Klarstein
Klarstein 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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CF
The display shows CF after a period of operation; the unit still works but prompts maintenance.
Filter Cleaning Reminder
E0
The display shows E0, and the unit may not respond to some commands.
Keypad/Control Panel Communication Error
E1
Unit will not start cooling; the display shows E1 shortly after power-on.
Room Temperature Sensor (NTC) Fault
E2
Klarstein air conditioner stops cooling and displays E2 on the control panel.
Evaporator Coil Temperature Sensor Fault
E3
Unit runs briefly then stops and shows E3 on the display.
Condenser Coil Temperature Sensor Fault
E4
Klarstein portable AC stops and displays E4; sometimes accompanied by water tank full indicator.
Full Condensate Tank / Overflow Protection
E5
Unit stops cooling and shows E5; compressor does not start or shuts down quickly.
Compressor Overload / High Current Protection
E6
Display shows E6 and the indoor fan may not run or runs erratically.
Indoor Fan Motor / Fan Feedback Error
E7
Klarstein split AC shows E7 and outdoor unit does not start or respond.
Communication Error Between Indoor and Outdoor Units
E7H
On some Klarstein models, E7H appears, and heating or cooling stops.
Four-Way Valve/Reversing Valve Error (Heat Pump Models)
E8
Unit shuts down and displays E8, often during very hot operation.
High-Temperature Protection / Overheating
E9
Display shows E9 and unit may not respond to mode changes or remote commands.
EEPROM / Memory Error on Main Control PCB
EC
Klarstein AC shows EC and stops cooling; it may attempt to restart and fail.
Refrigerant System / Low Refrigerant Protection
F1
Klarstein AC displays F1 and may not cool correctly; fan may still run.
Indoor Ambient Sensor Error (Alternate Code)
F2
Display shows F2 and cooling stops; defrost or protection mode may activate.
Evaporator Low-Temperature / Frost Sensor Error
F3
Klarstein split or portable AC shows F3 and may shut down the compressor.
Condenser High-Temperature Sensor Error
F4
The display shows F4; the outdoor fan may not run or runs intermittently.
Outdoor Fan Motor Error
F5
Klarstein AC shows F5 and may stop cooling or heating (for heat pump models).
Outdoor Ambient Temperature Sensor Error
H1
The display shows H1 and the unit does not cool; it may run the fan only for a period.
Defrost Mode Active (Information Code)
H3
Klarstein AC stops with H3 code; the compressor does not restart.
Compressor Overload Protection / Overcurrent
H5
The display shows H5 and the unit may not start or may shut down shortly after starting.
IPM / Inverter Module Protection (Inverter Models)
P1
Portable Klarstein AC shows P1 and stops cooling; the water full icon may be lit.
Bottom Tray Full / Condensate High-Level Protection
P2
Portable AC shows P2 and stops cooling intermittently.
Upper Water Tank Full (Some Dual-Tank Models)
Symptom
High-pitched squealing or screeching noise from the indoor unit when the fan is running.
Fan Motor Bearing Wear
Symptom
Klarstein air conditioner blows warm air in cooling mode.
Cooling Mode Failure / Reversing Valve or Refrigerant Issue
Symptom
Klarstein air conditioner display and lights flicker or dim when the compressor starts.
Voltage Drop / Inrush Current Issue
Symptom
Klarstein air conditioner indoor unit freezes up; ice forms on the evaporator coil.
Evaporator Icing / Low Airflow or Refrigerant Issue
Symptom
Klarstein air conditioner outdoor unit runs, but the indoor fan does not blow air.
Indoor Fan Failure
Symptom
Klarstein air conditioner trips the household circuit breaker or RCD when starting or during operation.
Electrical Overload or Ground Fault
Symptom
Klarstein portable air conditioner exhaust hose becomes very hot, and the room does not cool well.
Improper Exhaust / Recirculation of Hot Air
Symptom
Loud rattling or buzzing noise from the Klarstein air conditioner during operation.
Mechanical Vibration/Loose Components
Symptom
Remote control does not operate Klarstein air conditioner; the unit works from panel buttons.
Remote Control / IR Receiver Failure
Symptom
The Klarstein air conditioner emits a musty or moldy smell when first turned on.
Biological Growth on Evaporator and Drain System
Symptom
The Klarstein air conditioner frequently turns on and off (short cycling) without reaching the set temperature.
Short Cycling/Control Instability
Symptom
The Klarstein air conditioner leaks water onto the floor from the front or rear of the unit.
Water Leakage/Condensate Drain Blockage
Symptom
The Klarstein air conditioner powers on, but the compressor never starts; only the fan runs, and no cooling occurs.
Compressor Not Starting
Symptom
The Klarstein air conditioner runs but does not cool the room effectively; air from the vents is only slightly cool or at room temperature.
Insufficient Cooling Capacity/Performance Loss
Symptom
The unit does not power on at all; there are no lights or display on the Klarstein air conditioner.
No Power/Dead Unit
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| CF |
The display shows CF after a period of operation; the unit still works but prompts maintenance.
|
Filter Cleaning Reminder | View Details |
| E0 |
The display shows E0, and the unit may not respond to some commands.
|
Keypad/Control Panel Communication Error | View Details |
| E1 |
Unit will not start cooling; the display shows E1 shortly after power-on.
|
Room Temperature Sensor (NTC) Fault | View Details |
| E2 |
Klarstein air conditioner stops cooling and displays E2 on the control panel.
|
Evaporator Coil Temperature Sensor Fault | View Details |
| E3 |
Unit runs briefly then stops and shows E3 on the display.
|
Condenser Coil Temperature Sensor Fault | View Details |
| E4 |
Klarstein portable AC stops and displays E4; sometimes accompanied by water tank full indicator.
|
Full Condensate Tank / Overflow Protection | View Details |
| E5 |
Unit stops cooling and shows E5; compressor does not start or shuts down quickly.
|
Compressor Overload / High Current Protection | View Details |
| E6 |
Display shows E6 and the indoor fan may not run or runs erratically.
|
Indoor Fan Motor / Fan Feedback Error | View Details |
| E7 |
Klarstein split AC shows E7 and outdoor unit does not start or respond.
|
Communication Error Between Indoor and Outdoor Units | View Details |
| E7H |
On some Klarstein models, E7H appears, and heating or cooling stops.
|
Four-Way Valve/Reversing Valve Error (Heat Pump Models) | View Details |
| E8 |
Unit shuts down and displays E8, often during very hot operation.
|
High-Temperature Protection / Overheating | View Details |
| E9 |
Display shows E9 and unit may not respond to mode changes or remote commands.
|
EEPROM / Memory Error on Main Control PCB | View Details |
| EC |
Klarstein AC shows EC and stops cooling; it may attempt to restart and fail.
|
Refrigerant System / Low Refrigerant Protection | View Details |
| F1 |
Klarstein AC displays F1 and may not cool correctly; fan may still run.
|
Indoor Ambient Sensor Error (Alternate Code) | View Details |
| F2 |
Display shows F2 and cooling stops; defrost or protection mode may activate.
|
Evaporator Low-Temperature / Frost Sensor Error | View Details |
| F3 |
Klarstein split or portable AC shows F3 and may shut down the compressor.
|
Condenser High-Temperature Sensor Error | View Details |
| F4 |
The display shows F4; the outdoor fan may not run or runs intermittently.
|
Outdoor Fan Motor Error | View Details |
| F5 |
Klarstein AC shows F5 and may stop cooling or heating (for heat pump models).
|
Outdoor Ambient Temperature Sensor Error | View Details |
| H1 |
The display shows H1 and the unit does not cool; it may run the fan only for a period.
|
Defrost Mode Active (Information Code) | View Details |
| H3 |
Klarstein AC stops with H3 code; the compressor does not restart.
|
Compressor Overload Protection / Overcurrent | View Details |
| H5 |
The display shows H5 and the unit may not start or may shut down shortly after starting.
|
IPM / Inverter Module Protection (Inverter Models) | View Details |
| P1 |
Portable Klarstein AC shows P1 and stops cooling; the water full icon may be lit.
|
Bottom Tray Full / Condensate High-Level Protection | View Details |
| P2 |
Portable AC shows P2 and stops cooling intermittently.
|
Upper Water Tank Full (Some Dual-Tank Models) | View Details |
| – |
High-pitched squealing or screeching noise from the indoor unit when the fan is running.
|
Fan Motor Bearing Wear | View Details |
| – |
Klarstein air conditioner blows warm air in cooling mode.
|
Cooling Mode Failure / Reversing Valve or Refrigerant Issue | View Details |
| – |
Klarstein air conditioner display and lights flicker or dim when the compressor starts.
|
Voltage Drop / Inrush Current Issue | View Details |
| – |
Klarstein air conditioner indoor unit freezes up; ice forms on the evaporator coil.
|
Evaporator Icing / Low Airflow or Refrigerant Issue | View Details |
| – |
Klarstein air conditioner outdoor unit runs, but the indoor fan does not blow air.
|
Indoor Fan Failure | View Details |
| – |
Klarstein air conditioner trips the household circuit breaker or RCD when starting or during operation.
|
Electrical Overload or Ground Fault | View Details |
| – |
Klarstein portable air conditioner exhaust hose becomes very hot, and the room does not cool well.
|
Improper Exhaust / Recirculation of Hot Air | View Details |
| – |
Loud rattling or buzzing noise from the Klarstein air conditioner during operation.
|
Mechanical Vibration/Loose Components | View Details |
| – |
Remote control does not operate Klarstein air conditioner; the unit works from panel buttons.
|
Remote Control / IR Receiver Failure | View Details |
| – |
The Klarstein air conditioner emits a musty or moldy smell when first turned on.
|
Biological Growth on Evaporator and Drain System | View Details |
| – |
The Klarstein air conditioner frequently turns on and off (short cycling) without reaching the set temperature.
|
Short Cycling/Control Instability | View Details |
| – |
The Klarstein air conditioner leaks water onto the floor from the front or rear of the unit.
|
Water Leakage/Condensate Drain Blockage | View Details |
| – |
The Klarstein air conditioner powers on, but the compressor never starts; only the fan runs, and no cooling occurs.
|
Compressor Not Starting | View Details |
| – |
The Klarstein air conditioner runs but does not cool the room effectively; air from the vents is only slightly cool or at room temperature.
|
Insufficient Cooling Capacity/Performance Loss | View Details |
| – |
The unit does not power on at all; there are no lights or display on the Klarstein air conditioner.
|
No Power/Dead Unit | View Details |
No matching codes found
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