Bosch washing machines Error Codes

Bosch publishes model-specific washer support and a smaller public list of common display codes. The two codes below have current UK support pages with clear owner checks.

Before you use this table: Bosch lists other codes, including E16 and E33, but the exact meaning and action can depend on the model. Use the E-Nr on the rating plate for model-specific documentation when a code is not covered here.

Error code

Leading zeros, dashes and spacing do not matter: E01, E-1 and E1 find the same row.

Manufacturer-documented Meaning taken from a manufacturer manual or support page. Reported Consistent owner and technician reports; the manufacturer has not published this code. Confirm with them if it matters.

Code	What it means	Where to look first
E18Also shown as: E:18Bosch washing machines that use E18; confirm with the E-Nr manualManufacturer-documented	Bosch links E18 to a blockage in the filter/pump path or a kink/blockage affecting the water path. Likely causes Blocked drain-pump filter or pump housing Kinked or blocked hose Source checked 2026-09-19	Switch off and unplug the appliance before accessing the service flap Drain retained water safely, then clean the pump area only as Bosch describes for the model Check the relevant hoses for trapping or kinks Washing Machine Not Draining? Diagnose the Real Cause →
E23Also shown as: E:23Bosch washing machines that use E23; confirm with the E-Nr manualManufacturer-documented	The washer has detected a leak or water in the base plate. Likely causes Internal or external leak reaching the base protection area Source checked 2026-09-19	Turn off the water supply tap immediately Do not keep running test cycles to find the leak Use the model-specific Bosch support route or arrange repair Stop: Turn off the water supply and stop using the washer until the leak has been found. Washing Machine Troubleshooting: Diagnose Common Problems by Symptom →

Code

What it means

Where to look first

E18Also shown as: E:18Bosch washing machines that use E18; confirm with the E-Nr manualManufacturer-documented

Bosch links E18 to a blockage in the filter/pump path or a kink/blockage affecting the water path.

Likely causes

Blocked drain-pump filter or pump housing
Kinked or blocked hose

Source checked 2026-09-19

Switch off and unplug the appliance before accessing the service flap
Drain retained water safely, then clean the pump area only as Bosch describes for the model
Check the relevant hoses for trapping or kinks

Washing Machine Not Draining? Diagnose the Real Cause →

E23Also shown as: E:23Bosch washing machines that use E23; confirm with the E-Nr manualManufacturer-documented

The washer has detected a leak or water in the base plate.

Likely causes

Internal or external leak reaching the base protection area

Source checked 2026-09-19

Turn off the water supply tap immediately
Do not keep running test cycles to find the leak
Use the model-specific Bosch support route or arrange repair

Stop: Turn off the water supply and stop using the washer until the leak has been found.

Washing Machine Troubleshooting: Diagnose Common Problems by Symptom →

Code not listed? Not every brand publishes its codes, and we only list meanings we can trace. Two things help:

Sources and when they were checked

Bosch UK: E18 Washing Machine Error checked 2026-09-19
Bosch UK: Washing machine E23 error checked 2026-09-19

Codes can vary by model and generation. If the wording in the manual for your exact model differs from this table, follow the manual for that machine.