Error code guideE27 / F27

Bosch washer E27 / F27 error: the door-lock signal is abnormal

Bosch washer E27 / F27 indicates a pressure-sensor fault on supported models. Bosch states that this fault is not a normal user repair and recommends arranging service.

Model check required. Bosch documents E27 / F27 as a pressure-sensor fault. Confirm the exact E-number before service because sensor layout and diagnostic procedures vary between washer generations.

Reviewed Sep 4, 20264 minute guideWashing machineSelected Bosch washing machine model families

Quick answer

Bosch washer E27 / F27 indicates a pressure-sensor fault on supported models. Bosch states that this fault is not a normal user repair and recommends arranging service.

Start here: Record the exact E27 / F27 display. Confirm the code and full Bosch E-number before applying service information because error-code sets can vary by platform.

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Guided check

Match the symptom, then work through the safe checks.

0/2 checked

1. What best matches what you observe?

2. Complete only the checks that are safe for you.

Record the exact E27 / F27 displayConfirm the code and full Bosch E-number before applying service information because error-code sets can vary by platform.SafeStop the cycle if water level looks abnormalIf the machine is overfilling, underfilling, or behaving unpredictably, do not keep restarting cycles.Caution

Do not open pressure-system componentsBosch says the E27 / F27 pressure-sensor fault cannot be rectified as a normal user-level repair.Professional

Arrange Bosch servicePersistent E27 / F27 needs model-specific diagnosis of the pressure sensor, sensing path, wiring, and control input.Professional

2 user-level checks are available in this guide.Stop immediately if any warning condition applies.

Show stop conditions

Water level is abnormal or the machine overfills
E27 / F27 returns after restart
Pressure sensor, hose, wiring, or control diagnosis is required

Likely causes

The pressure sensor is not reporting the expected water-level signal
The pressure-sensing path or its connection is abnormal
Sensor wiring or the control input cannot read the pressure signal correctly
The washer continues to detect the pressure-sensor fault after restart

Quick checks, in order

Record the exact E27 / F27 display

Confirm the code and full Bosch E-number before applying service information because error-code sets can vary by platform.

safe

Stop the cycle if water level looks abnormal

If the machine is overfilling, underfilling, or behaving unpredictably, do not keep restarting cycles.

caution

Do not open pressure-system components

Bosch says the E27 / F27 pressure-sensor fault cannot be rectified as a normal user-level repair.

Professional

Arrange Bosch service

Persistent E27 / F27 needs model-specific diagnosis of the pressure sensor, sensing path, wiring, and control input.

Professional

Is the washer reporting a pressure-sensor fault rather than a door or drain condition?

Water level appears wrong when the code occurs

Stop the cycle and arrange service; incorrect pressure feedback can affect fill-level control.

The code returns immediately after restart

Do not keep power-cycling. Bosch directs E27 / F27 faults to service rather than repeated user resets.

There is leakage or uncontrolled filling

Shut off the water supply if safe and stop using the washer until it is inspected.

Stop and get qualified help when

Do not continue troubleshooting if any of these apply:

Water level is abnormal or the machine overfills
E27 / F27 returns after restart
Pressure sensor, hose, wiring, or control diagnosis is required

Official support and model manuals

Use the full model number from the rating label. The manufacturer manual is the deciding reference when codes differ by region or product family.

Bosch Support — washer E27 / F27

Frequently asked questions

What does Bosch washer E27 / F27 mean?

Bosch identifies E27 / F27 as a faulty pressure-sensor condition on supported washing machines.

Can I fix Bosch E27 / F27 by cleaning the drain filter?

Bosch does not describe E27 / F27 as a drain-filter code. It points to pressure sensing and is directed to service if present.

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Keep diagnosing

The E23 / F23 display on many Bosch washing machines indicates that AquaStop or leak protection is active. Codes can vary by model, so match the full model number to the official manual before ordering parts.

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