- Appliances
- Washing machines
F18
Siemens washer F18: drain path blocked
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
Medium
Quick answer
F18 means the filter or drain hose is blocked, trapped or kinked. Use only the external checks below and stop if the code returns.
Safety first
Stop and check this first
- Do not open the filter while water is hot or the drum is moving. If water reaches electricity, isolate power without stepping into it and stop.
Safe checks you can perform
- Let hot wash water cool
- Drain and clean the filter exactly as documented
- Inspect the external outlet route
Leave these tasks to a qualified professional
- Do not attempt this professional task: Test pump, outlet and level confirmation
What a technician must be able to justify
A technician is coming
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.
Test pump, outlet and level confirmation
What they doA technician should verify impeller freedom, pump output, hose routing, pressure feedback and control.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Checks and evidence, step by step
Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
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Let hot wash water cool
No special tools
Procedure
Switch off, unplug from a dry socket and wait before emergency draining because retained water can scald.
Do not open the filter while water is hot or the drum is moving. If water reaches electricity, isolate power without stepping into it and stop.
Evidence: Siemens washing-machine error codes and messages
- 2
Drain and clean the filter exactly as documented
No special tools
Procedure
Use the model's emergency hose or filter procedure, a shallow container and absorbent cloths; never tip the machine.
Do not open the filter while water is hot or the drum is moving. If water reaches electricity, isolate power without stepping into it and stop.
Evidence: Siemens washing-machine error codes and messages
- 3
Inspect the external outlet route
No special tools
Procedure
Check the visible hose and household connection for kinks or blockage, then run one documented drain check.
Do not open the filter while water is hot or the drum is moving. If water reaches electricity, isolate power without stepping into it and stop.
Evidence: Siemens washing-machine error codes and messages
Virtual technician
Does F18 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 F18 Miele
- anomalie F18 Miele
- Bosch F18 lavadora
- Bosch F18 washer
- Bosch lavadora no desagua F18
- Bosch washer F18 error
- Bosch washer not draining F18
- code erreur F18 lave-linge Siemens
- code erreur F18 lave-vaisselle Miele
- codice E18 Siemens
- código E18 Siemens
- E00-18
- erreur E18 Siemens
- error F18 lavadora Bosch
- error F18 lavadora Siemens
- error F18 lavavajillas Miele
- errore F18 lavastoviglie Miele
- errore F18 lavatrice Siemens
- F18 Siemens
- Fehlercode F18 Miele
- guasto F18 Miele
- Miele dishwasher F18
- Miele F18
- Miele fault F18
- Miele Geschirrspüler Fehler F18
- Siemens E18
- Siemens F18
- Siemens Fehlercode E18
- Siemens Waschmaschine Fehler F18
- Siemens washer F18
- Siemens washing machine E18
What it means
Official Siemens support associates F18, E18 and E00-18 on compatible washing machines with this condition: the filter or drain hose is blocked, trapped or kinked. 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
Do not open the filter while water is hot or the drum is moving. If water reaches electricity, isolate power without stepping into it and stop.
Evidence: Siemens washing-machine error codes and messages
Symptoms and causes
Probable causes · in order
- The user-serviceable drain path is obstructedConfirmed
Lint, a coin, a kinked outlet hose or a blocked household connection can prevent drainage.
Evidence: Siemens washing-machine error codes and messages
- The pump or level feedback is faultyPossible
A clear filter does not exclude an impeller, pump winding, pressure signal, harness or control fault.
Evidence: Siemens washing-machine error codes and messages
Sources and technical references
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Siemens washing-machine error codes and messages
BSH Home Appliances / Siemens · 2026 · official_doc
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