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Customer Questions and Answers for Drain Pump by Bosch

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Manufacturer Part
4.89 (64)
By: Bosch
Part Number: OEM11989995
Manufacturer Part Number: 00642239

The Drain Pump is an OEM replacement part for Bosch dishwashers. It is responsible for pumping out dirty water from the dishwasher tub at the end of each cycle. The drain pump works to thoroughly empty the tub in a timely manner to facilitate a smooth transition to the next cycle.  

Causes of a bad drain pump can include a clogged impeller or blockage of debris inside the pump housing that inhibits proper water flow. 

Symptoms of a bad drain pump include:

  • Incomplete draining of water at the end of cycles 
  • Water remaining or pooling at the bottom of the tub
  • Loud grinding or clicking noises emanating from the pump area
  • Cycles failing to advance or resume properly

This OEM Bosch part is also compatible with Thermador, Gaggenau, and some Kenmore dishwashers.

Note: Due to a factory design change, connector part# 00623143 may also be needed.

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Questions & Answers

For Bosch Drain Pump (Part Number: OEM11989995)

1 Answer

Cindy, you will want to turn the breaker off and inspect underneath the dishwasher tub and in between the tub and base. On the left hand side of the base section is a foam float that acts as a leak sensor and if water starts filling the base, it will shut the water valve off and only allow the drain pump to operate. If there is water in the base section, you will want to clear it out and inspect for where the water leak is originating.

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1 Answer

Gabriel, Check to make sure that there is nothing caught in the pump or the circulation pump and if not then you may have received a faulty pump.

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Dkingsto for Model Number SHX46A05 UC/14 (FD 8406 01454)

Bought Bosch 642239 Drain Pump replacement. The vane on the motor is different from the one I pulled off my machine - more blades on the new white one. Mine has a blue vane/gear with less blades. Installed it any way and the drain cycle works - I can pop the door open and see the impeller agitating the water at the drain. BUT the water is not getting pushed out of the machine. I removed the rubber backflow stop, I vacuumed the drain line clean and blew air back into it to make sure it was not obstructed - I held the door open to see air blowing into the machine - so the line to the sink is definitely clear. The machine will still not drain the water inside - it just gets blended around by the drain impeller and will not go through the drain line. (with or without backflow stop installed) Any ideas?

1 Answer

DKingston, You will want to check for clogs in the drain line as this drain pump is showing to be the correct one for your unit.

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1 Answer

Alan, you most likely had/have a "hard" object in the sump assembly. It may have lodged in the drain pump inlet area and damaged the drain pump or impeller 00642239 / 00642239 and the dishwasher won't drain. " Remove power to the dishwasher. Remove toe kick/base cover, pull up terminal cover and disconnect wires (using screwdriver to unlock locking terminals). To remove pump, pull latch (on circular collar) & rotate pump clockwise (cw). To install new pump, insert @ 2:00 position & rotate counterclockwise (ccw). Clean water & debris from base, then check float operation. Connect wires, then install base cover & toe kick." Then check for proper operation and drain.

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Mark Kent for Model Number Bosch S40T42UK/25

Hi, The dish washer wasn't draining water away. After investigation(google, youtube etc), I managed to find some thread around the impeller, but will probably need to remove the actual drain pump in order to gain better access to check it thoroughly for any more debris. I know how to do this, but how can I check that the drain pump actually works and isn't burnt out for example? I'm thinking of buying a cheap multimeter, but wouldn't know how to check the drain pump is actually working correctly. Many thanks

1 Answer

Mark, once you remove the drain pump, and disconnect the wires, set the meter on the RX1k or 2k scale, place your meter leads across the two terminals, the meter should indicate 14K ohms resistance(+/- 10 %) indicating the motor windings are good. This doesn't really "guarantee" the motor works, just that it should. You may want to use the tech data sheet, program into the test mode and run/operate the drain pump. If you're careful, you can attach a 120 VAC test cord to the motor terminals, plug the test cord into an outlet and see the motor run.

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1 Answer

Franccois, This issue sounds like the float switch is faulty if it will only drain when lifted.

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1 Answer

Jim, You will want to access the control board and test to see if the control is sending power to the drain pump during the drain cycle. If there is no power then the control board would be the issue.

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1 Answer

Hello Jim, This can be a door switch or the unit is out of level, not allowing the door switches to make properly. This can occur if it is not properly secured to the countertop/cabinet.

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1 Answer

Jim, The motor would not have oil inside of it and would be a shaft seal that has failed. You will want to replace the drain motor for this issue.

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