Panasonic Humidifiers & Dehumidifiers Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E1
Display shows E1; unit may not respond to controls.
Keypad / Control Panel Error
E2
Display shows E2; unit may shut down unexpectedly.
Water Tank Full Detection Error
E3
Display shows E3; unit may not start or may shut down after a short run.
Defrost / Frost Protection Error
E4
Display shows E4; compressor does not run.
High Temperature / Overheat Protection
E5
Display shows E5; unit may not power on or may shut off immediately.
Power Supply / Voltage Error
F0
Display shows F0 and unit will not start dehumidifying.
Room Temperature Out of Operating Range
F1
Display shows F1; unit may run fan only and not dehumidify properly.
Humidity Sensor Out of Range / Calibration Error
F2
Display shows F2; unit may shut down or not start.
Room Temperature Sensor Error (Open/Short)
F3
Display shows F3; unit may stop during operation.
Evaporator Temperature Sensor Error
F4
Display shows F4; compressor does not run.
Compressor Temperature Sensor Error
H11
Dehumidifier will not start; display shows H11 and operation lamp may blink.
Indoor–Main Control Communication Error
H12
Dehumidifier stops and displays H12; fan may still run briefly then shut down.
Indoor Fan Motor Lock / Fan Feedback Error
H14
Unit stops dehumidifying and shows H14; compressor does not run.
Indoor Temperature Sensor (Thermistor) Fault
H15
Dehumidifier shows H15 and stops; compressor will not start.
Compressor Temperature Sensor Fault
H16
Unit attempts to start but shuts down with H16; compressor does not run or runs briefly then stops.
Compressor Overcurrent / Drive Protection
H19
Unit stops and displays H19; fan may run but no dehumidification.
Indoor Fan Motor Position / Feedback Error
H21
Dehumidifier stops and shows H21; water tank may not be full.
Float Switch / Water Level Sensor Error
H23
Unit displays H23 and stops; may occur in low temperature environments.
Evaporator Coil Temperature Sensor Fault
H24
Dehumidifier shows H24 and stops; may occur during defrost or in cold rooms.
Defrost Sensor / Low Temperature Protection Error
H25
Unit stops and displays H25; may occur after long operation.
Condensate Pump / Drain Pump Error (for models with built‑in pump)
H27
Dehumidifier shows H27 and stops; may be associated with abnormal humidity readings.
Humidity Sensor (RH Sensor) Fault
H28
Unit displays H28; humidity reading may be frozen or unrealistic.
Humidity Sensor Communication / Calibration Error
H30
Dehumidifier stops and shows H30; may be accompanied by unusual compressor behavior.
Refrigerant System Protection / Abnormal Pressure Detection
Symptom
Dehumidifier display is dim, flickering, or unreadable, but the unit still runs.
Display Backlight / LCD Failure
Symptom
Dehumidifier fan runs but airflow is very weak from the front grille.
Restricted Airflow / Fan Performance Issue
Symptom
Dehumidifier leaks water onto the floor instead of into the tank or drain hose.
Condensate Leakage / Drainage Fault
Symptom
Dehumidifier runs but blows warm, slightly damp air; room does not feel drier.
Inefficient Dehumidification / Airflow or Coil Issue
Symptom
Dehumidifier runs but does not collect water; humidity in the room remains high.
Loss of Refrigerant Charge / Low Cooling Capacity
Symptom
Dehumidifier shuts off after a short time even though the room is still humid.
Premature Humidity Satisfied / Sensor Misreading
Symptom
Dehumidifier vibrates excessively and may move or rattle nearby objects.
Imbalance / Structural Vibration
Symptom
Dehumidifier will not start; tank full light is on even when the tank is empty and correctly installed.
False Tank Full Detection
Symptom
Humidifier (Panasonic room humidifier) runs but produces little or no visible mist.
Low Humidification Output
Symptom
Humidifier produces white dust on nearby surfaces.
Mineral Aerosolization (Ultrasonic Humidifier)
Symptom
Humidifier shuts off even though the tank is full and the room is dry.
Water Level Detection Fault (Humidifier)
Symptom
Unit cycles on and off rapidly (short cycling) without reaching the humidity setpoint.
Control or Sensor Instability
Symptom
Unit emits a burning or electrical smell when running.
Overheating Electrical Component
Symptom
Unit emits a musty or moldy odor during operation.
Biological Growth in Drain Pan and Coils
Symptom
Unit frequently forms thick ice on the evaporator coil and stops dehumidifying.
Evaporator Icing / Defrost Failure
Symptom
Unit is very noisy during operation; rattling, buzzing, or grinding sounds are heard.
Mechanical Vibration / Fan or Compressor Noise
Symptom
Unit powers on but buttons do not respond or respond intermittently.
Keypad / User Interface Failure
Symptom
Unit powers on but compressor never starts; only the fan runs continuously.
Compressor Start Failure
Symptom
Unit will not power on at all; no lights or display.
No Power / Dead Unit
Symptom
Water tank does not fill even though the unit appears to be running normally.
Bypassed or Misrouted Condensate
Symptom
Water tank fills very quickly or overflows; humidity seems normal.
Excessive Condensate Production / High Load or Sensor Error
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E1 |
Display shows E1; unit may not respond to controls.
|
Keypad / Control Panel Error | View Details |
| E2 |
Display shows E2; unit may shut down unexpectedly.
|
Water Tank Full Detection Error | View Details |
| E3 |
Display shows E3; unit may not start or may shut down after a short run.
|
Defrost / Frost Protection Error | View Details |
| E4 |
Display shows E4; compressor does not run.
|
High Temperature / Overheat Protection | View Details |
| E5 |
Display shows E5; unit may not power on or may shut off immediately.
|
Power Supply / Voltage Error | View Details |
| F0 |
Display shows F0 and unit will not start dehumidifying.
|
Room Temperature Out of Operating Range | View Details |
| F1 |
Display shows F1; unit may run fan only and not dehumidify properly.
|
Humidity Sensor Out of Range / Calibration Error | View Details |
| F2 |
Display shows F2; unit may shut down or not start.
|
Room Temperature Sensor Error (Open/Short) | View Details |
| F3 |
Display shows F3; unit may stop during operation.
|
Evaporator Temperature Sensor Error | View Details |
| F4 |
Display shows F4; compressor does not run.
|
Compressor Temperature Sensor Error | View Details |
| H11 |
Dehumidifier will not start; display shows H11 and operation lamp may blink.
|
Indoor–Main Control Communication Error | View Details |
| H12 |
Dehumidifier stops and displays H12; fan may still run briefly then shut down.
|
Indoor Fan Motor Lock / Fan Feedback Error | View Details |
| H14 |
Unit stops dehumidifying and shows H14; compressor does not run.
|
Indoor Temperature Sensor (Thermistor) Fault | View Details |
| H15 |
Dehumidifier shows H15 and stops; compressor will not start.
|
Compressor Temperature Sensor Fault | View Details |
| H16 |
Unit attempts to start but shuts down with H16; compressor does not run or runs briefly then stops.
|
Compressor Overcurrent / Drive Protection | View Details |
| H19 |
Unit stops and displays H19; fan may run but no dehumidification.
|
Indoor Fan Motor Position / Feedback Error | View Details |
| H21 |
Dehumidifier stops and shows H21; water tank may not be full.
|
Float Switch / Water Level Sensor Error | View Details |
| H23 |
Unit displays H23 and stops; may occur in low temperature environments.
|
Evaporator Coil Temperature Sensor Fault | View Details |
| H24 |
Dehumidifier shows H24 and stops; may occur during defrost or in cold rooms.
|
Defrost Sensor / Low Temperature Protection Error | View Details |
| H25 |
Unit stops and displays H25; may occur after long operation.
|
Condensate Pump / Drain Pump Error (for models with built‑in pump) | View Details |
| H27 |
Dehumidifier shows H27 and stops; may be associated with abnormal humidity readings.
|
Humidity Sensor (RH Sensor) Fault | View Details |
| H28 |
Unit displays H28; humidity reading may be frozen or unrealistic.
|
Humidity Sensor Communication / Calibration Error | View Details |
| H30 |
Dehumidifier stops and shows H30; may be accompanied by unusual compressor behavior.
|
Refrigerant System Protection / Abnormal Pressure Detection | View Details |
| – |
Dehumidifier display is dim, flickering, or unreadable, but the unit still runs.
|
Display Backlight / LCD Failure | View Details |
| – |
Dehumidifier fan runs but airflow is very weak from the front grille.
|
Restricted Airflow / Fan Performance Issue | View Details |
| – |
Dehumidifier leaks water onto the floor instead of into the tank or drain hose.
|
Condensate Leakage / Drainage Fault | View Details |
| – |
Dehumidifier runs but blows warm, slightly damp air; room does not feel drier.
|
Inefficient Dehumidification / Airflow or Coil Issue | View Details |
| – |
Dehumidifier runs but does not collect water; humidity in the room remains high.
|
Loss of Refrigerant Charge / Low Cooling Capacity | View Details |
| – |
Dehumidifier shuts off after a short time even though the room is still humid.
|
Premature Humidity Satisfied / Sensor Misreading | View Details |
| – |
Dehumidifier vibrates excessively and may move or rattle nearby objects.
|
Imbalance / Structural Vibration | View Details |
| – |
Dehumidifier will not start; tank full light is on even when the tank is empty and correctly installed.
|
False Tank Full Detection | View Details |
| – |
Humidifier (Panasonic room humidifier) runs but produces little or no visible mist.
|
Low Humidification Output | View Details |
| – |
Humidifier produces white dust on nearby surfaces.
|
Mineral Aerosolization (Ultrasonic Humidifier) | View Details |
| – |
Humidifier shuts off even though the tank is full and the room is dry.
|
Water Level Detection Fault (Humidifier) | View Details |
| – |
Unit cycles on and off rapidly (short cycling) without reaching the humidity setpoint.
|
Control or Sensor Instability | View Details |
| – |
Unit emits a burning or electrical smell when running.
|
Overheating Electrical Component | View Details |
| – |
Unit emits a musty or moldy odor during operation.
|
Biological Growth in Drain Pan and Coils | View Details |
| – |
Unit frequently forms thick ice on the evaporator coil and stops dehumidifying.
|
Evaporator Icing / Defrost Failure | View Details |
| – |
Unit is very noisy during operation; rattling, buzzing, or grinding sounds are heard.
|
Mechanical Vibration / Fan or Compressor Noise | View Details |
| – |
Unit powers on but buttons do not respond or respond intermittently.
|
Keypad / User Interface Failure | View Details |
| – |
Unit powers on but compressor never starts; only the fan runs continuously.
|
Compressor Start Failure | View Details |
| – |
Unit will not power on at all; no lights or display.
|
No Power / Dead Unit | View Details |
| – |
Water tank does not fill even though the unit appears to be running normally.
|
Bypassed or Misrouted Condensate | View Details |
| – |
Water tank fills very quickly or overflows; humidity seems normal.
|
Excessive Condensate Production / High Load or Sensor Error | View Details |
No matching codes found
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