Having problems with your Dishwashers ?

When I start the dishwasher, it sounds normal. A few minutes after it starts, it makes a loud, thumping noise that lasts for several minutes. After a while, it stops making noise, but about half way through the cycle, it starts making the loud, thumping noise again. It's loud, annoying, and does not get our dishes clean. We have to wash several dishes by hand AFTER we have run the dishwasher.


Answers :

I have made the assumption that your d/w is a siemens machine, however if not pls repost with the make and model.
\015\012There are a few possibities...
check the spray arms are clear by removing any blockages in the holes, check that there is enough water entering the d/w by removing the lid (no screws on lid, there are two clips at the rear, release them and the whole lid will slide back and then off) and take the two t20 screw off the left side panel at the front you should check the pressure chamber and its hose are not blocked. Use the link and go to page 4, part 0428 and 0426. Whilst you have the side panel of, fill the d/w and once the inlet valve closing, reset the machine and watch the drainage thru the left chamber is flowing ok. You can also remove 0420 (remove t20 screw via the sump after all filters are removed) this will expose the pump impellor and you can check for any obstruction. If the d/w is connected via a sealed spigot to the sink, remove the grey hose and unscrew the spigot adaptor from the sink and ensure there are no blockages.
You have not mentioned that the d/w is not heating so I assume it is, as this could be a problem also. However, although the machine is heating the water is distributed via a motor attached to the heater box that alternates the water between the top and bottom basket. If this is faulty you will find that the d/w will clean one of the baskets beautifully and the other not at all. (unfortunately this will req a new instantaneous water heater which is best fitted by an expert)
https://www.bosch-eshop.com/eshop(bD1lbiZjPTAwOQ==)/bosch/gb/prodp.htm?prod=SL84A306UC%2f26&ESHOPTYPE=S
I appreciate that this is not you model but the parts should be in the same position.
If you req any further assistance pls repost, if this is helpful pls leave feedback.
Best of luck
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