Miele Robot Vacuums Error Codes

F1

Robot vacuum will not start a cleaning cycle; display or app shows F1 shortly after pressing Start.

Main Power Supply / Battery Protection Fault

F10

Robot vacuum shows F10 and stops; suction motor may not start or may shut off quickly.

Suction Motor / Fan Motor Fault

F11

Robot vacuum displays F11 and stops; may occur when the main brush engages or when moving onto carpets.

Main Brush Motor Overload / Blockage

F12

Robot vacuum shows F12 and may stop with the wheels spinning or stuck against an obstacle.

Overcurrent / Stall Protection on Drive System

F13

Robot vacuum displays F13 and may not connect to the app or Wi‑Fi network.

Wi‑Fi / Communication Module Fault

F14

Robot vacuum shows F14 and stops; may occur when mapping or using camera-based navigation.

Camera / Top Sensor Fault (for models with camera navigation)

F15

Robot vacuum displays F15 and may not detect walls or obstacles correctly, bumping repeatedly.

Front IR Obstacle Sensor Fault

F16

Robot vacuum shows F16 and may not dock correctly or may overshoot the charging station.

Docking Sensor / IR Receiver Fault

F17

Robot vacuum displays F17 and may shut down unexpectedly during cleaning, even with sufficient battery indicated.

Battery Temperature / Sensor Fault

F18

Robot vacuum shows F18 and may not respond to buttons or remote commands reliably.

Keypad / User Interface Fault

F19

Robot vacuum displays F19 and may not update firmware or communicate with the app correctly.

Internal Communication Bus Fault

F2

Robot vacuum stops shortly after starting and displays F2; may not respond to Start until power-cycled.

Main Control Board / Internal Electronics Fault

F20

Robot vacuum shows F20 and refuses to start; may indicate an internal memory or configuration error.

Non-Volatile Memory / Configuration Fault

F3

Robot vacuum reports F3 and refuses to start; may occur immediately after pressing Start or when placed on the dock.

Charging Circuit / Dock Communication Fault

F4

Robot vacuum shows F4 and stops; may occur when starting or during cleaning, often with no movement.

Drive Motor / Wheel Motor Fault

F5

Robot vacuum displays F5 and stops; may spin in place or fail to navigate correctly before error appears.

Steering / Orientation Sensor Fault

F6

Robot vacuum shows F6 and stops; may occur when approaching obstacles or walls.

Front Bumper / Collision Sensor Fault

F7

Robot vacuum displays F7 and stops near stairs or dark floor transitions; may refuse to move forward.

Cliff / Drop Sensor Fault

F8

Robot vacuum shows F8 and stops; may occur when turning or navigating around furniture.

Side Brush Motor / Side Sensor Fault

F9

Robot vacuum displays F9 and stops; may occur when the dust bin is inserted or removed.

Dust Bin Presence / Full Sensor Fault

Symptom

Robot vacuum avoids certain dark-colored rugs or refuses to cross dark floor patterns.

False Cliff Detection

Symptom

Robot vacuum does not charge; it sits on the dock but the battery level does not increase.

Charging Failure

Symptom

Robot vacuum does not respond to scheduled cleaning times; it never starts automatically.

Scheduling / Timer Malfunction

Symptom

Robot vacuum does not return to the charging station at the end of cleaning; it stops in random locations.

Docking / Return-to-Base Failure

Symptom

Robot vacuum does not start at all; no lights or sounds when pressing the power or Start button.

No Power / Dead Robot

Symptom

Robot vacuum emits a burning smell or excessive heat during or after operation.

Overheating / Electrical Fault

Symptom

Robot vacuum frequently reports that the dust bin is missing or not installed, even when it is in place (no specific code shown).

Dust Bin Detection Problem

Symptom

Robot vacuum gets stuck frequently on thresholds, rugs, or under furniture, even in areas it previously navigated.

Mobility / Clearance Issue

Symptom

Robot vacuum is very loud during operation; noise is higher than usual or includes rattling or grinding sounds.

Mechanical Noise / Worn Bearings

Symptom

Robot vacuum leaves lines of debris or fails to pick up dirt along edges and corners.

Ineffective Cleaning / Brush or Side Brush Wear

Symptom

Robot vacuum repeatedly bumps into walls and furniture without slowing down or adjusting course.

Obstacle Detection Failure

Symptom

Robot vacuum runs but has very weak suction; it picks up little debris even on hard floors.

Restricted Airflow / Clogged Filters

Symptom

Robot vacuum runs in circles or has difficulty driving straight; path appears erratic.

Navigation / Drive Imbalance

Symptom

Robot vacuum smells musty or dusty when running, even after emptying the bin.

Odor from Dust System

Symptom

Robot vacuum starts but shuts off after a few minutes; battery indicator may drop quickly.

Reduced Battery Capacity / Aged Battery

Symptom

Robot vacuum’s app connection is unstable; it frequently disconnects or fails to receive commands.

Unstable Wi‑Fi / App Connectivity

Symptom

Robot vacuum’s cleaning pattern is inefficient; it misses large areas or repeats the same area excessively.

Navigation / Mapping Inefficiency

Symptom

Robot vacuum’s front caster wheel does not rotate freely, causing drag marks or navigation issues.

Front Caster Wheel Jam

Symptom

Robot vacuum’s main brush does not spin, but the robot moves and suction works.

Main Brush Drive Failure

Symptom

Side brush does not spin or spins intermittently while the robot is cleaning.

Side Brush Drive Issue