Bosch · Washing Machine
Bosch Washing Machine E25 Error Code
Turbidity sensor fault during wash
What this error means
E25 (F25) flags the turbidity sensor that measures wash water clarity for automatic program adjustment. On models with ActiveWater or i-DOS, a failed turbidity reading stops the cycle because the board cannot judge soil level.
How E25 is detected
Bosch washing machine models lock the door or lid before energizing fill, heat, or high-speed spin. E25 means the latch switch never sent a "locked" signal to the main control, or the lock motor did not complete its travel. On Bosch WGG254AXUC, Bosch WGB246AXUC, and similar variants, clothing caught in the gasket, a misaligned strike, or a failed latch assembly are the most common mechanical causes—not the board itself.
Inspect the door gasket perimeter and strike alignment before replacing the latch. Detergent residue coating the optical turbidity cell is reported frequently on this code. After correcting mechanical issues, run an empty 194°f maintenance wash with descaler to flush the sump circuit. If the latch clicks but E25 persists, the door lock switch or wiring harness to the control board likely needs testing with a multimeter.
Do not force the door open during an active cycle; wait for the lock to release when the board de-energizes the lock motor—usually two to three minutes after canceling power on most Bosch units.
Common causes
- Detergent residue coating the optical turbidity cell
- Air bubble trapped in the turbidity chamber after drain
- Failed turbidity sensor after hard-water mineral buildup
- Wiring harness corrosion at the sump sensor plug
Step-by-step fixes
- 1Run an empty 194°F maintenance wash with descaler to flush the sump circuit
- 2Cancel and drain, then restart on a standard cotton program without i-DOS overdosing
- 3Avoid excess powder detergent that leaves cloudy suspension in the sump
- 4Power-cycle and retry once before assuming hardware failure
When to call a technician
E25 on every program after descaling points to turbidity sensor or sump harness replacement inside the tub assembly.
Affected models
- Bosch WGG254AXUC
- Bosch WGB246AXUC
- Bosch WAW285H1UC
Prevention & maintenance
- Wipe the door gasket weekly and avoid overloading items against the seal—E25 often starts as a slow leak or latch misalignment.
- Record when E25 appears in the cycle and whether it clears after a 60-second power reset on your Bosch washing machine—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for E25; Bosch uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting E25; reversed plugs on pumps and valves cause immediate repeat faults.