How to replace Dishwasher pump Bosch, Siemens etc

by / Saturday, 10 January 2015 / Published in Dishwasher, Pumps




The drain pump on a dishwasher will always be located at the bottom of the machine, some can be accessed from the front as in this video, others you can removed from under the base of the dishwasher, But the first thing you need to do is drain the water from the inside using a bowl, I find that the top of a spray tin very useful to remove water from below the filter in the water well.

This video will help you remove the old Dishwasher pump and replace with a new one or to clean it

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Bosch Dishwasher Pumps

You will need to access the pump from the front of the machine on this model as the base does not come off, this video will show you how to replace the pump on all these make but can differ from model to model. Bosch, Siemens, Airlux, ATAG, Balay, Constructa, Gorenje, Imperial, Koenic, Kuppersbusch, Neff, Pelgrim, Pitsos, Thermador, Tecnik, Viva, V-Zug,




Error Codes for Bosch SMS/SH Series and Exxcel/Logixx Dishwashers:

Possible fault codes are E25, E24, these are drain error codes
Fault Code E20
Symptom: Electrical short or break.
Cause: Short or break causing incorrect resistance in winding of the circulation pump or the motor.
Fault Code E21
Symptom: Circulating pump blocked.
Cause: A blockage between the motor or the pump resulting in insufficient water flow.
Fault Code E23
Cause: As error code E20, but this time the electrical problem is with the drain pump.
Action: Replace drain pump if necessary.
Fault Code E24
Symptom: Dishwasher not draining properly.
Cause: Drain filters blocked.
Action: Clean the filters.
Go to: Why is My Bosch Dishwasher Not Draining?
Fault Code E25
Symptom: Dishwasher not draining properly.
Cause: Possibly blocked filters, as above. Otherwise this fault code could indicate a blocked drain pump.
Fault Code E26
Cause: Water switch/regulator problem.
Action: Check water switch and replace if required.
Fault Code E28
Cause: Fault detected with turbidity sensor.
Symptom: Dishes not getting clean. Dirty water in the tub.
To remove the Dishwasher pump see video and follow these steps

  • 1st you will need to drain down the dishwasher.
  • 2nd You will need to remove the lid and the side panels.
  • 3rd Remove the kick strip.
  • 4th Behind the kick strip you will find an access plate this can be removed by undoing the screws and prizing the plate up slightly on either side.
  • 5th Remove any of the wiring that might get in the way of you undoing the dishwasher pump.
  • 6th This pump is held in place with a bayonet fixing. We just need to depress this clip and twist the pump clockwise on this model (on other models the pump needs to be rotated anti clockwise to release it)
  • 7th When the pump comes out you can remove the wiring from it.
    Now you can inspect the pump to see if there are fibers wrapped around it. You can now test the pump with a multi-meter remember the pump in this dishwasher is 54V and is not 240v so don’t try and live test it.

38 Responses to “How to replace Dishwasher pump Bosch, Siemens etc”

  1. Stephen Abraham says : Reply

    BLESS YOU! Couldn’t find help anywhere and then found your guide. Can’t tell you how grateful I am. A rubber band and string were all wrapped around the drain pump so cleaned it all up and fingers crossed we don’t need a new one – but if we do I now know how to replace it.

  2. Andreas says : Reply

    Hi Paul,

    the drain pump of my Neff dishwasher was replaced appr. one year ago. It was noisy and error E25 appeared often.
    Now its noisy again. After start of the program the drain pump is running appr. 10 to 15 minutes (w/o shutting off when I open the door). Then pump stops and the dishwaters operates w/o abnormality. Do you have an idea what I have to exchange or check beside the pump?

  3. Neil says : Reply

    Thanks Paul had string rapped round drain pump as well and didn’t know how to take pump out ur a star and saved us money just before Christmas happy days

  4. Lieven says : Reply

    A big Thank you from Belgium found elastic band wrapped around the axle.
    You saved our New Years dinner!!!

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