Bosch
Bosch Washing Machine Drain Pump & Filter840789
Suitable for Bosch, Balay, Constructa, Koenic, Neff
Stock Code: 1008324
£19.95inc. VAT
£16.63 ex. VAT
Due Back In Stock: 27 Jul 2026
Moderate DIY repair
A confident home repairer can do this with basic tools.
01
Compatibility Check
02
What this part does
Pumps the waste water out and traps debris before it reaches the pump.
03
Will this fix my appliance?
Tick the symptoms your appliance is showing. We’ll tell you how confident we are this part is the fix.
04
Error codes related to this part
Error codes are model dependent, so the same brand may have more than one listed.
| Code | Brand | What it means | Confidence |
|---|---|---|---|
| E18 | Bosch | Means a drainage failure, where the machine cannot empty water within the allowed timeframe. It is usually caused by a blocked drain pump filter or a kinked hose. | High |
| E2 | Bosch | Means a drainage failure that stops the machine mid-cycle because water is not emptying within the required time. It is usually caused by a blocked pump filter, a kinked drain hose, or a failed drain pump. | High |
| E20 | Bosch | Means a drainage problem where the machine cannot empty water and stops the cycle to prevent flooding. It is usually caused by a blocked filter, an obstructed pump, or a kinked drain hose. | High |
| E28 | Bosch | Means a flow sensor fault, where the water is not draining properly or the sensor cannot detect water flow correctly. It is usually caused by a malfunctioning turbidity sensor (dirty water sensor) or a drainage blockage. | Medium |
| E4 | Bosch | Means a drainage failure. It is usually caused by a blocked pump filter, a kinked drain hose, or a faulty drain pump. | High |
| F3 | Bosch | Means a drainage failure, where the machine has not emptied water within a set time. It is usually caused by a blocked pump, filter, or hose. | High |
| F5 | Bosch | Means a drainage failure where the machine cannot empty water, or on certain models a motor fault. It is usually caused by a blocked filter, an obstructed drain hose, a faulty drain pump, or worn carbon brushes. | High |
| F7 | Bosch | Means a drainage system fault that prevents water from emptying and triggers a door lock safety issue. It is usually caused by a blockage in the filter or drain hose. | High |
| F8 | Bosch | Means a drainage problem. It is usually caused by a bent pipe connected to a pressure sensor, or debris or mechanical failure in the drain pump. | High |
| F9 | Bosch | Means a drainage failure where the machine cannot drain water, causing it to stop mid-cycle. It is usually caused by a blocked pump filter, clogged hoses, or a faulty drain pump. | High |
| E12 | Siemens | Means the machine cannot empty water properly. It is usually caused by a blocked drain filter, an obstructed drain hose, or a faulty drain pump. | High |
| E18 | Siemens | Means the machine has failed to drain. It is usually caused by a blocked drain pump, a clogged filter, or a kinked drain hose. | High |
| E2 | Siemens | Means the machine cannot detect that the door is securely closed, or it is unable to drain water. It is usually caused by a faulty door lock or a drain pump that is not operating. | Medium |
| E21 | Siemens | Means the machine cannot empty water within the time allowed, taking too long to drain and prompting a shutdown to prevent flooding. It is usually caused by a blocked pump filter, an obstructed drain hose, or a faulty drain pump. | High |
| E3 | Siemens | Means the appliance is not draining water properly. It is usually caused by a blocked drain pump, a clogged filter, or a kinked hose. | High |
| E30 | Siemens | Means there is a problem with the drainage system, with the outlet hose connected too high, kinked, trapped, or extended too far, or the drain pipe or outlet hose blocked. It is usually caused by a displaced or blocked drain hose. | High |
| E36 | Siemens | Means the machine cannot empty water within the time allowed. It is usually caused by a blocked filter, an obstructed drain hose, or a faulty pump. | High |
| E4 | Siemens | Means water is not draining from the machine, or the door is not locked properly so the cycle cannot run. It is usually caused by a blocked filter or pump, or a door that is not locking. | High |
| E6 | Siemens | Means the machine cannot empty water within the designated time. It is usually caused by a blocked pump filter, a kinked drain hose, or a faulty drain pump. | High |
| E8 | Siemens | Means there is a drainage failure, water pump issue, or water level error. It is usually caused by blocked supply hoses or filters, or a drain pump that is not operating. | High |
| E81 | Siemens | Means the door mechanism is faulty and preventing unlocking, or the pump cannot drain water, stopping the cycle from finishing. It is usually caused by a faulty door lock or a blocked drain pump. | Medium |
| F3 | Siemens | Means the machine has not emptied water from the drum within the expected time, often stopping mid-cycle with water still inside. It is usually caused by a blockage, a drain pump that is not operating, or a jammed filter. | High |
E18High
Bosch
Means a drainage failure, where the machine cannot empty water within the allowed timeframe. It is usually caused by a blocked drain pump filter or a kinked hose.
E2High
Bosch
Means a drainage failure that stops the machine mid-cycle because water is not emptying within the required time. It is usually caused by a blocked pump filter, a kinked drain hose, or a failed drain pump.
E20High
Bosch
Means a drainage problem where the machine cannot empty water and stops the cycle to prevent flooding. It is usually caused by a blocked filter, an obstructed pump, or a kinked drain hose.
E28Medium
Bosch
Means a flow sensor fault, where the water is not draining properly or the sensor cannot detect water flow correctly. It is usually caused by a malfunctioning turbidity sensor (dirty water sensor) or a drainage blockage.
E4High
Bosch
Means a drainage failure. It is usually caused by a blocked pump filter, a kinked drain hose, or a faulty drain pump.
F3High
Bosch
Means a drainage failure, where the machine has not emptied water within a set time. It is usually caused by a blocked pump, filter, or hose.
F5High
Bosch
Means a drainage failure where the machine cannot empty water, or on certain models a motor fault. It is usually caused by a blocked filter, an obstructed drain hose, a faulty drain pump, or worn carbon brushes.
F7High
Bosch
Means a drainage system fault that prevents water from emptying and triggers a door lock safety issue. It is usually caused by a blockage in the filter or drain hose.
F8High
Bosch
Means a drainage problem. It is usually caused by a bent pipe connected to a pressure sensor, or debris or mechanical failure in the drain pump.
F9High
Bosch
Means a drainage failure where the machine cannot drain water, causing it to stop mid-cycle. It is usually caused by a blocked pump filter, clogged hoses, or a faulty drain pump.
E12High
Siemens
Means the machine cannot empty water properly. It is usually caused by a blocked drain filter, an obstructed drain hose, or a faulty drain pump.
E18High
Siemens
Means the machine has failed to drain. It is usually caused by a blocked drain pump, a clogged filter, or a kinked drain hose.
E2Medium
Siemens
Means the machine cannot detect that the door is securely closed, or it is unable to drain water. It is usually caused by a faulty door lock or a drain pump that is not operating.
E21High
Siemens
Means the machine cannot empty water within the time allowed, taking too long to drain and prompting a shutdown to prevent flooding. It is usually caused by a blocked pump filter, an obstructed drain hose, or a faulty drain pump.
E3High
Siemens
Means the appliance is not draining water properly. It is usually caused by a blocked drain pump, a clogged filter, or a kinked hose.
E30High
Siemens
Means there is a problem with the drainage system, with the outlet hose connected too high, kinked, trapped, or extended too far, or the drain pipe or outlet hose blocked. It is usually caused by a displaced or blocked drain hose.
E36High
Siemens
Means the machine cannot empty water within the time allowed. It is usually caused by a blocked filter, an obstructed drain hose, or a faulty pump.
E4High
Siemens
Means water is not draining from the machine, or the door is not locked properly so the cycle cannot run. It is usually caused by a blocked filter or pump, or a door that is not locking.
E6High
Siemens
Means the machine cannot empty water within the designated time. It is usually caused by a blocked pump filter, a kinked drain hose, or a faulty drain pump.
E8High
Siemens
Means there is a drainage failure, water pump issue, or water level error. It is usually caused by blocked supply hoses or filters, or a drain pump that is not operating.
E81Medium
Siemens
Means the door mechanism is faulty and preventing unlocking, or the pump cannot drain water, stopping the cycle from finishing. It is usually caused by a faulty door lock or a blocked drain pump.
F3High
Siemens
Means the machine has not emptied water from the drum within the expected time, often stopping mid-cycle with water still inside. It is usually caused by a blockage, a drain pump that is not operating, or a jammed filter.
Don’t see your code? Different model years sometimes use different codes. Get in touch with our parts team and we’ll help you identify the right replacement.
05
Fitting Guidance
MediumGeneral fitting guidance. The exact steps can vary slightly with the make and model of your washing machine.
Safety: Switch off and unplug at the mains before you start.
You’ll needScrewdriverPliersTowelShallow tray
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06
Specifications
- Part Number
- 840789
- Alternative Part Numbers
- 00145776, 00145809, 00145897
- Genuine Spare Part
- No
07
More Details
A genuine drain pump and filter body housing for your wash cycle’s draining phase. Pumps the water out of the machine through the drainage hose.
The filter body housing holds a filter that catches lint, debris, and foreign objects from the laundry water. Keeps them from clogging or damaging the drain pump.
Easy access to the filter makes regular maintenance and cleaning simple. A clean filter means the washing machine works well without drainage problems.
This drain pump and filter body housing suits Balay, Bosch, Constructa, Koenic, Neff, Siemens, and Viva washing machines.
Before ordering, please verify that this kit works for your model using our compatibility checker.
08
Customer Reviews (3)
5.03 reviews
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Bosch washing machine pump
Our Bosch washing machine showed an E18 fault code, indicating a failure to empty. After draining the machine, the filter trap was checked to ensure there was no blockage preventing the pump from turning. Placing a shallow tray in front of the still open trap to catch any draining water allowed a small quantity of water (about half a litre) to be poured into the drum(inlet) and down the outlet drain hose. It drained freely out of the open filter trap indicating that the likely cause was a failed pump, which substitution confirmed. The price of the new pump including next day delivery, meant that the replacement pump was delivered within 24 hours of ordering. The new pump, was directly interchangeable with the old one so fitting was straightforward. The pump is accessible by removing the front panel (follow the procedure for changing the door boot seal but only the outer seal needs to be released from the front panel). The pump is held in situ by 2 self tapping screws at the front of the pump housing. After re-assembling, a rinse and spin programme was selected to confirm that the water was draining (pump now working normally) and there were no leaks. The old pump was totally done with a very worn bushing on the impeller end allowing a built up of fine silt and other fine particles to enter into the pump drive mechanism. This caused the pump to be very noisy emanating a loud clicking or ticking noise when operating ( the pump noise was louder than the motor drive noise). There were none of the previous sounds when the new pump was fitted. Can’t remember reading any similar reviews but may have suspected the pump beginning to fail earlier, if the noise indication had been recognised as pump noise. Hope this helpful to others.
Thomas Forbes · Kinross ·
Quality
Value
Ease of Fitting
Great replacement
Great replacement for Bosch drain pump and in a really good price
GREG MORAITIS · Poole ·
Quality
Value
Ease of Fitting
Mr
It's a good order I like this order And I buy again
Michal Gawryjolek · Knottingley ·
Quality
Value
Ease of Fitting