Samsung Air Conditioners Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E101
Indoor unit will not start; display shows E101 shortly after power-on.
Indoor-Outdoor Communication Error
E102
Indoor unit runs briefly then stops; display shows E102.
Indoor Unit EEPROM or PCB Fault
E103
Unit does not cool; indoor fan may run; E103 displayed on indoor unit.
Outdoor Unit Communication or Power Supply Error
E104
Indoor unit stops and displays E104; may occur during high load or hot weather.
High Discharge Temperature / Compressor Overheating
E105
Unit stops cooling and shows E105; may occur after long operation.
Outdoor Unit Overcurrent / Compressor Overload
E121
Indoor unit displays E121 and stops; fan may still respond.
Indoor Room Temperature Sensor (Thermistor) Error
E122
Indoor unit shows E122; unit may not respond to temperature changes.
Indoor Evaporator Coil Temperature Sensor Error
E123
E123 displayed; unit may shut down prematurely or not start.
Indoor Pipe (Liquid Line) Temperature Sensor Error
E154
Indoor unit displays E154; outdoor unit may not start.
Outdoor Fan Motor Error
E163
E163 appears; unit may not cool or heat properly.
Outdoor Discharge Temperature Sensor Error
E201
Indoor unit shows E201; unit may not respond to remote commands.
Indoor-Outdoor Communication Error (Addressing / Protocol)
E221
E221 displayed; unit may shut down during operation.
Indoor Fan Motor Error (DC Motor Feedback Fault)
E231
Indoor unit shows E231; unit may not cool or heat.
4-Way Reversing Valve Coil Error
E251
E251 appears; unit may not start compressor.
Compressor Position / Inverter Error (BLDC Compressor)
E416
Indoor unit shows E416; unit may shut down unexpectedly.
Indoor Unit Power Supply Overvoltage / Undervoltage
E422
E422 displayed; unit may not start or may shut down intermittently.
Outdoor Unit Power Supply Error
E440
Indoor unit shows E440; system may not operate.
Indoor-Outdoor Mismatch or Configuration Error
E454
E454 appears; unit may not start compressor.
Outdoor Unit Overcurrent / Inverter Protection
E461
Indoor unit shows E461; unit may not respond or may shut down.
Indoor EEPROM or Configuration Error
E462
E462 displayed; system may not operate.
Outdoor EEPROM or Configuration Error
E471
Indoor unit shows E471; unit may not start or may shut down.
Indoor Drain Pump Error (if equipped)
E481
E481 displayed; unit may not respond to remote.
Indoor Remote Control Receiver Error
E554
E554 appears; unit may not start or may shut down quickly.
Refrigerant System Protection (Low or High Pressure)
Symptom
Air conditioner runs but does not cool effectively; air from indoor unit is only slightly cool or room never reaches set temperature.
Insufficient Cooling Capacity / Poor Performance
Symptom
Evaporator coil inside indoor unit freezes over with ice.
Evaporator Coil Icing
Symptom
Indoor unit emits a musty or moldy smell when starting.
Biological Growth on Evaporator and Drain Pan
Symptom
Indoor unit has power but will not start cooling; only fan runs even when COOL mode is selected.
Compressor Not Starting
Symptom
Indoor unit makes loud rattling or buzzing noises during operation.
Mechanical Vibration or Loose Components
Symptom
Outdoor unit makes loud grinding, squealing, or rattling noises.
Outdoor Fan or Compressor Mechanical Fault
Symptom
Outdoor unit runs but indoor fan does not blow air.
Indoor Fan Motor Failure
Symptom
Remote control does not operate the indoor unit, but unit can be controlled by buttons on the unit (if present).
Remote Control or IR Receiver Failure
Symptom
Unit blows warm air in COOL mode or cold air in HEAT mode (reversed operation).
Reversing Valve Stuck or Misoperating
Symptom
Unit displays lights or indicators but does not respond to any buttons on the unit or remote.
Control Lock / Child Lock or PCB Hang
Symptom
Unit does not turn on at all; no lights or display on indoor unit.
No Power to Indoor Unit
Symptom
Unit frequently turns on and off (short cycling) without reaching set temperature.
Short Cycling / Incorrect Sensing
Symptom
Unit operates but energy consumption seems unusually high.
Inefficient Operation / Energy Waste
Symptom
Unit runs but airflow from indoor unit is very weak even at high fan speed.
Restricted Airflow / Blower Contamination
Symptom
Unit trips the circuit breaker shortly after starting.
Electrical Overload or Short Circuit
Symptom
Water leaking from indoor unit onto wall or floor.
Condensate Drain Blockage or Misrouting
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E101 |
Indoor unit will not start; display shows E101 shortly after power-on.
|
Indoor-Outdoor Communication Error | View Details |
| E102 |
Indoor unit runs briefly then stops; display shows E102.
|
Indoor Unit EEPROM or PCB Fault | View Details |
| E103 |
Unit does not cool; indoor fan may run; E103 displayed on indoor unit.
|
Outdoor Unit Communication or Power Supply Error | View Details |
| E104 |
Indoor unit stops and displays E104; may occur during high load or hot weather.
|
High Discharge Temperature / Compressor Overheating | View Details |
| E105 |
Unit stops cooling and shows E105; may occur after long operation.
|
Outdoor Unit Overcurrent / Compressor Overload | View Details |
| E121 |
Indoor unit displays E121 and stops; fan may still respond.
|
Indoor Room Temperature Sensor (Thermistor) Error | View Details |
| E122 |
Indoor unit shows E122; unit may not respond to temperature changes.
|
Indoor Evaporator Coil Temperature Sensor Error | View Details |
| E123 |
E123 displayed; unit may shut down prematurely or not start.
|
Indoor Pipe (Liquid Line) Temperature Sensor Error | View Details |
| E154 |
Indoor unit displays E154; outdoor unit may not start.
|
Outdoor Fan Motor Error | View Details |
| E163 |
E163 appears; unit may not cool or heat properly.
|
Outdoor Discharge Temperature Sensor Error | View Details |
| E201 |
Indoor unit shows E201; unit may not respond to remote commands.
|
Indoor-Outdoor Communication Error (Addressing / Protocol) | View Details |
| E221 |
E221 displayed; unit may shut down during operation.
|
Indoor Fan Motor Error (DC Motor Feedback Fault) | View Details |
| E231 |
Indoor unit shows E231; unit may not cool or heat.
|
4-Way Reversing Valve Coil Error | View Details |
| E251 |
E251 appears; unit may not start compressor.
|
Compressor Position / Inverter Error (BLDC Compressor) | View Details |
| E416 |
Indoor unit shows E416; unit may shut down unexpectedly.
|
Indoor Unit Power Supply Overvoltage / Undervoltage | View Details |
| E422 |
E422 displayed; unit may not start or may shut down intermittently.
|
Outdoor Unit Power Supply Error | View Details |
| E440 |
Indoor unit shows E440; system may not operate.
|
Indoor-Outdoor Mismatch or Configuration Error | View Details |
| E454 |
E454 appears; unit may not start compressor.
|
Outdoor Unit Overcurrent / Inverter Protection | View Details |
| E461 |
Indoor unit shows E461; unit may not respond or may shut down.
|
Indoor EEPROM or Configuration Error | View Details |
| E462 |
E462 displayed; system may not operate.
|
Outdoor EEPROM or Configuration Error | View Details |
| E471 |
Indoor unit shows E471; unit may not start or may shut down.
|
Indoor Drain Pump Error (if equipped) | View Details |
| E481 |
E481 displayed; unit may not respond to remote.
|
Indoor Remote Control Receiver Error | View Details |
| E554 |
E554 appears; unit may not start or may shut down quickly.
|
Refrigerant System Protection (Low or High Pressure) | View Details |
| – |
Air conditioner runs but does not cool effectively; air from indoor unit is only slightly cool or room never reaches set temperature.
|
Insufficient Cooling Capacity / Poor Performance | View Details |
| – |
Evaporator coil inside indoor unit freezes over with ice.
|
Evaporator Coil Icing | View Details |
| – |
Indoor unit emits a musty or moldy smell when starting.
|
Biological Growth on Evaporator and Drain Pan | View Details |
| – |
Indoor unit has power but will not start cooling; only fan runs even when COOL mode is selected.
|
Compressor Not Starting | View Details |
| – |
Indoor unit makes loud rattling or buzzing noises during operation.
|
Mechanical Vibration or Loose Components | View Details |
| – |
Outdoor unit makes loud grinding, squealing, or rattling noises.
|
Outdoor Fan or Compressor Mechanical Fault | View Details |
| – |
Outdoor unit runs but indoor fan does not blow air.
|
Indoor Fan Motor Failure | View Details |
| – |
Remote control does not operate the indoor unit, but unit can be controlled by buttons on the unit (if present).
|
Remote Control or IR Receiver Failure | View Details |
| – |
Unit blows warm air in COOL mode or cold air in HEAT mode (reversed operation).
|
Reversing Valve Stuck or Misoperating | View Details |
| – |
Unit displays lights or indicators but does not respond to any buttons on the unit or remote.
|
Control Lock / Child Lock or PCB Hang | View Details |
| – |
Unit does not turn on at all; no lights or display on indoor unit.
|
No Power to Indoor Unit | View Details |
| – |
Unit frequently turns on and off (short cycling) without reaching set temperature.
|
Short Cycling / Incorrect Sensing | View Details |
| – |
Unit operates but energy consumption seems unusually high.
|
Inefficient Operation / Energy Waste | View Details |
| – |
Unit runs but airflow from indoor unit is very weak even at high fan speed.
|
Restricted Airflow / Blower Contamination | View Details |
| – |
Unit trips the circuit breaker shortly after starting.
|
Electrical Overload or Short Circuit | View Details |
| – |
Water leaking from indoor unit onto wall or floor.
|
Condensate Drain Blockage or Misrouting | View Details |
No matching codes found
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