Sencor
Sencor 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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E0
Unit will not respond to remote control, front panel may still work, display shows E0.
Communication Error Between Main PCB and Display/IR Board
E1
Unit stops cooling and displays E1, fan may still run.
Room (Ambient) Temperature Sensor Fault
E2
Unit stops cooling or heating and displays E2, compressor may not start.
Evaporator Coil Temperature Sensor Fault
E3
Unit displays E3 and stops cooling, outdoor or rear section may shut down.
Condenser Coil Temperature Sensor Fault
E4
Unit shows E4 and stops, often after running for some time; may be associated with defrost or overheat protection.
Evaporator Overheat / Defrost Protection Error
E5
Unit displays E5 and compressor does not start or stops shortly after starting.
Overcurrent / Compressor Protection Error
E6
Unit shows E6, may not respond correctly to mode changes, sometimes associated with indoor–outdoor communication on split systems.
Communication Error Between Indoor and Outdoor Units
E7
Unit displays E7 and may not start compressor or fan correctly.
Mode Conflict / Reversing Valve or Control Logic Error
E8
Unit shows E8 and shuts down, often after running at high fan speed or in very hot conditions.
Overload / High Temperature Protection
E9
Unit displays E9 and stops, often accompanied by water leakage or full tank indicator on portable models.
Full Condensate Tank / Water Level Sensor Error
EC
Display shows EC, unit may run briefly then stop cooling.
Refrigerant Leak / Low Pressure Protection
F0
Display shows F0 and unit may not cool properly.
Low Refrigerant / System Undercharge Indication
F1
Display shows F1, unit may run fan only or stop cooling.
Indoor Fan Motor Feedback / Hall Sensor Error
F2
Display shows F2, unit may shut down or run erratically.
Outdoor Fan Motor Error (Split or Dual-Fan Models)
F3
Display shows F3, unit may stop heating or cooling correctly.
Outdoor Ambient Temperature Sensor Fault
F4
Display shows F4, unit may not start compressor or may shut down quickly.
Discharge Pipe Temperature Sensor Fault
F5
Display shows F5, unit may not defrost properly or may shut down in heating mode.
Outdoor Coil Temperature Sensor Fault
H1
Display shows H1, unit runs in heating mode but indoor fan may stop or slow down.
Defrost / Preheat Protection Mode Indication
H3
Display shows H3 and unit shuts down, often in high load conditions.
Compressor Overload Protection
H4
Display shows H4, unit may not start compressor.
Inverter Module / Compressor Drive Protection
H5
Display shows H5, unit may not operate or may shut down shortly after starting.
IPM (Intelligent Power Module) Protection
P0
Display shows P0, unit may limit operation or shut down.
DC Bus Voltage Protection
P1
Display shows P1 and unit stops, often on portable models.
High Condensate Level / Water Pump Protection
P2
Display shows P2, unit may stop cooling and indicate full tank.
Secondary Water Level / Safety Overflow Protection
Symptom
Air conditioner runs but does not cool the room effectively; air from vents is only slightly cool.
Reduced Cooling Capacity
Symptom
Display shows correct temperature but room feels much warmer or cooler than indicated.
Inaccurate Temperature Sensing
Symptom
Indoor unit makes loud rattling, buzzing, or grinding noises during operation.
Excessive Operational Noise
Symptom
Outdoor unit vibrates excessively or makes banging noises, especially at compressor start-up.
Outdoor Vibration / Mechanical Noise
Symptom
Portable unit shows hose connected but hot air leaks into the room around the window kit.
Poor Exhaust Sealing (Portable AC)
Symptom
Remote control does not operate the unit, but front panel buttons work.
Remote Control / IR Receiver Failure
Symptom
Unit blows warm air in cooling mode or cold air in heating mode intermittently.
Mode Reversal / Reversing Valve Malfunction
Symptom
Unit displays lights or symbols but buttons on the front panel do not respond.
Keypad / Control Panel Failure
Symptom
Unit does not power on at all; display is blank and no response from buttons or remote.
No Power / Dead Unit
Symptom
Unit frequently turns on and off (short cycling) within a few minutes, without reaching set temperature.
Short Cycling
Symptom
Unit powers on but compressor never starts; only fan runs and room does not cool.
Compressor Not Starting
Symptom
Unit runs in heating mode but provides insufficient heat, especially in cold weather.
Reduced Heating Capacity
Symptom
Unit trips the household circuit breaker when starting or during operation.
Electrical Overload / Short Circuit
Symptom
Unit turns off by itself after some time and will not restart until power is cycled.
Thermal Overload / Overheating Shutdown
Symptom
Unpleasant musty or moldy smell from the indoor unit when it starts.
Microbial Growth on Evaporator and Drain Pan
Symptom
Water leaking from the front or sides of the indoor unit or from the body of a portable unit onto the floor.
Condensate Leakage
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E0 |
Unit will not respond to remote control, front panel may still work, display shows E0.
|
Communication Error Between Main PCB and Display/IR Board | View Details |
| E1 |
Unit stops cooling and displays E1, fan may still run.
|
Room (Ambient) Temperature Sensor Fault | View Details |
| E2 |
Unit stops cooling or heating and displays E2, compressor may not start.
|
Evaporator Coil Temperature Sensor Fault | View Details |
| E3 |
Unit displays E3 and stops cooling, outdoor or rear section may shut down.
|
Condenser Coil Temperature Sensor Fault | View Details |
| E4 |
Unit shows E4 and stops, often after running for some time; may be associated with defrost or overheat protection.
|
Evaporator Overheat / Defrost Protection Error | View Details |
| E5 |
Unit displays E5 and compressor does not start or stops shortly after starting.
|
Overcurrent / Compressor Protection Error | View Details |
| E6 |
Unit shows E6, may not respond correctly to mode changes, sometimes associated with indoor–outdoor communication on split systems.
|
Communication Error Between Indoor and Outdoor Units | View Details |
| E7 |
Unit displays E7 and may not start compressor or fan correctly.
|
Mode Conflict / Reversing Valve or Control Logic Error | View Details |
| E8 |
Unit shows E8 and shuts down, often after running at high fan speed or in very hot conditions.
|
Overload / High Temperature Protection | View Details |
| E9 |
Unit displays E9 and stops, often accompanied by water leakage or full tank indicator on portable models.
|
Full Condensate Tank / Water Level Sensor Error | View Details |
| EC |
Display shows EC, unit may run briefly then stop cooling.
|
Refrigerant Leak / Low Pressure Protection | View Details |
| F0 |
Display shows F0 and unit may not cool properly.
|
Low Refrigerant / System Undercharge Indication | View Details |
| F1 |
Display shows F1, unit may run fan only or stop cooling.
|
Indoor Fan Motor Feedback / Hall Sensor Error | View Details |
| F2 |
Display shows F2, unit may shut down or run erratically.
|
Outdoor Fan Motor Error (Split or Dual-Fan Models) | View Details |
| F3 |
Display shows F3, unit may stop heating or cooling correctly.
|
Outdoor Ambient Temperature Sensor Fault | View Details |
| F4 |
Display shows F4, unit may not start compressor or may shut down quickly.
|
Discharge Pipe Temperature Sensor Fault | View Details |
| F5 |
Display shows F5, unit may not defrost properly or may shut down in heating mode.
|
Outdoor Coil Temperature Sensor Fault | View Details |
| H1 |
Display shows H1, unit runs in heating mode but indoor fan may stop or slow down.
|
Defrost / Preheat Protection Mode Indication | View Details |
| H3 |
Display shows H3 and unit shuts down, often in high load conditions.
|
Compressor Overload Protection | View Details |
| H4 |
Display shows H4, unit may not start compressor.
|
Inverter Module / Compressor Drive Protection | View Details |
| H5 |
Display shows H5, unit may not operate or may shut down shortly after starting.
|
IPM (Intelligent Power Module) Protection | View Details |
| P0 |
Display shows P0, unit may limit operation or shut down.
|
DC Bus Voltage Protection | View Details |
| P1 |
Display shows P1 and unit stops, often on portable models.
|
High Condensate Level / Water Pump Protection | View Details |
| P2 |
Display shows P2, unit may stop cooling and indicate full tank.
|
Secondary Water Level / Safety Overflow Protection | View Details |
| – |
Air conditioner runs but does not cool the room effectively; air from vents is only slightly cool.
|
Reduced Cooling Capacity | View Details |
| – |
Display shows correct temperature but room feels much warmer or cooler than indicated.
|
Inaccurate Temperature Sensing | View Details |
| – |
Indoor unit makes loud rattling, buzzing, or grinding noises during operation.
|
Excessive Operational Noise | View Details |
| – |
Outdoor unit vibrates excessively or makes banging noises, especially at compressor start-up.
|
Outdoor Vibration / Mechanical Noise | View Details |
| – |
Portable unit shows hose connected but hot air leaks into the room around the window kit.
|
Poor Exhaust Sealing (Portable AC) | View Details |
| – |
Remote control does not operate the unit, but front panel buttons work.
|
Remote Control / IR Receiver Failure | View Details |
| – |
Unit blows warm air in cooling mode or cold air in heating mode intermittently.
|
Mode Reversal / Reversing Valve Malfunction | View Details |
| – |
Unit displays lights or symbols but buttons on the front panel do not respond.
|
Keypad / Control Panel Failure | View Details |
| – |
Unit does not power on at all; display is blank and no response from buttons or remote.
|
No Power / Dead Unit | View Details |
| – |
Unit frequently turns on and off (short cycling) within a few minutes, without reaching set temperature.
|
Short Cycling | View Details |
| – |
Unit powers on but compressor never starts; only fan runs and room does not cool.
|
Compressor Not Starting | View Details |
| – |
Unit runs in heating mode but provides insufficient heat, especially in cold weather.
|
Reduced Heating Capacity | View Details |
| – |
Unit trips the household circuit breaker when starting or during operation.
|
Electrical Overload / Short Circuit | View Details |
| – |
Unit turns off by itself after some time and will not restart until power is cycled.
|
Thermal Overload / Overheating Shutdown | View Details |
| – |
Unpleasant musty or moldy smell from the indoor unit when it starts.
|
Microbial Growth on Evaporator and Drain Pan | View Details |
| – |
Water leaking from the front or sides of the indoor unit or from the body of a portable unit onto the floor.
|
Condensate Leakage | View Details |
No matching codes found
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