The short answer
E25 on this washing machine means there is a problem with the turbidity sensor — that is what the manufacturer published for it, and no more. The machine will generally still wash, using default rinsing rather than measured rinsing, so results are acceptable but less efficient. One of the checks below is an owner check, and the rest of the work is behind a panel.
Error codes
Reference| Code | Meaning |
|---|---|
| E25 | These error codes indicate there is an issue with the turbidity sensor. |
What the machine does alongside the code
- The code appears and the wash otherwise completes normally — A sensing fault that does not stop the cycle is what this code usually looks like.
- The fault moves when the appliance is knocked or something is set down hard on it — A vibration-sensitive fault is a connection fault, and that is half of what this code covers.
What triggers E25, most likely first
- Residue or scale clouding the sensor window — It goes first because it is the commonest and the cheapest: the sensor reads through a window in the water path, and detergent film or scale over that window makes its reading unusable.
- A failed the turbidity sensor — It sits here rather than first because the code does not distinguish it from its wiring, and the wiring is cheaper to eliminate.
- A control board that no longer drives or reads that circuit — Last, deliberately: it is the most expensive candidate and it cannot be diagnosed at all until the three cheaper ones are cleared.
Check in this order, and why
- Note whether the wash still completes normally — A completing cycle with a sensing code is a different situation from a cycle that stops.
- Check whether the fault is repeatable or intermittent — Repeatable points at the part; intermittent points at the connection, and the order of work follows.
- Power down for a minute, then use it the same way again — Clears any stored code and shows you whether the fault is live before anything is opened.
- Body: Pin the symptom to one function before opening anything — a single dead function and a general misbehaviour lead to completely different work.
The reset, then the owner-safe checks
- Check the outside of the appliance for what moved — A recent move, a service visit or a panel that has been off puts a loose connector at the top of the list.
About 10 min
- Run an empty maintenance wash at the highest temperature with a machine cleaner, then retest — Descaling and degreasing the circulation path is what clears a clouded sensor window.
About 90 min
- Copy the model details from the rating plate — This code covers a part and a harness that both differ across the family, so the plate decides the part.
About 5 min
- STOP HERE — the turbidity sensor and its wiring are behind a panel — Everything past this point is work next to live terminals, which is where an owner check ends.
Before anything is opened
Safety
Unplug the machine or switch off its breaker before any panel comes off — a capacitor can hold a charge after the power is off. Close the supply tap before touching a hose, expect standing water when a filter comes out, and never work round the door interlock.
When this is a service call rather than a reset
Call straight away if the appliance behaves unpredictably rather than simply missing one function, or if you can see or smell heat damage at a connector.
Neighbouring codes on Bosch washing machines
What this page does not cover
This reading applies to the Bosch washing machine line as a whole, not to one family or model. It does not cover what differs between model lines — wiring colours, connector positions, part numbers and service-mode sequences — which are in your own model manual and which a technician matches to the rating plate rather than to this code. Where a family- or model-specific page for this code exists, it is linked from the code index below and it is the more specific answer.
Links: - [Bosch washing machine error codes](/blog/bosch-washer-error-codes)
Where to go next
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
