Toshiba 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
Outdoor unit does not start; indoor unit runs in fan mode only and displays E02.
Outdoor Unit Power Supply / Protection Trip
E03
Indoor unit stops shortly after starting; E03 appears on the display.
Indoor Fan Motor Lock / Overload
E04
Unit stops cooling and displays E04; may occur after long operation.
Indoor Coil (Evaporator) Temperature Sensor Fault
E05
Unit stops and displays E05; may occur at startup or during operation.
Room Air Temperature Sensor Fault
E06
Outdoor unit stops; E06 displayed; may be associated with compressor not running.
Outdoor Coil (Condenser) Temperature Sensor Fault
E07
Unit stops with E07; often occurs in heating mode on heat pump models.
Discharge Pipe Temperature Sensor Fault
E08
Unit stops and displays E08; may be accompanied by compressor not starting.
Compressor Overload / High Discharge Temperature Protection
E09
Unit displays E09 and stops; often associated with abnormal indoor fan behavior.
Indoor Fan Motor Feedback / Hall Sensor Error
E10
Unit does not respond to remote; E10 may flash on some Toshiba models.
Indoor Unit EEPROM / Configuration Error
E11
Unit shows E11 and stops; may be related to swing louver not moving.
Horizontal/Vertical Louver Motor Fault
E12
Unit displays E12; may be associated with abnormal indoor coil frost or overheating.
Indoor Heat Exchanger Overheat / Freeze Protection Error
E13
Unit stops with E13; often occurs in heating mode on multi-split Toshiba systems.
Four-Way Reversing Valve Fault / Position Error
E14
Unit shows E14; compressor does not start or stops quickly.
Compressor Start Failure / Inverter Module Error
E15
Unit displays E15; may be associated with abnormal indoor humidity or coil temperature readings.
Indoor Humidity / Auxiliary Sensor Error (model-dependent)
E18
Unit shows E18; outdoor fan may not run or runs erratically.
Outdoor Fan Motor Error
E20
Unit displays E20; may be associated with abnormal indoor unit power or fuse issues.
Indoor Unit Power Supply Error
E21
Unit shows E21; often related to drain pump-equipped Toshiba cassette or ducted units.
Drain Pump Fault / Float Switch Error
E22
Unit displays E22; may be associated with abnormal indoor fan speed feedback.
Indoor Fan Speed Out of Range
E23
Unit shows E23; often related to communication issues in multi-split Toshiba systems.
Indoor–Indoor or Indoor–Central Controller Communication Error
E25
Unit displays E25; may be associated with abnormal outdoor ambient temperature readings.
Outdoor Ambient Temperature Sensor Fault
E30
Unit shows E30; may be associated with abnormal refrigerant pressure readings on inverter models.
Refrigerant Pressure Sensor Error
E32
Unit displays E32; may be associated with abnormal DC bus voltage on inverter models.
DC Overvoltage / Undervoltage Protection
E40
Unit shows E40; often related to indoor unit communication or address conflict on VRF/VRV-type Toshiba systems.
Indoor Address Conflict / Duplicate Address
F01
Unit displays F01; often associated with indoor unit freeze protection activation.
Indoor Coil Freeze Protection Activated
F02
Unit shows F02; often associated with high-pressure protection on outdoor unit.
High-Pressure Protection Activated
F03
Unit displays F03; may be associated with low-pressure protection on outdoor unit.
Low-Pressure Protection Activated
F04
Unit shows F04; often associated with compressor overcurrent on inverter models.
Compressor Overcurrent Protection
F05
Unit displays F05; may be associated with defrost control issues in heating mode.
Defrost Control Error
Symptom
Indoor unit blows warm air in cooling mode or cold air in heating mode intermittently.
Reversing Valve or Mode Control Issue
Symptom
Indoor unit does not power on at all; no lights or display.
No Power to Indoor Unit
Symptom
Indoor unit emits a musty or moldy smell when starting.
Microbial Growth on Indoor Coil and Drain Pan
Symptom
Indoor unit louvers do not move or are stuck in one position.
Louver Mechanism Failure
Symptom
Indoor unit makes loud rattling or buzzing noises during operation.
Indoor Mechanical Noise / Vibration
Symptom
Indoor unit runs but no cooling; air from vents is room temperature or only slightly cooler.
Loss of Cooling Capacity / Refrigerant Undercharge
Symptom
Outdoor unit makes loud grinding, squealing, or rattling noises.
Outdoor Mechanical Noise / Fan or Compressor Issue
Symptom
Outdoor unit not running while indoor unit blows air; no error code displayed.
Outdoor Unit Non-Operation Without Error
Symptom
Remote control does not operate the Toshiba air conditioner.
Remote Control Communication Failure
Symptom
Unit displays timer light blinking but no specific error code; operation stops intermittently.
General Protection Trip Without Displayed Code
Symptom
Unit emits clicking or popping sounds from indoor unit during operation.
Thermal Expansion Noise / Plastic Casing Movement
Symptom
Unit frequently turns on and off (short cycling) without reaching set temperature.
Short Cycling / Improper Capacity or Control
Symptom
Unit runs but room does not reach set temperature; performance is poor in both cooling and heating.
General Capacity Loss / System Inefficiency
Symptom
Unit trips the circuit breaker when starting or during operation.
Electrical Overload / Short Circuit
Symptom
Water dripping from the front of the indoor unit or down the wall.
Indoor Unit Water Leakage
Symptom
Water leaking from outdoor unit during heating mode (heat pump).
Normal Defrost Water Discharge or Abnormal Outdoor Drainage
| 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 |
Outdoor unit does not start; indoor unit runs in fan mode only and displays E02.
|
Outdoor Unit Power Supply / Protection Trip | View Details |
| E03 |
Indoor unit stops shortly after starting; E03 appears on the display.
|
Indoor Fan Motor Lock / Overload | View Details |
| E04 |
Unit stops cooling and displays E04; may occur after long operation.
|
Indoor Coil (Evaporator) Temperature Sensor Fault | View Details |
| E05 |
Unit stops and displays E05; may occur at startup or during operation.
|
Room Air Temperature Sensor Fault | View Details |
| E06 |
Outdoor unit stops; E06 displayed; may be associated with compressor not running.
|
Outdoor Coil (Condenser) Temperature Sensor Fault | View Details |
| E07 |
Unit stops with E07; often occurs in heating mode on heat pump models.
|
Discharge Pipe Temperature Sensor Fault | View Details |
| E08 |
Unit stops and displays E08; may be accompanied by compressor not starting.
|
Compressor Overload / High Discharge Temperature Protection | View Details |
| E09 |
Unit displays E09 and stops; often associated with abnormal indoor fan behavior.
|
Indoor Fan Motor Feedback / Hall Sensor Error | View Details |
| E10 |
Unit does not respond to remote; E10 may flash on some Toshiba models.
|
Indoor Unit EEPROM / Configuration Error | View Details |
| E11 |
Unit shows E11 and stops; may be related to swing louver not moving.
|
Horizontal/Vertical Louver Motor Fault | View Details |
| E12 |
Unit displays E12; may be associated with abnormal indoor coil frost or overheating.
|
Indoor Heat Exchanger Overheat / Freeze Protection Error | View Details |
| E13 |
Unit stops with E13; often occurs in heating mode on multi-split Toshiba systems.
|
Four-Way Reversing Valve Fault / Position Error | View Details |
| E14 |
Unit shows E14; compressor does not start or stops quickly.
|
Compressor Start Failure / Inverter Module Error | View Details |
| E15 |
Unit displays E15; may be associated with abnormal indoor humidity or coil temperature readings.
|
Indoor Humidity / Auxiliary Sensor Error (model-dependent) | View Details |
| E18 |
Unit shows E18; outdoor fan may not run or runs erratically.
|
Outdoor Fan Motor Error | View Details |
| E20 |
Unit displays E20; may be associated with abnormal indoor unit power or fuse issues.
|
Indoor Unit Power Supply Error | View Details |
| E21 |
Unit shows E21; often related to drain pump-equipped Toshiba cassette or ducted units.
|
Drain Pump Fault / Float Switch Error | View Details |
| E22 |
Unit displays E22; may be associated with abnormal indoor fan speed feedback.
|
Indoor Fan Speed Out of Range | View Details |
| E23 |
Unit shows E23; often related to communication issues in multi-split Toshiba systems.
|
Indoor–Indoor or Indoor–Central Controller Communication Error | View Details |
| E25 |
Unit displays E25; may be associated with abnormal outdoor ambient temperature readings.
|
Outdoor Ambient Temperature Sensor Fault | View Details |
| E30 |
Unit shows E30; may be associated with abnormal refrigerant pressure readings on inverter models.
|
Refrigerant Pressure Sensor Error | View Details |
| E32 |
Unit displays E32; may be associated with abnormal DC bus voltage on inverter models.
|
DC Overvoltage / Undervoltage Protection | View Details |
| E40 |
Unit shows E40; often related to indoor unit communication or address conflict on VRF/VRV-type Toshiba systems.
|
Indoor Address Conflict / Duplicate Address | View Details |
| F01 |
Unit displays F01; often associated with indoor unit freeze protection activation.
|
Indoor Coil Freeze Protection Activated | View Details |
| F02 |
Unit shows F02; often associated with high-pressure protection on outdoor unit.
|
High-Pressure Protection Activated | View Details |
| F03 |
Unit displays F03; may be associated with low-pressure protection on outdoor unit.
|
Low-Pressure Protection Activated | View Details |
| F04 |
Unit shows F04; often associated with compressor overcurrent on inverter models.
|
Compressor Overcurrent Protection | View Details |
| F05 |
Unit displays F05; may be associated with defrost control issues in heating mode.
|
Defrost Control Error | View Details |
| – |
Indoor unit blows warm air in cooling mode or cold air in heating mode intermittently.
|
Reversing Valve or Mode Control Issue | View Details |
| – |
Indoor unit does not power on at all; no lights or display.
|
No Power to Indoor Unit | View Details |
| – |
Indoor unit emits a musty or moldy smell when starting.
|
Microbial Growth on Indoor Coil and Drain Pan | View Details |
| – |
Indoor unit louvers do not move or are stuck in one position.
|
Louver Mechanism Failure | View Details |
| – |
Indoor unit makes loud rattling or buzzing noises during operation.
|
Indoor Mechanical Noise / Vibration | View Details |
| – |
Indoor unit runs but no cooling; air from vents is room temperature or only slightly cooler.
|
Loss of Cooling Capacity / Refrigerant Undercharge | View Details |
| – |
Outdoor unit makes loud grinding, squealing, or rattling noises.
|
Outdoor Mechanical Noise / Fan or Compressor Issue | View Details |
| – |
Outdoor unit not running while indoor unit blows air; no error code displayed.
|
Outdoor Unit Non-Operation Without Error | View Details |
| – |
Remote control does not operate the Toshiba air conditioner.
|
Remote Control Communication Failure | View Details |
| – |
Unit displays timer light blinking but no specific error code; operation stops intermittently.
|
General Protection Trip Without Displayed Code | View Details |
| – |
Unit emits clicking or popping sounds from indoor unit during operation.
|
Thermal Expansion Noise / Plastic Casing Movement | View Details |
| – |
Unit frequently turns on and off (short cycling) without reaching set temperature.
|
Short Cycling / Improper Capacity or Control | View Details |
| – |
Unit runs but room does not reach set temperature; performance is poor in both cooling and heating.
|
General Capacity Loss / System Inefficiency | View Details |
| – |
Unit trips the circuit breaker when starting or during operation.
|
Electrical Overload / Short Circuit | View Details |
| – |
Water dripping from the front of the indoor unit or down the wall.
|
Indoor Unit Water Leakage | View Details |
| – |
Water leaking from outdoor unit during heating mode (heat pump).
|
Normal Defrost Water Discharge or Abnormal Outdoor Drainage | View Details |
No matching codes found
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