Question about Siemens 24 in. SE20T590GB Free-Standing Dishwasher

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When switch on, struggles to empty water, pipes

When switching on, struggles to empty water, pipes make a banging noise?

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There are a few possibities...
if you remove the lid (no screws on lid, there are two clips at the rear, release them and the whole lid wil 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 497570 and 298556. You can also remove 165263 (remove t20 screw via the sump after all filters are removed) this will expose the pump impellor and you can check for any obstruction. There may be water in the base of the d/w (base as below the tank, not under the filter) this will activate the flood safety and give the scenario you have described, so check valve, hoses etc for leaks.
https://www.bosch-eshop.com/eshop(bD1lbiZjPTAwOQ==)/bosch/gb/prodp.htm?prod=SE20T590GB%2f27&ESHOPTYPE=S

Posted on Jul 11, 2010

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html#bang
http://waterheatertimer.org/images/Flow-rates-water-hammer-600.jpg

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