- Appliances
- Washing machines
F25
Siemens washer F25: turbidity sensor fault
Evidence linked to this decision
View source: Siemens washing-machine error codes and messagesRisk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
High
Quick answer
F25 means the turbidity-sensor signal cannot be used as a valid water-condition reading. Use only the external checks below and stop if the code returns.
Safety first
Stop and check this first
- F25 is not a user-replaceable diagnosis. Keep the washer disconnected if it also leaks, overheats, trips protection or smells electrical.
Safe checks you can perform
- End the cycle and isolate power
- Record the exact code and programme phase
- Check only detergent use and visible water
Leave these tasks to a qualified professional
- Do not attempt this professional task: Diagnose the turbidity measurement path
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Diagnose the turbidity measurement path
What they doA technician should check the optical chamber, sensor signal, harness and control using the exact appliance data.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
End the cycle and isolate power
Switch off and unplug from a dry socket; do not open the base or sensor housing.
F25 is not a user-replaceable diagnosis. Keep the washer disconnected if it also leaks, overheats, trips protection or smells electrical.
Evidence: Siemens washing-machine error codes and messages
Record the exact code and programme phase
Photograph F25 and note whether it appeared while filling, washing, rinsing or draining.
F25 is not a user-replaceable diagnosis. Keep the washer disconnected if it also leaks, overheats, trips protection or smells electrical.
Evidence: Siemens washing-machine error codes and messages
Check only detergent use and visible water
Record oversudsing or unusually dirty water; do not add cleaner or run service modes to test the sensor.
F25 is not a user-replaceable diagnosis. Keep the washer disconnected if it also leaks, overheats, trips protection or smells electrical.
Evidence: Siemens washing-machine error codes and messages
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Virtual technician
Does F25 still appear after these checks?
This guided flow uses the exact code and your answers to choose a test, an expected result and the next branch.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Appliances
- Brand
- Siemens
- Product type
- Washing machines
Known code variants
- anomalía F25 Miele
- anomalie F25 Miele
- code erreur F25 lave-linge Siemens
- code erreur F25 lave-vaisselle Miele
- codice E25 Siemens
- código E25 Siemens
- E00-25
- ecoTEC F.25
- erreur E25 Siemens
- error F25 lavadora Siemens
- error F25 lavavajillas Miele
- Error F25 Vaillant
- errore F25 lavastoviglie Miele
- errore F25 lavatrice Siemens
- F.25
- F25 Siemens
- Fehlercode F25 Miele
- guasto F25 Miele
- Miele dishwasher F25
- Miele F25
- Miele fault F25
- Miele Geschirrspüler Fehler F25
- Siemens E25
- Siemens F25
- Siemens Fehlercode E25
- Siemens Waschmaschine Fehler F25
- Siemens washer F25
- Siemens washing machine E25
- Vaillant F.25
What it means
Official Siemens support associates F25, E25 and E00-25 on compatible washing machines with this condition: the turbidity-sensor signal cannot be used as a valid water-condition reading. This page is washer-specific; the same display on a dishwasher, dryer or another product can mean something else, and the exact E-Nr manual prevails.
Warnings and stop conditions
- Mediumsource verified
F25 is not a user-replaceable diagnosis. Keep the washer disconnected if it also leaks, overheats, trips protection or smells electrical.
Evidence: Siemens washing-machine error codes and messages
Symptoms and causes
Probable causes · in order
- The optical water-condition signal is invalidConfirmed
Residue, an optical-path problem or an out-of-range sensor response can prevent a reliable reading.
Evidence: Siemens washing-machine error codes and messages
- The sensor circuit, harness or control is faultyPossible
The code covers the complete measurement path and does not prove that one sensor alone must be replaced.
Evidence: Siemens washing-machine error codes and messages
Sources and technical references
- 1
Siemens washing-machine error codes and messages
BSH Home Appliances / Siemens · 2026 · official_doc
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