Medisana
Medisana Humidifiers & Dehumidifiers Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
Advertisements
CF
Dehumidifier displays "CF" or "CL" indicating filter or cleaning reminder.
Filter Cleaning Reminder / Maintenance Indicator
E1
Humidifier will not start; display shows E1 immediately after power-on.
Room Temperature Sensor Fault
E2
Humidifier stops and displays E2; unit may start then shut down after a few seconds.
Humidity Sensor Fault
E3
Dehumidifier shows E3 and stops collecting water; compressor or fan may not start.
Evaporator Temperature Sensor Fault
E4
Dehumidifier displays E4 and will not run; sometimes appears after long operation or defrost cycle.
Defrost / Coil Temperature Sensor Fault
E5
Dehumidifier shows E5; compressor does not start or stops shortly after starting.
Compressor Overload / High Temperature Protection Fault
E6
Dehumidifier displays E6 and stops; fan may run but compressor does not.
Compressor Current / Overload Detection Error
E7
Dehumidifier shows E7; unit may beep and refuse to start.
Ambient Temperature Out of Range / Sensor Calibration Error
E8
Dehumidifier displays E8; fan may not run or runs erratically.
Fan Motor Fault / Fan Feedback Error
E9
Dehumidifier shows E9; unit may shut down unexpectedly.
Internal Communication Error Between Display PCB and Main PCB
F1
Humidifier shows F1 and stops producing mist.
Water Level Sensor Fault
F2
Humidifier displays F2; unit may beep and stop misting even with water in the tank.
Tank Presence / Tank Position Sensor Fault
F3
Humidifier shows F3; fan may run but no mist is produced.
Ultrasonic Transducer Overheat / Dry-Run Protection Fault
F4
Humidifier displays F4; unit may shut down shortly after starting mist.
Overheat Protection / Base Temperature Sensor Fault
F5
Humidifier shows F5; display may indicate fan or airflow error.
Fan Speed / Airflow Sensor Fault
Hi
Humidifier or dehumidifier display shows "Hi" for humidity and does not run as expected.
Humidity Above Measurement Range / Sensor Saturation
Lo
Humidifier display shows "Lo" and unit does not start misting.
Low Water Level Detected
P1
Dehumidifier shows P1 and stops; often associated with defrost mode.
Defrost Mode Active / Low Coil Temperature
P2
Dehumidifier shows P2 and stops; water bucket is full or appears full to the unit.
Bucket Full / Drain System Fault
Symptom
Dehumidifier display shows incorrect humidity readings compared to a separate hygrometer.
Humidity Sensor Drift or Contamination
Symptom
Dehumidifier emits a strong musty or dirty smell from the air outlet.
Mold and Dust Accumulation on Filter and Coils
Symptom
Dehumidifier freezes up; evaporator coil becomes a solid block of ice.
Improper Defrost or Low Airflow
Symptom
Dehumidifier leaks water from the bottom or around the bucket area.
Drainage System Blockage or Bucket Misalignment
Symptom
Dehumidifier makes loud grinding or squealing noises while running.
Fan Motor or Blower Wheel Failure
Symptom
Dehumidifier runs but does not collect water; humidity does not decrease.
Refrigeration System Failure or Low Refrigerant
Symptom
Dehumidifier will not start; display works but compressor and fan do not run.
Control Logic or Safety Interlock Issue
Symptom
Humidifier base becomes unusually hot to the touch.
Overheating of Power Electronics or Transducer
Symptom
Humidifier display or buttons do not respond correctly; random changes in settings.
Keypad or Control Panel Failure
Symptom
Humidifier emits a strong musty or moldy odor during operation.
Microbial Growth in Water Tank and Air Path
Symptom
Humidifier is very noisy, with rattling or buzzing sounds during operation.
Fan Imbalance or Loose Components
Symptom
Humidifier leaks water onto the table or floor.
Water Tank or Base Seal Leakage
Symptom
Humidifier leaves white dust on furniture and surfaces.
Mineral Residue from Hard Water
Symptom
Humidifier night-light or LED illumination works, but mist function does not start.
Partial PCB Failure Affecting Ultrasonic Circuit Only
Symptom
Humidifier produces very weak mist output even at maximum setting.
Reduced Ultrasonic Output Due to Scaling or Low Voltage
Symptom
Humidifier runs but produces no mist at all.
Ultrasonic Transducer Failure
Symptom
Humidifier shuts off unexpectedly after a short time, even with sufficient water.
Overheat or Power Supply Intermittent Fault
Symptom
Humidifier will not power on at all; no lights or display.
Power Supply or Main PCB Failure
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| CF |
Dehumidifier displays "CF" or "CL" indicating filter or cleaning reminder.
|
Filter Cleaning Reminder / Maintenance Indicator | View Details |
| E1 |
Humidifier will not start; display shows E1 immediately after power-on.
|
Room Temperature Sensor Fault | View Details |
| E2 |
Humidifier stops and displays E2; unit may start then shut down after a few seconds.
|
Humidity Sensor Fault | View Details |
| E3 |
Dehumidifier shows E3 and stops collecting water; compressor or fan may not start.
|
Evaporator Temperature Sensor Fault | View Details |
| E4 |
Dehumidifier displays E4 and will not run; sometimes appears after long operation or defrost cycle.
|
Defrost / Coil Temperature Sensor Fault | View Details |
| E5 |
Dehumidifier shows E5; compressor does not start or stops shortly after starting.
|
Compressor Overload / High Temperature Protection Fault | View Details |
| E6 |
Dehumidifier displays E6 and stops; fan may run but compressor does not.
|
Compressor Current / Overload Detection Error | View Details |
| E7 |
Dehumidifier shows E7; unit may beep and refuse to start.
|
Ambient Temperature Out of Range / Sensor Calibration Error | View Details |
| E8 |
Dehumidifier displays E8; fan may not run or runs erratically.
|
Fan Motor Fault / Fan Feedback Error | View Details |
| E9 |
Dehumidifier shows E9; unit may shut down unexpectedly.
|
Internal Communication Error Between Display PCB and Main PCB | View Details |
| F1 |
Humidifier shows F1 and stops producing mist.
|
Water Level Sensor Fault | View Details |
| F2 |
Humidifier displays F2; unit may beep and stop misting even with water in the tank.
|
Tank Presence / Tank Position Sensor Fault | View Details |
| F3 |
Humidifier shows F3; fan may run but no mist is produced.
|
Ultrasonic Transducer Overheat / Dry-Run Protection Fault | View Details |
| F4 |
Humidifier displays F4; unit may shut down shortly after starting mist.
|
Overheat Protection / Base Temperature Sensor Fault | View Details |
| F5 |
Humidifier shows F5; display may indicate fan or airflow error.
|
Fan Speed / Airflow Sensor Fault | View Details |
| Hi |
Humidifier or dehumidifier display shows "Hi" for humidity and does not run as expected.
|
Humidity Above Measurement Range / Sensor Saturation | View Details |
| Lo |
Humidifier display shows "Lo" and unit does not start misting.
|
Low Water Level Detected | View Details |
| P1 |
Dehumidifier shows P1 and stops; often associated with defrost mode.
|
Defrost Mode Active / Low Coil Temperature | View Details |
| P2 |
Dehumidifier shows P2 and stops; water bucket is full or appears full to the unit.
|
Bucket Full / Drain System Fault | View Details |
| – |
Dehumidifier display shows incorrect humidity readings compared to a separate hygrometer.
|
Humidity Sensor Drift or Contamination | View Details |
| – |
Dehumidifier emits a strong musty or dirty smell from the air outlet.
|
Mold and Dust Accumulation on Filter and Coils | View Details |
| – |
Dehumidifier freezes up; evaporator coil becomes a solid block of ice.
|
Improper Defrost or Low Airflow | View Details |
| – |
Dehumidifier leaks water from the bottom or around the bucket area.
|
Drainage System Blockage or Bucket Misalignment | View Details |
| – |
Dehumidifier makes loud grinding or squealing noises while running.
|
Fan Motor or Blower Wheel Failure | View Details |
| – |
Dehumidifier runs but does not collect water; humidity does not decrease.
|
Refrigeration System Failure or Low Refrigerant | View Details |
| – |
Dehumidifier will not start; display works but compressor and fan do not run.
|
Control Logic or Safety Interlock Issue | View Details |
| – |
Humidifier base becomes unusually hot to the touch.
|
Overheating of Power Electronics or Transducer | View Details |
| – |
Humidifier display or buttons do not respond correctly; random changes in settings.
|
Keypad or Control Panel Failure | View Details |
| – |
Humidifier emits a strong musty or moldy odor during operation.
|
Microbial Growth in Water Tank and Air Path | View Details |
| – |
Humidifier is very noisy, with rattling or buzzing sounds during operation.
|
Fan Imbalance or Loose Components | View Details |
| – |
Humidifier leaks water onto the table or floor.
|
Water Tank or Base Seal Leakage | View Details |
| – |
Humidifier leaves white dust on furniture and surfaces.
|
Mineral Residue from Hard Water | View Details |
| – |
Humidifier night-light or LED illumination works, but mist function does not start.
|
Partial PCB Failure Affecting Ultrasonic Circuit Only | View Details |
| – |
Humidifier produces very weak mist output even at maximum setting.
|
Reduced Ultrasonic Output Due to Scaling or Low Voltage | View Details |
| – |
Humidifier runs but produces no mist at all.
|
Ultrasonic Transducer Failure | View Details |
| – |
Humidifier shuts off unexpectedly after a short time, even with sufficient water.
|
Overheat or Power Supply Intermittent Fault | View Details |
| – |
Humidifier will not power on at all; no lights or display.
|
Power Supply or Main PCB Failure | View Details |
No matching codes found
Advertisements