Miele washing machines contain sophisticated electronic monitoring systems that continuously supervise water intake, drainage, temperature, motor operation, drum movement, door locking, detergent dispensing, leakage protection and numerous other functions.

When the control electronics detect an abnormal operating condition, the washing machine may stop the programme and display an F-series fault code, warning symbol or plain-text message.

Examples include:

• F10 – Water inlet
• F11 – Water drainage
• F34 – Door locking problem
• F35 – Door lock jammed
• F138 – Water protection system activated
• Water inlet fault
• Drainage fault
• Waterproof system activated
• Technical fault
• Excess detergent
• Check detergent

Miele's own current washing-machine documentation confirms, for example, that F10 can indicate insufficient water intake, F11 can indicate a drainage problem, F34 concerns failure of the door lock to engage, F35 concerns a jammed door lock, and F138 means the water protection system has reacted.

However, there is an important point technicians and owners should understand:

Miele fault-code definitions can differ between model generations, markets and appliance types.

An F-code found on another Miele appliance should therefore never automatically be assumed to have the same meaning on a washing machine. Always use the operating/service documentation corresponding to the exact washing-machine model.

Miele provides model-specific operating manuals that can be searched using the full model name or serial number.

Quick Miele Washing Machine Fault-Code Reference

Code	General Fault Area	Recommended First Check
F10	Water inlet	Tap, inlet hose, pressure, inlet filter
F11	Drainage	Filter, drain pump, drain hose
F15	Water intake / hot-water configuration on applicable models	Water supply and model configuration
F16	Excessive foam / detergent-related condition on applicable models	Detergent quantity and type
F20	Heating / temperature-control area on applicable models	Heater circuit; service diagnosis
F29	Heating/temperature system on applicable models	Professional diagnosis recommended
F34	Door cannot lock	Close door, inspect obstruction
F35	Door lock jammed	Power-cycle; service if persistent
F39	Electronics/control fault family	Power-cycle; service diagnosis
F41	Electronic/control fault family	Service diagnosis
F43	Electronic/control/programming fault family	Service diagnosis
F47	Communication/electronics fault family	Service diagnosis
F49	Electronics/sensor communication area	Service diagnosis
F50	Drive/electronic control area	Motor/drive diagnosis
F51	Pressure/water-level monitoring area	Pressure system diagnosis
F53	Motor speed/drive monitoring area	Motor/tacho/drive diagnosis
F56	Spin-speed monitoring problem	Load, motor and drive system
F62	Programme/control-input fault family	Controls/electronics diagnosis
F63	Water-path/control-system fault family	Model-specific diagnosis
F64	Sensor/control fault family	Model-specific diagnosis
F65	Drum/lighting or electronics depending on model	Model-specific diagnosis
F66	Recirculation/water-path fault family on applicable models	Water path/pump diagnosis
F92	Hygiene-related warning/fault on applicable models	Hot maintenance wash
F138	Water protection system activated	Turn off water; investigate leakage
F220	Water/leak detection fault family on applicable machines	Leak/water-protection diagnosis

Important: This table is a diagnostic orientation guide rather than a substitute for the model-specific Miele service manual. Codes in the F39–F66 range in particular can be highly model-dependent.

Miele F10 – Water Inlet Fault

Meaning

On current Miele washing-machine documentation, F10 indicates that the washing machine could not draw in enough water.

Possible causes

• Water tap closed
• Tap only partially open
• Inlet hose kinked
• Inlet hose trapped behind the machine
• Low mains water pressure
• Blocked inlet filter
• Faulty inlet valve
• Water-control system problem
• Electrical connection problem
• Control electronics fault

Solution

1. Turn the washing machine off.
2. Verify that the water tap is completely open.
3. Inspect the inlet hose for kinks.
4. Make sure the hose has not been crushed behind the appliance.
5. Check whether other taps have normal water pressure.
6. Inspect the inlet filter where permitted by the operating instructions.
7. Restart the programme.

Miele specifically recommends checking whether the tap is open, whether the inlet hose is kinked and whether sufficient water pressure is available.

If F10 continues despite normal water supply, professional diagnosis of the inlet valve, wiring and control system may be required.

Miele F11 – Drainage Fault

Meaning

F11 indicates that the washing machine cannot drain the water correctly.

Miele documentation lists a blocked drain pump or excessive drain-hose height among possible causes.

Common causes

• Blocked drain filter
• Coins or foreign objects in pump
• Blocked drain pump
• Kinked drain hose
• Blocked household waste pipe
• Drain hose installed too high
• Pump impeller obstruction
• Defective drain pump
• Wiring/control problem

Solution

Turn the appliance off before investigating.

Check:

1. Drain filter
2. Pump chamber
3. Pump impeller
4. Drain hose
5. Waste connection
6. Drain-hose installation height

Miele documentation for applicable domestic models specifies a maximum delivery head of approximately 1 metre.

Be careful when opening the drain filter because a substantial quantity of hot water may escape.

Miele F15 – Water Supply / Hot-Water Configuration Fault

F15 is associated with water-intake configuration on applicable Miele machines and should be interpreted according to the exact model.

Check:

• Hot/cold water connections where applicable
• Water taps
• Supply hoses
• Inlet valves
• Machine configuration
• Water temperature
• Wiring

Machines designed only for a cold-water supply should not be diagnosed using procedures intended for commercial or hot-water-capable machines.

Miele F16 – Excessive Foam / Detergent Condition

On applicable machines, this fault family can be associated with excessive foaming.

Possible reasons include:

• Too much detergent
• Incorrect detergent
• Very soft water with excessive detergent dosage
• Incorrect automatic-dosing settings
• Residual detergent accumulation

Reduce detergent according to:

• Load size
• Water hardness
• Soil level
• Detergent manufacturer's instructions

Excessive foam can interfere with pumping and water-level detection.

Miele F20 – Heating / Temperature Fault

On applicable washing-machine generations, F20 belongs to the heating/temperature-control fault area.

Possible components requiring diagnosis include:

• Heating element
• Temperature sensor
• Heater relay
• Wiring
• Connectors
• Control electronics

Because the heater operates at mains voltage, internal testing should be performed by a qualified technician.

Miele F29 – Heating-System Fault

F29 is another model-dependent code that may relate to heating or temperature monitoring on applicable machines.

If it persists:

1. Power-cycle the appliance.
2. Try a normal programme.
3. If the programme repeatedly stops while heating, arrange professional diagnosis.

Avoid replacing a heater purely because an F29 code appears; sensor, relay, wiring and electronic faults can produce similar symptoms.

Miele F34 – Door Lock Cannot Engage

Miele identifies F34 as a condition where the door is not properly closed and the door lock cannot engage.

Solution

• Open the door.
• Check for trapped clothing.
• Inspect the door seal.
• Close the door firmly without slamming it.
• Restart the programme.

If F34 returns repeatedly, possible causes include:

• Door lock/interlock failure
• Door alignment problem
• Damaged latch
• Wiring problem
• Electronic-control fault

Miele F35 – Door Lock Jammed

Miele describes F35 as a jammed door lock. Its published first action is to switch the washing machine off and back on; persistent faults require service.

Do not force the door open.

A jammed lock may require examination of:

• Interlock
• Door hook
• Wiring
• Mechanical release system
• Control electronics

Miele F39, F41, F43, F47 and F49 – Electronic Fault Family

These codes generally belong to model-dependent electronic, communication, configuration or control-system fault groups.

Possible causes can include:

• Temporary electronic malfunction
• Interrupted communication
• Wiring/connector problem
• Control-board fault
• Peripheral component pulling down a communication circuit
• Power-supply instability

First response

Turn the machine off and disconnect it from power for several minutes.

Reconnect and test.

If the same code immediately returns, professional diagnostics are recommended rather than repeatedly resetting the appliance.

Miele F50 – Drive-System Fault

F50 belongs to the drive/electronic-control fault area on applicable washing machines.

Possible causes include:

• Motor-control electronics
• Motor problem
• Wiring
• Connector fault
• Drum mechanically restricted
• Drive-system electronics

Check whether the drum rotates freely by hand with the appliance switched off.

Persistent F50 faults normally require technician-level diagnostics.

Miele F51 – Water-Level / Pressure Monitoring Fault

This fault family can involve the pressure or water-level monitoring system.

Possible causes include:

• Pressure sensor
• Pressure chamber
• Pressure hose
• Blockage caused by detergent residue
• Wiring
• Electronics

Incorrect water-level information is safety-critical because the controller uses it to determine filling, heating and draining behaviour.

Miele F53 – Motor Speed Monitoring Fault

F53 commonly belongs to the motor-speed/drive monitoring system on applicable Miele washing machines.

Potential areas include:

• Motor speed feedback
• Tachogenerator/tacho system
• Motor electronics
• Wiring
• Connectors
• Motor
• Control electronics

A technician may need to verify motor resistance, speed-feedback signals, wiring continuity and drive-electronics operation.

Miele F56 – Spin Speed Not Achieved

F56 can be associated with the machine failing to reach the expected spin speed.

Before assuming an electronic failure, check:

• Extremely unbalanced load
• Single heavy item
• Excessive foam
• Drainage problems
• Drum restriction

If F56 repeatedly occurs with normal balanced loads, the motor, speed-feedback system and drive electronics may require diagnosis.

Miele F62, F63, F64, F65 and F66

These belong to model-specific control, sensor, water-path or peripheral fault families.

Because their precise interpretation varies considerably between Miele product generations, use the complete model number before ordering components.

Technician diagnosis may involve:

• Service-mode fault memory
• Sensor readings
• Pump operation
• Water-path inspection
• Wiring continuity
• Control-board outputs
• Component activation tests

Miele F92 – Hygiene Warning / Hygiene-Related Condition

On applicable machines, F92 can indicate that repeated low-temperature washing has allowed conditions conducive to bacterial or detergent-residue accumulation.

Recommended action

Run a high-temperature maintenance programme according to the machine's operating instructions.

Also:

• Use the correct detergent quantity.
• Periodically use hotter programmes where textile care permits.
• Clean the detergent drawer.
• Clean the door seal.
• Allow the machine to dry after use.

This helps control biofilm, detergent residue and unpleasant odours.

Miele F138 – Water Protection System Activated

This is one of the most important Miele washing-machine faults.

Miele's current documentation states:

F138 means the water protection system has reacted.

Miele instructs users to:

• Turn off the water tap.
• Contact Miele Customer Service.

Possible causes

• Internal water leak
• Hose leak
• Pump leak
• Dispenser leak
• Excessive foaming causing water escape
• Damaged seal
• Water in the machine's base
• Water-protection sensor activation

Do not simply reset F138 repeatedly.

If there is water inside the machine base, restoring operation without identifying the leak can cause further damage.

Miele F220 – Water / Leak Detection Fault

F220 appears on applicable Miele generations in connection with water/leak-detection fault monitoring.

Possible inspection areas can include:

• Internal leakage
• Water collecting in the base
• Leak detection
• Hoses
• Pump
• Door seal
• Dispenser system
• Water-protection components

Because implementation differs between models, use the exact appliance documentation for F220 diagnosis.

If visible water is present:

1. Stop the programme.
2. Switch the appliance off.
3. Disconnect power if safe.
4. Close the water tap.
5. Do not continue operating the appliance until the source has been identified.

Miele Display Message: “Water Inlet Fault”

This message means water is entering too slowly or not entering at all.

Check:

• Water tap fully open
• Inlet hose
• Inlet filter
• Water pressure
• Inlet valve

Miele's troubleshooting documentation similarly advises checking the stopcock, inlet hose and water pressure for an intake fault.

Miele Display Message: “Drainage Fault”

The washing machine cannot discharge water within the expected time.

Miele identifies a blocked/restricted drain and an excessively high drain hose as possible causes.

Check

• Drain filter
• Drain pump
• Pump impeller
• Drain hose
• Household drain
• Installation height

If the drum remains full of hot water, use caution before removing the filter.

Miele Display Message: “Waterproof System Activated”

This message should be treated seriously.

Miele states that it means the water protection system has reacted and advises closing the water supply and contacting service.

Possible causes include leakage or water entering an area monitored by the protection system.

Do not repeatedly restart the washing machine without finding the cause.

Miele Display Message: “Technical Fault”

A generic technical fault can result from an electronic or electromechanical problem.

For applicable machines, Miele recommends disconnecting the washing machine from electricity, waiting at least two minutes, reconnecting it and trying the programme again. If the fault returns, service is required.

This approach is appropriate for a temporary control malfunction but should not be used to conceal a recurring fault.

Miele Display Message: “Excess Detergent”

This warning normally indicates excessive foam.

Common reasons include:

• Too much detergent
• Detergent unsuitable for automatic washing machines
• Soft water
• Small load with full detergent dose
• Incorrect TwinDos dosage
• Excessive liquid detergent

Solution

Reduce detergent at subsequent washes.

If TwinDos is installed:

• Check dosage settings.
• Confirm the correct detergent.
• Check water-hardness configuration.
• Follow the cleaning/maintenance procedure specified for the system.

Persistent oversudsing can interfere with rinsing, draining and water-level detection.

Miele Display Message: “Check Detergent”

This generally indicates that detergent dosage or foaming requires attention.

Check:

• Correct detergent
• Correct quantity
• Water hardness
• Load size
• Soil level
• TwinDos settings where fitted

More detergent does not necessarily mean cleaner clothes.

Too much detergent can cause:

• Excessive foam
• Poor rinsing
• Detergent residue
• Drainage problems
• Unpleasant machine deposits

How to Safely Reset a Miele Washing Machine Fault

A simple power reset can clear temporary electronic faults.

General procedure

1. Cancel the programme if possible.
2. Switch the washing machine off.
3. Disconnect it from mains power.
4. Wait several minutes.
5. Reconnect power.
6. Turn the appliance on.
7. Start an appropriate programme.

For some technical faults, Miele documentation specifically recommends disconnecting power and waiting at least two minutes before reconnecting.

However, resetting is not a repair.

Do not repeatedly reset faults involving:

• Water leakage
• F138
• Waterproof-system activation
• Burning smell
• Electrical arcing
• Repeated circuit-breaker trips
• Motor overheating
• Smoke
• Visible wiring damage

How to Clean a Miele Drain Filter and Pump

A blocked filter is one of the first things to investigate when an F11 or drainage warning occurs.

General precautions

Switch off and unplug the machine.

If the machine contains water:

• Place towels around the filter area.
• Use a shallow container.
• Release water slowly.
• Be careful if the previous programme used hot water.

Once drained:

1. Remove the filter.
2. Remove lint, coins, buttons and debris.
3. Inspect the pump chamber.
4. Verify that the pump impeller is not obstructed.
5. Reinstall the filter correctly.
6. Check for leakage after restarting.

Follow the exact procedure in the operating instructions because filter arrangements vary.

Checking the Water Inlet System

For F10 or a Water Inlet Fault:

Step 1 – Check the tap

Ensure it is completely open.

Step 2 – Check the hose

Look for:

• Kinks
• Crushing
• Damage

Step 3 – Check pressure

Poor building water pressure can prevent the machine filling within its programmed time.

Step 4 – Check the inlet filter

Sediment can restrict water flow.

Step 5 – Technician diagnosis

If external checks are normal, investigate:

• Solenoid inlet valve
• Valve wiring
• Pressure sensing
• Control electronics

Understanding Miele's Waterproof Protection

Many Miele washing machines incorporate sophisticated water-protection features.

Depending on model, the system can monitor conditions such as:

• Water inlet
• Internal leakage
• Water level
• Valve operation
• Base water detection

If the protection system activates, the appliance may stop filling and display F138 or Waterproof system activated.

This should not be treated as a nuisance warning.

Its purpose is to reduce the risk of continued water leakage.

Fault Diagnosis by Symptom

Machine does not fill

Likely areas:

• F10
• Water inlet fault
• Tap
• Inlet hose
• Filter
• Inlet valve
• Low pressure

Machine remains full of water

Likely areas:

• F11
• Drainage fault
• Drain filter
• Pump
• Drain hose

Door will not lock

Likely areas:

• F34
• F35
• Door interlock
• Latch
• Door alignment

Machine will not spin correctly

Possible areas:

• F53
• F56
• Unbalanced load
• Drainage
• Motor
• Drive electronics

Water underneath machine

Potentially serious.

Possible areas:

• F138
• F220 on applicable models
• Waterproof warning
• Hose
• Pump
• Seal
• Dispenser
• Internal plumbing

Turn off the water supply if leakage is suspected.

Technician-Level Diagnostic Approach

Professional diagnosis should follow a logical sequence rather than replacing parts based only on the displayed F-code.

1. Record the exact fault

Record:

• Full model number
• Serial number
• F-code
• Display message
• Programme being used
• Stage where programme stopped
• Whether water remains inside

2. Reproduce the symptom

Determine whether the fault occurs during:

• Filling
• Heating
• Washing
• Draining
• Rinsing
• Spinning
• Door locking

3. Perform visual inspection

Look for:

• Water leakage
• Loose connectors
• Damaged hoses
• Burn marks
• Corrosion
• Foreign objects
• Excessive detergent residue

4. Test the relevant subsystem

For example:

F10 → inlet system

F11 → drainage system

F34/F35 → door-lock system

F53/F56 → drive system

F138 → leakage/water protection

5. Consult model-specific technical documentation

This is particularly important for codes whose interpretation changes between models.

Miele provides searchable operating documentation, and Miele Professional also maintains a digital operating-instructions database.

When Should You Call Miele Service?

Professional service is recommended when:

• F138 appears.
• Waterproof System Activated appears.
• Water is leaking.
• The circuit breaker trips.
• There is a burning smell.
• The motor does not operate.
• F-codes immediately return after a reset.
• Internal electrical testing is required.
• The control electronics are suspected.
• Door-lock replacement is required.
• The machine must be dismantled.

Miele maintains service and technical-support resources for its appliances.

Important Safety Precautions

Before cleaning filters or performing accessible maintenance:

• Switch off the washing machine.
• Disconnect mains electricity when appropriate.
• Close the water tap when investigating leaks.
• Never work on energized internal components.
• Never bypass the door interlock.
• Never bypass leakage protection.
• Do not defeat the Waterproof System.
• Do not operate a machine with visible electrical damage.

Electrical measurements, insulation tests, heater testing, control-board diagnosis and internal component replacement should be performed by appropriately qualified personnel.

Frequently Asked Questions (FAQ)

1. What does F10 mean on a Miele washing machine?

F10 generally means that the washing machine has not been able to take in sufficient water. Check the tap, inlet hose and water pressure.

2. What does F11 mean?

F11 indicates a drainage problem. Check the drain filter, pump and drain hose.

3. How do I fix a Miele Drainage Fault?

Clean the drain filter and pump, inspect the drain hose for restrictions and ensure it has not been installed too high.

4. What does Miele F34 mean?

The door has not closed/locked correctly and the lock could not engage.

5. What does F35 mean?

The door lock is jammed. Miele recommends switching the machine off and on again; if the fault returns, service is required.

6. What does Miele F138 mean?

F138 means the water protection system has reacted. Turn off the water supply and arrange service.

7. Can I continue using a Miele washer after F138?

It is not recommended. A water-protection fault can indicate leakage, so the cause should be identified first.

8. Why does my Miele washing machine say Water Inlet Fault?

Water may be entering too slowly because of a closed tap, kinked hose, restricted filter, insufficient pressure or an inlet-system problem.

9. Why does my Miele say Drainage Fault?

The drain path may be restricted by a blocked filter, pump, hose or household drain.

10. What does Waterproof System Activated mean?

The washing machine's water-protection system has detected a condition requiring the appliance to stop. Miele recommends closing the water supply and contacting service.

11. Can I reset Miele error codes by unplugging the washer?

Some temporary electronic faults may clear after a power cycle, but persistent codes require diagnosis. Leakage and water-protection faults should not simply be reset and ignored.

12. Why does my Miele say Excess Detergent?

The washing machine has detected excessive foaming or a condition consistent with too much detergent. Reduce the dosage and verify detergent and TwinDos settings where applicable.

13. Why does my washing machine keep producing excessive foam?

Common reasons are overdosing detergent, very soft water, using an unsuitable detergent or incorrect automatic-dosing settings.

14. Can excessive detergent damage a washing machine?

Repeated overdosing can cause heavy foam, poor rinsing, deposits and operational problems and can contribute to drainage or sensing difficulties.

15. What should I check if my Miele will not spin?

Check whether water has drained, redistribute an unbalanced load and inspect for excessive foam. Persistent F53/F56-type drive faults require professional diagnosis.

16. Should I force open a Miele door showing F35?

No. Forcing the door can damage the lock, latch or door assembly.

17. Can a blocked filter produce F11?

Yes. A blocked drain filter or pump is a common reason for drainage failure.

18. Why does my Miele washing machine smell?

Repeated low-temperature washing, detergent residue and moisture can promote deposits and odours. Periodic maintenance/hygiene washing and cleaning of the drawer and seal can help.

19. Are all Miele F-codes identical across every washing machine?

No. Fault definitions and diagnostic procedures can vary between models and generations.

20. Where can I find the correct fault information for my exact Miele model?

Use the complete model number or serial number to locate the appropriate Miele operating instructions. Miele's manual search supports searching by full model name and serial number.

21. Should I replace a component based only on an F-code?

No. A code identifies a fault area or detected condition; it does not always prove that one specific component has failed.

22. Is F138 a drain-pump fault?

Not primarily. F138 indicates activation of the water-protection system.

23. Can low water pressure cause an inlet error?

Yes. Miele specifically identifies insufficient water pressure as a possible cause of water-intake faults.

24. What should I do before calling a technician?

Record the exact model, F-code, display message and programme stage, and note whether water remains inside or leakage is visible.

25. What information should I give Miele Service?

Provide:

• Exact model number
• Serial number
• Fault code
• Display message
• Description of symptoms
• When the fault occurs
• Whether the machine fills/drains
• Whether any leakage is visible

Final Troubleshooting Summary

Miele washing-machine error codes are designed to identify abnormal conditions before they cause further operational problems.

The most useful first-level distinctions are:

F10 / Water Inlet Fault → investigate incoming water.

F11 / Drainage Fault → investigate the filter, pump and drain hose.

F34/F35 → investigate door closure and locking.

F53/F56 → investigate drive/spin operation after ruling out load and drainage issues.

F138 / Waterproof System Activated → stop operation, close the water supply and investigate possible leakage.

Excess Detergent / Check Detergent → correct detergent dosage and automatic-dosing settings.

Technical Fault → perform the manufacturer-approved power-cycle procedure and arrange service if the fault returns.

The key rule is to diagnose the system rather than blindly replace the component associated with an internet fault-code list. Miele uses many product generations and control platforms, so always confirm the precise code definition against the documentation for the exact washing-machine model before carrying out an internal repair.

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