Haier 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
Dehumidifier stops and displays E1 on the control panel; buttons may not respond or unit may not start.
Room Temperature Sensor (Ambient Thermistor) Fault
E2
Dehumidifier displays E2 and will not run or shuts off shortly after starting.
Evaporator Coil Temperature Sensor Fault
E3
Dehumidifier shows E3 and compressor will not start or runs briefly then stops.
Humidity Sensor (RH Sensor) Fault
E4
Dehumidifier displays E4 and stops running; may occur after long operation or in very cold rooms.
Defrost / Anti-Frost Protection or Refrigeration System Fault
E5
Dehumidifier shows E5 and will not start or shuts down shortly after starting.
Compressor Overload / High Temperature Protection Fault
E6
Dehumidifier displays E6 and does not dehumidify; fan may run but compressor does not engage.
Communication Error Between Display Board and Main Control Board
E7
Dehumidifier shows E7 and will not operate normally; some buttons may not respond.
Keypad / Control Panel Fault
E8
Dehumidifier displays E8 and stops; may be accompanied by unusual noises or no compressor operation.
Fan Motor or Fan Feedback Fault
E9
Dehumidifier shows E9 and shuts down; may occur after power fluctuations or storms.
EEPROM / Memory Error on Main Control Board
F0
Dehumidifier shows F0 and does not respond to controls or will not start.
General Sensor or Control Fault (Model-Dependent)
F1
Dehumidifier displays F1 and will not operate; may be accompanied by beeping.
Ambient Temperature Sensor Error (Alternate Code)
F2
Dehumidifier shows F2 and stops; fan may still run.
Evaporator Temperature Sensor Error (Alternate Code)
F3
Dehumidifier displays F3 and will not regulate humidity correctly; may not start.
Humidity Sensor Error (Alternate Code)
F4
Dehumidifier shows F4 and shuts down; may be associated with pump models.
Pump Failure / Pump Sensor Error (Alternate Code)
H1
Humidifier (Haier room humidifier) displays H1 and stops adding moisture.
Low Water Level / Tank Empty Protection
H2
Humidifier displays H2 and will not produce mist; fan may still run.
Humidity Sensor Fault (Humidifier)
H3
Humidifier shows H3 and shuts down; may feel hot to the touch.
Overheat Protection / Heater or Ultrasonic Module Overload
P1
Dehumidifier displays P1 and stops collecting water; fan may continue to run briefly.
Defrost Mode / Coil Protection Active
P2
Dehumidifier displays P2 and stops; bucket is full or appears full to the unit.
Bucket Full / Water Level Switch Activated
P3
Dehumidifier shows P3 and will not start dehumidifying; may be associated with continuous drain mode.
Pump or Continuous Drain Protection (on pump-equipped models)
P4
Dehumidifier displays P4 and stops; may occur after long operation or in hot environments.
High Temperature Protection / Overheat Fault
Symptom
Controls on the dehumidifier or humidifier are unresponsive; buttons do not change settings.
User Interface / Keypad Failure
Symptom
Dehumidifier emits a burning or electrical smell.
Overheating Electrical Component
Symptom
Dehumidifier emits a musty or moldy odor from the air outlet.
Biological Growth in Water Path and Coils
Symptom
Dehumidifier fan does not run; compressor may start and then shut down quickly.
Fan Motor Failure
Symptom
Dehumidifier freezes up; evaporator coil becomes a solid block of ice.
Evaporator Coil Icing
Symptom
Dehumidifier is very noisy during operation; rattling, buzzing, or grinding sounds.
Mechanical Vibration or Loose Component
Symptom
Dehumidifier leaks water onto the floor instead of into the bucket or drain hose.
Water Management / Drainage Fault
Symptom
Dehumidifier powers on but compressor never starts; fan runs continuously and no water is collected.
Compressor Start Circuit Failure
Symptom
Dehumidifier runs briefly then shuts off; bucket is not full and no error code is shown.
Overheat or Thermal Overload Trip
Symptom
Dehumidifier runs but does not collect water; humidity in the room remains high.
Refrigerant Loss / Sealed System Failure
Symptom
Dehumidifier short cycles; turns on and off frequently without reaching set humidity.
Humidity Control / Cycling Issue
Symptom
Dehumidifier shows 'bucket full' light even when the bucket is empty and properly installed.
False Bucket Full Detection
Symptom
Dehumidifier will not turn on at all; no lights or display.
No Power / Main Power Circuit Failure
Symptom
Display shows incorrect humidity readings (e.g., always 30% or always 80%) regardless of room conditions.
Humidity Sensor Calibration / Failure
Symptom
Humidifier is excessively loud or vibrates on the table.
Fan or Motor Imbalance
Symptom
Humidifier leaks water around the base.
Tank or Base Seal Failure
Symptom
Humidifier runs but produces little or no mist.
Low Output / Mist Generation Failure
Symptom
Humidifier shuts off unexpectedly even though the timer is not set and water is available.
Auto-Shutoff / Protection Triggering
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E1 |
Dehumidifier stops and displays E1 on the control panel; buttons may not respond or unit may not start.
|
Room Temperature Sensor (Ambient Thermistor) Fault | View Details |
| E2 |
Dehumidifier displays E2 and will not run or shuts off shortly after starting.
|
Evaporator Coil Temperature Sensor Fault | View Details |
| E3 |
Dehumidifier shows E3 and compressor will not start or runs briefly then stops.
|
Humidity Sensor (RH Sensor) Fault | View Details |
| E4 |
Dehumidifier displays E4 and stops running; may occur after long operation or in very cold rooms.
|
Defrost / Anti-Frost Protection or Refrigeration System Fault | View Details |
| E5 |
Dehumidifier shows E5 and will not start or shuts down shortly after starting.
|
Compressor Overload / High Temperature Protection Fault | View Details |
| E6 |
Dehumidifier displays E6 and does not dehumidify; fan may run but compressor does not engage.
|
Communication Error Between Display Board and Main Control Board | View Details |
| E7 |
Dehumidifier shows E7 and will not operate normally; some buttons may not respond.
|
Keypad / Control Panel Fault | View Details |
| E8 |
Dehumidifier displays E8 and stops; may be accompanied by unusual noises or no compressor operation.
|
Fan Motor or Fan Feedback Fault | View Details |
| E9 |
Dehumidifier shows E9 and shuts down; may occur after power fluctuations or storms.
|
EEPROM / Memory Error on Main Control Board | View Details |
| F0 |
Dehumidifier shows F0 and does not respond to controls or will not start.
|
General Sensor or Control Fault (Model-Dependent) | View Details |
| F1 |
Dehumidifier displays F1 and will not operate; may be accompanied by beeping.
|
Ambient Temperature Sensor Error (Alternate Code) | View Details |
| F2 |
Dehumidifier shows F2 and stops; fan may still run.
|
Evaporator Temperature Sensor Error (Alternate Code) | View Details |
| F3 |
Dehumidifier displays F3 and will not regulate humidity correctly; may not start.
|
Humidity Sensor Error (Alternate Code) | View Details |
| F4 |
Dehumidifier shows F4 and shuts down; may be associated with pump models.
|
Pump Failure / Pump Sensor Error (Alternate Code) | View Details |
| H1 |
Humidifier (Haier room humidifier) displays H1 and stops adding moisture.
|
Low Water Level / Tank Empty Protection | View Details |
| H2 |
Humidifier displays H2 and will not produce mist; fan may still run.
|
Humidity Sensor Fault (Humidifier) | View Details |
| H3 |
Humidifier shows H3 and shuts down; may feel hot to the touch.
|
Overheat Protection / Heater or Ultrasonic Module Overload | View Details |
| P1 |
Dehumidifier displays P1 and stops collecting water; fan may continue to run briefly.
|
Defrost Mode / Coil Protection Active | View Details |
| P2 |
Dehumidifier displays P2 and stops; bucket is full or appears full to the unit.
|
Bucket Full / Water Level Switch Activated | View Details |
| P3 |
Dehumidifier shows P3 and will not start dehumidifying; may be associated with continuous drain mode.
|
Pump or Continuous Drain Protection (on pump-equipped models) | View Details |
| P4 |
Dehumidifier displays P4 and stops; may occur after long operation or in hot environments.
|
High Temperature Protection / Overheat Fault | View Details |
| – |
Controls on the dehumidifier or humidifier are unresponsive; buttons do not change settings.
|
User Interface / Keypad Failure | View Details |
| – |
Dehumidifier emits a burning or electrical smell.
|
Overheating Electrical Component | View Details |
| – |
Dehumidifier emits a musty or moldy odor from the air outlet.
|
Biological Growth in Water Path and Coils | View Details |
| – |
Dehumidifier fan does not run; compressor may start and then shut down quickly.
|
Fan Motor Failure | View Details |
| – |
Dehumidifier freezes up; evaporator coil becomes a solid block of ice.
|
Evaporator Coil Icing | View Details |
| – |
Dehumidifier is very noisy during operation; rattling, buzzing, or grinding sounds.
|
Mechanical Vibration or Loose Component | View Details |
| – |
Dehumidifier leaks water onto the floor instead of into the bucket or drain hose.
|
Water Management / Drainage Fault | View Details |
| – |
Dehumidifier powers on but compressor never starts; fan runs continuously and no water is collected.
|
Compressor Start Circuit Failure | View Details |
| – |
Dehumidifier runs briefly then shuts off; bucket is not full and no error code is shown.
|
Overheat or Thermal Overload Trip | View Details |
| – |
Dehumidifier runs but does not collect water; humidity in the room remains high.
|
Refrigerant Loss / Sealed System Failure | View Details |
| – |
Dehumidifier short cycles; turns on and off frequently without reaching set humidity.
|
Humidity Control / Cycling Issue | View Details |
| – |
Dehumidifier shows 'bucket full' light even when the bucket is empty and properly installed.
|
False Bucket Full Detection | View Details |
| – |
Dehumidifier will not turn on at all; no lights or display.
|
No Power / Main Power Circuit Failure | View Details |
| – |
Display shows incorrect humidity readings (e.g., always 30% or always 80%) regardless of room conditions.
|
Humidity Sensor Calibration / Failure | View Details |
| – |
Humidifier is excessively loud or vibrates on the table.
|
Fan or Motor Imbalance | View Details |
| – |
Humidifier leaks water around the base.
|
Tank or Base Seal Failure | View Details |
| – |
Humidifier runs but produces little or no mist.
|
Low Output / Mist Generation Failure | View Details |
| – |
Humidifier shuts off unexpectedly even though the timer is not set and water is available.
|
Auto-Shutoff / Protection Triggering | View Details |
No matching codes found
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