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 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 remote or may shut down unexpectedly
Indoor Power Supply / Low Voltage Error
E16
Indoor unit shows E16; 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 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 unit may shut down in cooling mode
Drain Pump / Float Switch Fault (for units with built-in pump)
E21
Indoor unit shows E21; unit may not respond to remote control
Indoor Remote Receiver / PCB Communication Error
E22
Indoor unit shows E22; unit may operate but with limited control or incorrect display
Indoor Display Panel Fault
E23
Indoor unit shows E23; unit may not start compressor
Outdoor Ambient Temperature Sensor Fault
E24
Indoor unit shows E24; unit may stop after running for some time
Indoor Coil Freeze Protection / Low Evaporator Temperature
E25
Indoor unit shows E25; unit may not start or may shut down quickly
Outdoor PCB Overheat / Heat Sink Temperature Error
E26
Indoor unit shows E26; unit may not start in certain modes
Mode Conflict / Protection (e.g., simultaneous heat and cool demand on multi-split)
E27
Indoor unit shows E27; 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 indoor or outdoor unit
Overheating Electrical Component
Symptom
Excessive vibration of indoor unit; unit shakes wall or makes droning noise
Indoor Vibration / Mounting Fault
Symptom
Indoor unit displays lights but does not respond to any buttons on the panel
Keypad / Control Panel Failure
Symptom
Indoor unit fan does not run, but compressor and outdoor fan operate; coil may freeze
Indoor Fan Failure Without Error Code
Symptom
Indoor unit makes loud rattling or buzzing noises during operation
Indoor Mechanical Noise / Loose Components
Symptom
Outdoor unit fan runs but compressor does not start; no specific error code 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; unit can still be controlled from 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
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
Unit runs but trips the circuit breaker intermittently
Overcurrent / Electrical Overload Without Code
Symptom
Unit turns on but does not cool; fan runs but air is not cold in cooling mode
Loss of Cooling Capacity
Symptom
Water leaking from indoor unit front panel or dripping onto 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 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 remote or may shut down unexpectedly
|
Indoor Power Supply / Low Voltage Error | View Details |
| E16 |
Indoor unit shows E16; 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 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 unit may shut down in cooling mode
|
Drain Pump / Float Switch Fault (for units with built-in pump) | View Details |
| E21 |
Indoor unit shows E21; unit may not respond to remote control
|
Indoor Remote Receiver / PCB Communication Error | View Details |
| E22 |
Indoor unit shows E22; unit may operate but with limited control or incorrect display
|
Indoor Display Panel Fault | View Details |
| E23 |
Indoor unit shows E23; unit may not start compressor
|
Outdoor Ambient Temperature Sensor Fault | View Details |
| E24 |
Indoor unit shows E24; unit may stop after running for some time
|
Indoor Coil Freeze Protection / Low Evaporator Temperature | View Details |
| E25 |
Indoor unit shows E25; unit may not start or may shut down quickly
|
Outdoor PCB Overheat / Heat Sink Temperature Error | View Details |
| E26 |
Indoor unit shows E26; unit may not start in certain modes
|
Mode Conflict / Protection (e.g., simultaneous heat and cool demand on multi-split) | View Details |
| E27 |
Indoor unit shows E27; 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 indoor or outdoor unit
|
Overheating Electrical Component | View Details |
| – |
Excessive vibration of indoor unit; unit shakes wall or makes droning noise
|
Indoor Vibration / Mounting Fault | View Details |
| – |
Indoor unit displays lights but does not respond to any buttons on the panel
|
Keypad / Control Panel Failure | View Details |
| – |
Indoor unit fan does not run, but compressor and outdoor fan operate; coil may freeze
|
Indoor Fan Failure Without Error Code | View Details |
| – |
Indoor unit makes loud rattling or buzzing noises during operation
|
Indoor Mechanical Noise / Loose Components | View Details |
| – |
Outdoor unit fan runs but compressor does not start; no specific error code 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; unit can still be controlled from 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 |
| – |
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 |
| – |
Unit runs but trips the circuit breaker intermittently
|
Overcurrent / Electrical Overload Without Code | View Details |
| – |
Unit turns on but does not cool; fan runs but air is not cold in cooling mode
|
Loss of Cooling Capacity | View Details |
| – |
Water leaking from indoor unit front panel or dripping onto wall/floor
|
Indoor Condensate Drainage Failure | View Details |
No matching codes found
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