. And it might not even be stuck in the grate but somewhere in the pump area due to the water being pumped out, so the best idea is to take the whole thing apart and clean everywhere. However I do not recommend doing this unless you are completely certain you will remember where the screws and gaskets go, otherwise you risk damaging your pump or house from a leak or improper installation. You have been warned.
Posted on Jan 15, 2009
if you have a torx 20, and torx 15 screw driver, you an remove the screws from the top plate of the wash motor, and underthere youll see another t15 screw converingthe "chopper" assy, sounds as if a seed, of chicken bone, perhaps apiece of glass hasgottne down there
Posted on Jan 25, 2009
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.
the other humming sound can come from the next component that activates is the watervalve. make sure you dont have a kinked water intake line. otherwise its a bad valve. i have had to change a few of those water valves out already but not for a hum noise on your model. you have a new style water valve. when brands make new parts we get problems fast sometimes..
Posted on Mar 19, 2009
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