Miele Coffee Makers Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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F1
Machine will not start; display shows F1 shortly after power-on
Main Control Electronics Fault
F10
Machine displays F10; the water tank appears full but the machine reports no water.
Water Tank Presence / Level Sensor Fault
F11
Display shows F11; the machine reports a drainage or wastewater fault (on plumbed-in models).
Drain Pump / Wastewater Fault
F12
Machine displays F12; no water intake from the plumbed-in supply.
Inlet Valve / Water Supply Fault
F13
Display shows F13; the machine reports a heating or temperature rise fault.
Heating Time-Out / Insufficient Temperature Rise
F14
Machine displays F14; communication error between modules.
Communication Bus Fault (Display to Main Board)
F15
Display shows F15; internal memory or configuration error.
EEPROM / Configuration Data Fault
F16
Machine shows F16; brew unit not recognized or not in the correct position.
Brew Unit Position / Recognition Fault
F17
Display shows F17; milk system fault, milk not being drawn or frothed.
Milk Pump / Milk Flow Fault
F18
Machine displays F18; internal pressure or pump overrun fault.
Overpressure / Pump Run Time Fault
F19
Display shows F19; hot water or steam temperature fault.
Hot Water / Steam Temperature Control Fault
F2
Machine displays F2 and will not heat or brew
Thermal Sensor / NTC Fault on Heater Block
F20
Machine shows F20; internal fan or ventilation fault.
Cooling Fan Fault
F3
Display shows F3; machine may overheat or not reach correct temperature
Overheat Protection / Safety Thermostat Trip
F4
Machine displays F4 and stops brewing; it may abort shortly after starting.
Flow Meter / Water Flow Sensor Fault
F5
Display shows F5; machine does not pump water or stops mid-cycle.
Water Pump Fault
F6
Machine displays F6; water may leak internally or the machine refuses to brew.
Leakage / Water in Base Tray Fault
F7
Display shows F7; the brew unit will not move or the machine jams during start-up.
Brew Unit Drive Motor Fault
F8
Machine displays F8; steam or hot water functions may not work correctly.
Steam Boiler / Steam Temperature Sensor Fault
F9
Display shows F9; the grinder does not run or stops unexpectedly.
Coffee Grinder Motor Fault
Symptom
Coffee is lukewarm or not hot enough.
Low Brew Temperature
Symptom
Coffee is too strong or bitter even at normal settings.
Over-Extraction / Brew Temperature or Grind Too High
Symptom
Coffee tastes weak or watery despite normal volume.
Incorrect Grind or Dosing / Brew Pressure Too Low
Symptom
Display is very dim or the backlight flickers.
Display Backlight / Power Issue
Symptom
Display repeatedly shows 'Fill water tank' even when the tank is full.
Water Tank Detection Issue (No Error Code)
Symptom
Display shows 'Clean the brew unit' frequently, or the machine requests cleaning after only a few cycles.
Brew Unit Contamination / Sensor Sensitivity
Symptom
Display shows 'Descale the appliance' soon after descaling has been performed.
Descaling Counter / Scale Sensor Issue
Symptom
Display shows 'Empty waste container' even when the container is empty and reinserted.
Waste Container Presence / Counter Fault
Symptom
Display shows 'Insert brew unit' even though the brew unit is installed.
Brew Unit Presence Detection Fault
Symptom
Display shows 'System lock' or the child lock symbol; the machine will not brew.
Child Lock / System Lock Activated
Symptom
Machine frequently displays 'Refill beans' even when hopper is full
Bean Level Detection / Grinder Load Sensing Issue
Symptom
Machine leaks water under the unit during or after brewing.
External Leak from Hydraulic Circuit
Symptom
Machine makes loud knocking or grinding noises during brewing.
Mechanical Drive or Grinder Noise
Symptom
Machine turns on, but buttons or touch display do not respond.
User Interface / Touch Control Failure
Symptom
Machine vibrates excessively or moves on the counter during operation.
Excessive Vibration / Pump or Grinder Imbalance
Symptom
Machine will not power on; display remains dark.
No Power / Power Supply Failure
Symptom
Milk froth is too airy or too liquid.
Incorrect Milk Frothing Performance
Symptom
Milk is not being drawn from the container during cappuccino/latte preparation.
Milk Suction Failure
Symptom
Moldy or stale smell from the machine or the coffee.
Hygiene / Residue Build-Up
Symptom
No coffee dispensed; coffee grounds end up in the waste container.
Brew Unit Outlet Blockage / Misalignment
Symptom
Steam wand or milk frother produces little or no steam.
Steam Output Restriction
Symptom
Strong burnt smell during brewing or from inside the machine.
Overheating or Electrical Burning
Symptom
The grinder runs but no beans are ground (beans remain in the hopper).
Grinder Feed / Hopper Blockage
Symptom
Water collects inside the drip tray very quickly, even when not brewing.
Internal Bypass Leak / Drain Valve Leak
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| F1 |
Machine will not start; display shows F1 shortly after power-on
|
Main Control Electronics Fault | View Details |
| F10 |
Machine displays F10; the water tank appears full but the machine reports no water.
|
Water Tank Presence / Level Sensor Fault | View Details |
| F11 |
Display shows F11; the machine reports a drainage or wastewater fault (on plumbed-in models).
|
Drain Pump / Wastewater Fault | View Details |
| F12 |
Machine displays F12; no water intake from the plumbed-in supply.
|
Inlet Valve / Water Supply Fault | View Details |
| F13 |
Display shows F13; the machine reports a heating or temperature rise fault.
|
Heating Time-Out / Insufficient Temperature Rise | View Details |
| F14 |
Machine displays F14; communication error between modules.
|
Communication Bus Fault (Display to Main Board) | View Details |
| F15 |
Display shows F15; internal memory or configuration error.
|
EEPROM / Configuration Data Fault | View Details |
| F16 |
Machine shows F16; brew unit not recognized or not in the correct position.
|
Brew Unit Position / Recognition Fault | View Details |
| F17 |
Display shows F17; milk system fault, milk not being drawn or frothed.
|
Milk Pump / Milk Flow Fault | View Details |
| F18 |
Machine displays F18; internal pressure or pump overrun fault.
|
Overpressure / Pump Run Time Fault | View Details |
| F19 |
Display shows F19; hot water or steam temperature fault.
|
Hot Water / Steam Temperature Control Fault | View Details |
| F2 |
Machine displays F2 and will not heat or brew
|
Thermal Sensor / NTC Fault on Heater Block | View Details |
| F20 |
Machine shows F20; internal fan or ventilation fault.
|
Cooling Fan Fault | View Details |
| F3 |
Display shows F3; machine may overheat or not reach correct temperature
|
Overheat Protection / Safety Thermostat Trip | View Details |
| F4 |
Machine displays F4 and stops brewing; it may abort shortly after starting.
|
Flow Meter / Water Flow Sensor Fault | View Details |
| F5 |
Display shows F5; machine does not pump water or stops mid-cycle.
|
Water Pump Fault | View Details |
| F6 |
Machine displays F6; water may leak internally or the machine refuses to brew.
|
Leakage / Water in Base Tray Fault | View Details |
| F7 |
Display shows F7; the brew unit will not move or the machine jams during start-up.
|
Brew Unit Drive Motor Fault | View Details |
| F8 |
Machine displays F8; steam or hot water functions may not work correctly.
|
Steam Boiler / Steam Temperature Sensor Fault | View Details |
| F9 |
Display shows F9; the grinder does not run or stops unexpectedly.
|
Coffee Grinder Motor Fault | View Details |
| – |
Coffee is lukewarm or not hot enough.
|
Low Brew Temperature | View Details |
| – |
Coffee is too strong or bitter even at normal settings.
|
Over-Extraction / Brew Temperature or Grind Too High | View Details |
| – |
Coffee tastes weak or watery despite normal volume.
|
Incorrect Grind or Dosing / Brew Pressure Too Low | View Details |
| – |
Display is very dim or the backlight flickers.
|
Display Backlight / Power Issue | View Details |
| – |
Display repeatedly shows 'Fill water tank' even when the tank is full.
|
Water Tank Detection Issue (No Error Code) | View Details |
| – |
Display shows 'Clean the brew unit' frequently, or the machine requests cleaning after only a few cycles.
|
Brew Unit Contamination / Sensor Sensitivity | View Details |
| – |
Display shows 'Descale the appliance' soon after descaling has been performed.
|
Descaling Counter / Scale Sensor Issue | View Details |
| – |
Display shows 'Empty waste container' even when the container is empty and reinserted.
|
Waste Container Presence / Counter Fault | View Details |
| – |
Display shows 'Insert brew unit' even though the brew unit is installed.
|
Brew Unit Presence Detection Fault | View Details |
| – |
Display shows 'System lock' or the child lock symbol; the machine will not brew.
|
Child Lock / System Lock Activated | View Details |
| – |
Machine frequently displays 'Refill beans' even when hopper is full
|
Bean Level Detection / Grinder Load Sensing Issue | View Details |
| – |
Machine leaks water under the unit during or after brewing.
|
External Leak from Hydraulic Circuit | View Details |
| – |
Machine makes loud knocking or grinding noises during brewing.
|
Mechanical Drive or Grinder Noise | View Details |
| – |
Machine turns on, but buttons or touch display do not respond.
|
User Interface / Touch Control Failure | View Details |
| – |
Machine vibrates excessively or moves on the counter during operation.
|
Excessive Vibration / Pump or Grinder Imbalance | View Details |
| – |
Machine will not power on; display remains dark.
|
No Power / Power Supply Failure | View Details |
| – |
Milk froth is too airy or too liquid.
|
Incorrect Milk Frothing Performance | View Details |
| – |
Milk is not being drawn from the container during cappuccino/latte preparation.
|
Milk Suction Failure | View Details |
| – |
Moldy or stale smell from the machine or the coffee.
|
Hygiene / Residue Build-Up | View Details |
| – |
No coffee dispensed; coffee grounds end up in the waste container.
|
Brew Unit Outlet Blockage / Misalignment | View Details |
| – |
Steam wand or milk frother produces little or no steam.
|
Steam Output Restriction | View Details |
| – |
Strong burnt smell during brewing or from inside the machine.
|
Overheating or Electrical Burning | View Details |
| – |
The grinder runs but no beans are ground (beans remain in the hopper).
|
Grinder Feed / Hopper Blockage | View Details |
| – |
Water collects inside the drip tray very quickly, even when not brewing.
|
Internal Bypass Leak / Drain Valve Leak | View Details |
No matching codes found
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