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Re: Access to Bosch dishwasher pump
To access the pump, first bail and sponge out any water in the machine's tub. Then tip the machine over on its front, using a heavy blanket or pad to protect the dishwasher's finish. Remove the back service panel. The pump is usually located along the bottom.
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The only way to eliminate a pump issue is to actually remove the pump and check it internally, it doesn't take much to block them and also the impellers can come loose, It sound like you are handy with tools so i suggest removing the drain pump and while it's off check the hoses that run to and from the pump for obstructions and make sure the impeller is not loose.
just remove the screen from inside you will see a torx screw to the left side of the sump remove it. pull the protective cover of the drain pump impeller. once removed you can see if anything is in the drain. if the impeller seems fine you eithe have a bad drain pump or something is in your drain between the dishwasher and the sink clogged.
pump has a blockage-mine was a piece of cloth(fibre) that was stopping the pump turning. Fixed in about 10 mins after i had emptied the water.
Disconnect (electrically) the dishwasher and lay on right hand side-undo bottom cover (2 screws) and remove (mind earth strap) Drain pumpcan be removed by unclipping pump elctromagnet (fiddly) and sliding off.
Now study pump body to determine which way to turn to undo.The pump is plastic and held in position by the plastic molded base-The pump spigot needs to be eased over this stop as the pump is turned.
The assembly can now be remoced for examination/replacement.
Replace as reverse-do not forget the polystyrene float that will have come off(probably).
Hope this helps
without a brand or model number its hard to be sure, but some types have a float cut out switch inside the washer. Its on the bottom inside and kind of resembles a plastic mushroom. The top should lift up and down easily. detergent will clog it up and keep it from moving. Just clean all the soap caked on it and move it up and down to see it it pushes a little switch underneath.