Baxi 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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E01
Indoor unit will not start; display shows E01 shortly after power-on
Indoor–Outdoor Communication Failure
E02
Indoor unit stops shortly after starting; display shows E02
Indoor Room Temperature Sensor (NTC) Fault
E03
Unit runs briefly then stops; display shows E03 and indoor fan may stop
Indoor Coil (Evaporator) Temperature Sensor Fault
E04
Outdoor unit does not start; indoor unit shows E04 and cooling/heating is unavailable
Outdoor Coil Temperature Sensor Fault
E05
Unit stops with E05; often occurs in heating mode on Baxi heat pump air conditioners
Outdoor Discharge (Compressor) Temperature Sensor Fault
E06
Indoor unit shows E06; compressor does not start or stops quickly
Compressor Overload / High Discharge Temperature Protection
E07
Indoor unit shows E07; unit may not respond to remote commands
Indoor Fan Motor Fault (DC Inverter Type)
E08
Unit displays E08 and stops; often associated with power-up or compressor start
Overcurrent / DC Bus Overload Protection
E09
Indoor unit shows E09; louver may not move or fan may not start correctly
Indoor Fan Motor Feedback / Hall Sensor Error
E10
Unit does not cool or heat; E10 displayed; compressor does not run.
Compressor Start Failure / Phase Loss (for some multi-split or 3-phase models)
E11
Indoor unit shows E11; unit may run briefly then stop, often in heating mode.
Indoor-Outdoor Mismatch / Addressing Error (Multi-split systems)
E12
Indoor unit shows E12; louver does not move or stops mid-position.
Horizontal/Vertical Louver Motor Fault
E13
Indoor unit shows E13; unit may stop in heating mode with the outdoor unit still running briefly.
Defrost Sensor / Defrost Protection Error
E14
Indoor unit shows E14; unit may not start or stops randomly.
Indoor EEPROM / Memory Error
E15
Indoor unit shows E15; unit may not respond to the remote or may shut down unexpectedly.
Indoor Power Supply / Low Voltage Error
E16
Indoor unit shows E16; the outdoor fan may not run or runs erratically.
Outdoor Fan Motor Fault
E17
Indoor unit shows E17; unit may stop with no cooling or heating.
High Pressure Protection
E18
Indoor unit shows E18; unit may stop with poor cooling and frost on the indoor coil.
Low Pressure / Refrigerant Undercharge Protection
E19
Indoor unit shows E19; unit may not start in heating mode.
Four-Way Reversing Valve Fault
E20
Indoor unit shows E20; condensate water may overflow, or the unit may shut down in cooling mode.
Drain Pump / Float Switch Fault (for units with a built-in pump)
E21
Indoor unit shows E21; the unit may not respond to the remote control.
Indoor Remote Receiver / PCB Communication Error
E22
Indoor unit shows E22; the unit may operate but with limited control or an incorrect display.
Indoor Display Panel Fault
E23
Indoor unit shows E23; the unit may not start the compressor.
Outdoor Ambient Temperature Sensor Fault
E24
Indoor unit shows E24; the unit may stop after running for some time.
Indoor Coil Freeze Protection / Low Evaporator Temperature
E25
Indoor unit shows E25; the unit may not start or may shut down quickly.
Outdoor PCB Overheat / Heat Sink Temperature Error
E26
Indoor unit shows E26; the unit may not start in certain modes.
Mode Conflict / Protection (e.g., simultaneous heat and cool demand on a multi-split system)
E27
Indoor unit shows E27; the unit may not start or may shut down with no obvious mechanical issue.
Protection Against Frequent Start/Stop (Anti-short-cycle)
Symptom
Baxi air conditioner does not turn on at all; no lights or display.
No Power to Indoor Unit
Symptom
Burning or electrical smell from the indoor or outdoor unit.
Overheating Electrical Component
Symptom
Excessive vibration of the indoor unit; the unit shakes the wall or makes a droning noise.
Indoor Vibration / Mounting Fault
Symptom
Indoor unit makes loud rattling or buzzing noises during operation.
Indoor Mechanical Noise / Loose Components
Symptom
Outdoor unit fan runs, but the compressor does not start; no specific error code is shown.
Compressor Start Failure Without Code
Symptom
Outdoor unit very noisy during operation; rattling or grinding sounds.
Outdoor Mechanical Noise / Fan or Compressor Mounting Fault
Symptom
Remote control does not operate the Baxi air conditioner; the unit can still be controlled from the panel (if available).
Remote Control / IR Receiver Failure
Symptom
Strong musty or moldy smell when the Baxi air conditioner starts.
Biological Contamination of Indoor Coil and Drain Pan
Symptom
The indoor unit displays lights but does not respond to any buttons on the panel.
Keypad / Control Panel Failure
Symptom
The indoor unit fan does not run, but the compressor and outdoor fan operate; the coil may freeze.
Indoor Fan Failure Without Error Code
Symptom
The unit runs but trips the circuit breaker intermittently.
Overcurrent / Electrical Overload Without Code
Symptom
The unit turns on but does not cool; the fan runs but the air is not cold in cooling mode.
Loss of Cooling Capacity
Symptom
Unit does not heat in HEAT mode; blows cool air even after several minutes.
Loss of Heating Capacity (Heat Pump Mode)
Symptom
Unit frequently turns on and off (short cycling) without maintaining temperature.
Short Cycling / Control or Sizing Issue
Symptom
Water leaking from the indoor unit's front panel or dripping onto the wall/floor.
Indoor Condensate Drainage Failure
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Indoor unit will not start; display shows E01 shortly after power-on
|
Indoor–Outdoor Communication Failure | View Details |
| E02 |
Indoor unit stops shortly after starting; display shows E02
|
Indoor Room Temperature Sensor (NTC) Fault | View Details |
| E03 |
Unit runs briefly then stops; display shows E03 and indoor fan may stop
|
Indoor Coil (Evaporator) Temperature Sensor Fault | View Details |
| E04 |
Outdoor unit does not start; indoor unit shows E04 and cooling/heating is unavailable
|
Outdoor Coil Temperature Sensor Fault | View Details |
| E05 |
Unit stops with E05; often occurs in heating mode on Baxi heat pump air conditioners
|
Outdoor Discharge (Compressor) Temperature Sensor Fault | View Details |
| E06 |
Indoor unit shows E06; compressor does not start or stops quickly
|
Compressor Overload / High Discharge Temperature Protection | View Details |
| E07 |
Indoor unit shows E07; unit may not respond to remote commands
|
Indoor Fan Motor Fault (DC Inverter Type) | View Details |
| E08 |
Unit displays E08 and stops; often associated with power-up or compressor start
|
Overcurrent / DC Bus Overload Protection | View Details |
| E09 |
Indoor unit shows E09; louver may not move or fan may not start correctly
|
Indoor Fan Motor Feedback / Hall Sensor Error | View Details |
| E10 |
Unit does not cool or heat; E10 displayed; compressor does not run.
|
Compressor Start Failure / Phase Loss (for some multi-split or 3-phase models) | View Details |
| E11 |
Indoor unit shows E11; unit may run briefly then stop, often in heating mode.
|
Indoor-Outdoor Mismatch / Addressing Error (Multi-split systems) | View Details |
| E12 |
Indoor unit shows E12; louver does not move or stops mid-position.
|
Horizontal/Vertical Louver Motor Fault | View Details |
| E13 |
Indoor unit shows E13; unit may stop in heating mode with the outdoor unit still running briefly.
|
Defrost Sensor / Defrost Protection Error | View Details |
| E14 |
Indoor unit shows E14; unit may not start or stops randomly.
|
Indoor EEPROM / Memory Error | View Details |
| E15 |
Indoor unit shows E15; unit may not respond to the remote or may shut down unexpectedly.
|
Indoor Power Supply / Low Voltage Error | View Details |
| E16 |
Indoor unit shows E16; the outdoor fan may not run or runs erratically.
|
Outdoor Fan Motor Fault | View Details |
| E17 |
Indoor unit shows E17; unit may stop with no cooling or heating.
|
High Pressure Protection | View Details |
| E18 |
Indoor unit shows E18; unit may stop with poor cooling and frost on the indoor coil.
|
Low Pressure / Refrigerant Undercharge Protection | View Details |
| E19 |
Indoor unit shows E19; unit may not start in heating mode.
|
Four-Way Reversing Valve Fault | View Details |
| E20 |
Indoor unit shows E20; condensate water may overflow, or the unit may shut down in cooling mode.
|
Drain Pump / Float Switch Fault (for units with a built-in pump) | View Details |
| E21 |
Indoor unit shows E21; the unit may not respond to the remote control.
|
Indoor Remote Receiver / PCB Communication Error | View Details |
| E22 |
Indoor unit shows E22; the unit may operate but with limited control or an incorrect display.
|
Indoor Display Panel Fault | View Details |
| E23 |
Indoor unit shows E23; the unit may not start the compressor.
|
Outdoor Ambient Temperature Sensor Fault | View Details |
| E24 |
Indoor unit shows E24; the unit may stop after running for some time.
|
Indoor Coil Freeze Protection / Low Evaporator Temperature | View Details |
| E25 |
Indoor unit shows E25; the unit may not start or may shut down quickly.
|
Outdoor PCB Overheat / Heat Sink Temperature Error | View Details |
| E26 |
Indoor unit shows E26; the unit may not start in certain modes.
|
Mode Conflict / Protection (e.g., simultaneous heat and cool demand on a multi-split system) | View Details |
| E27 |
Indoor unit shows E27; the unit may not start or may shut down with no obvious mechanical issue.
|
Protection Against Frequent Start/Stop (Anti-short-cycle) | View Details |
| – |
Baxi air conditioner does not turn on at all; no lights or display.
|
No Power to Indoor Unit | View Details |
| – |
Burning or electrical smell from the indoor or outdoor unit.
|
Overheating Electrical Component | View Details |
| – |
Excessive vibration of the indoor unit; the unit shakes the wall or makes a droning noise.
|
Indoor Vibration / Mounting Fault | View Details |
| – |
Indoor unit makes loud rattling or buzzing noises during operation.
|
Indoor Mechanical Noise / Loose Components | View Details |
| – |
Outdoor unit fan runs, but the compressor does not start; no specific error code is shown.
|
Compressor Start Failure Without Code | View Details |
| – |
Outdoor unit very noisy during operation; rattling or grinding sounds.
|
Outdoor Mechanical Noise / Fan or Compressor Mounting Fault | View Details |
| – |
Remote control does not operate the Baxi air conditioner; the unit can still be controlled from the panel (if available).
|
Remote Control / IR Receiver Failure | View Details |
| – |
Strong musty or moldy smell when the Baxi air conditioner starts.
|
Biological Contamination of Indoor Coil and Drain Pan | View Details |
| – |
The indoor unit displays lights but does not respond to any buttons on the panel.
|
Keypad / Control Panel Failure | View Details |
| – |
The indoor unit fan does not run, but the compressor and outdoor fan operate; the coil may freeze.
|
Indoor Fan Failure Without Error Code | View Details |
| – |
The unit runs but trips the circuit breaker intermittently.
|
Overcurrent / Electrical Overload Without Code | View Details |
| – |
The unit turns on but does not cool; the fan runs but the air is not cold in cooling mode.
|
Loss of Cooling Capacity | View Details |
| – |
Unit does not heat in HEAT mode; blows cool air even after several minutes.
|
Loss of Heating Capacity (Heat Pump Mode) | View Details |
| – |
Unit frequently turns on and off (short cycling) without maintaining temperature.
|
Short Cycling / Control or Sizing Issue | View Details |
| – |
Water leaking from the indoor unit's front panel or dripping onto the wall/floor.
|
Indoor Condensate Drainage Failure | View Details |
No matching codes found
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