Danby 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
Display shows CF after a certain number of operating hours; unit still runs.
Filter Clean Reminder (Not a Fault)
E1
Unit will not run, display shows E1 shortly after power-up or when trying to change modes.
Room Temperature Sensor (Ambient Thermistor) Fault
E2
Unit stops cooling and displays E2, fan may still run.
Evaporator Coil Temperature Sensor Fault
E3
Display shows E3, compressor does not start or stops shortly after starting.
Condenser Coil Temperature Sensor Fault
E4
Unit stops and displays E4, often after running for some time; may be accompanied by water in the base pan.
Full Water Tank / High-Level Float Switch Activated (Portable Models)
E5
Display shows E5 and the compressor does not start or shuts down quickly.
Compressor Overload / Overcurrent Protection or Voltage Error (Model-Dependent)
E6
Display shows E6, unit may not respond to remote or may not start compressor.
Communication Error Between Display Board and Main PCB (or Indoor/Outdoor Boards on Split Units)
E7
Display shows E7, unit may run fan only or shut down cooling.
Indoor Fan Motor Feedback / Hall Sensor Error (DC Fan Models)
E8
Display shows E8 and unit may shut down or limit operation, sometimes after long runtime in high heat.
High-Temperature Protection / Overload Protection
E9
Display shows E9, unit may not start or may shut down unexpectedly.
EEPROM / Memory Error on Main PCB
F1
Display shows F1, unit may not cool properly or may shut down.
Indoor Ambient Sensor Fault (Alternate Code Set)
F2
Display shows F2, cooling stops or unit cycles off quickly.
Evaporator Sensor Fault (Alternate Code Set)
F3
Display shows F3, unit may shut down under high load or not start compressor.
Condenser Sensor Fault (Alternate Code Set)
F4
Display shows F4, unit may not respond to commands or may shut down unexpectedly.
Indoor Fan Motor Error / Feedback Fault
H1
Display shows H1, unit may run fan only or delay compressor start.
Defrost or Low-Temperature Protection Mode (Heat Pump / Some Cooling Models)
H3
Display shows H3, compressor does not run or shuts down quickly.
Compressor Overload / Overheat Protection
H4
Display shows H4, unit may not cool or may shut down intermittently.
Indoor-Outdoor Communication Fault (Split Systems) or General Protection
HI
Display shows HI and unit may run continuously or shut down on protection.
High Ambient Temperature Indication / Sensor Reading Above Range
LO
Display shows LO and unit may not start cooling; often occurs in very cold rooms.
Low Ambient Temperature Protection / Sensor Reading Below Range
P1
Portable AC stops cooling and displays P1; fan may continue to run.
Bottom Water Tray Full / High-Level Protection (Portable Models)
P2
Portable AC displays P2 and may stop cooling or dehumidifying.
Upper Water Tray Full / Secondary Float Triggered (Some Portable Models)
Symptom
Air conditioner will not turn on at all; no lights or display.
No Power / Dead Unit
Symptom
Burning or electrical smell when the unit is running.
Overheating Electrical Component or Motor
Symptom
Buttons on the control panel do not respond or respond intermittently.
Keypad / Control Panel Fault
Symptom
Condenser fan not running while compressor is on; unit overheats and shuts down.
Condenser Fan Failure
Symptom
Evaporator coil freezes over with ice, reducing airflow and cooling.
Evaporator Icing / Low Airflow or Low Charge
Symptom
Excessive vibration or unit rattles the window or floor during operation.
Vibration / Mounting Fault
Symptom
Indoor fan does not run; compressor may start and coil may freeze.
Indoor Blower Motor Failure
Symptom
Musty or moldy odor from the air conditioner when it starts.
Biological Growth in Evaporator and Drain System
Symptom
Remote control does not operate the air conditioner.
Remote Control / IR Receiver Fault
Symptom
Unit blows warm air in COOL mode; compressor seems to run but no cooling.
Refrigerant Circuit Failure
Symptom
Unit cools briefly then shuts off compressor, cycling on and off frequently.
Short Cycling / Incorrect Temperature Sensing
Symptom
Unit frequently trips the household circuit breaker or blows fuses.
Overcurrent / Short Circuit Condition
Symptom
Unit powers on but compressor never starts; only fan runs and no cooling occurs.
Compressor Not Starting
Symptom
Unit runs but does not cool the room effectively; air from vents is not very cold.
Poor Cooling Performance
Symptom
Unit runs but makes loud rattling, buzzing, or grinding noises.
Mechanical Noise / Vibration Fault
Symptom
Unit turns on and off by itself or changes settings without input.
Control Logic / Interference Fault
Symptom
Water leaking from the front or sides of the unit into the room.
Condensate Drainage / Water Leak Fault
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| CF |
Display shows CF after a certain number of operating hours; unit still runs.
|
Filter Clean Reminder (Not a Fault) | View Details |
| E1 |
Unit will not run, display shows E1 shortly after power-up or when trying to change modes.
|
Room Temperature Sensor (Ambient Thermistor) Fault | View Details |
| E2 |
Unit stops cooling and displays E2, fan may still run.
|
Evaporator Coil Temperature Sensor Fault | View Details |
| E3 |
Display shows E3, compressor does not start or stops shortly after starting.
|
Condenser Coil Temperature Sensor Fault | View Details |
| E4 |
Unit stops and displays E4, often after running for some time; may be accompanied by water in the base pan.
|
Full Water Tank / High-Level Float Switch Activated (Portable Models) | View Details |
| E5 |
Display shows E5 and the compressor does not start or shuts down quickly.
|
Compressor Overload / Overcurrent Protection or Voltage Error (Model-Dependent) | View Details |
| E6 |
Display shows E6, unit may not respond to remote or may not start compressor.
|
Communication Error Between Display Board and Main PCB (or Indoor/Outdoor Boards on Split Units) | View Details |
| E7 |
Display shows E7, unit may run fan only or shut down cooling.
|
Indoor Fan Motor Feedback / Hall Sensor Error (DC Fan Models) | View Details |
| E8 |
Display shows E8 and unit may shut down or limit operation, sometimes after long runtime in high heat.
|
High-Temperature Protection / Overload Protection | View Details |
| E9 |
Display shows E9, unit may not start or may shut down unexpectedly.
|
EEPROM / Memory Error on Main PCB | View Details |
| F1 |
Display shows F1, unit may not cool properly or may shut down.
|
Indoor Ambient Sensor Fault (Alternate Code Set) | View Details |
| F2 |
Display shows F2, cooling stops or unit cycles off quickly.
|
Evaporator Sensor Fault (Alternate Code Set) | View Details |
| F3 |
Display shows F3, unit may shut down under high load or not start compressor.
|
Condenser Sensor Fault (Alternate Code Set) | View Details |
| F4 |
Display shows F4, unit may not respond to commands or may shut down unexpectedly.
|
Indoor Fan Motor Error / Feedback Fault | View Details |
| H1 |
Display shows H1, unit may run fan only or delay compressor start.
|
Defrost or Low-Temperature Protection Mode (Heat Pump / Some Cooling Models) | View Details |
| H3 |
Display shows H3, compressor does not run or shuts down quickly.
|
Compressor Overload / Overheat Protection | View Details |
| H4 |
Display shows H4, unit may not cool or may shut down intermittently.
|
Indoor-Outdoor Communication Fault (Split Systems) or General Protection | View Details |
| HI |
Display shows HI and unit may run continuously or shut down on protection.
|
High Ambient Temperature Indication / Sensor Reading Above Range | View Details |
| LO |
Display shows LO and unit may not start cooling; often occurs in very cold rooms.
|
Low Ambient Temperature Protection / Sensor Reading Below Range | View Details |
| P1 |
Portable AC stops cooling and displays P1; fan may continue to run.
|
Bottom Water Tray Full / High-Level Protection (Portable Models) | View Details |
| P2 |
Portable AC displays P2 and may stop cooling or dehumidifying.
|
Upper Water Tray Full / Secondary Float Triggered (Some Portable Models) | View Details |
| – |
Air conditioner will not turn on at all; no lights or display.
|
No Power / Dead Unit | View Details |
| – |
Burning or electrical smell when the unit is running.
|
Overheating Electrical Component or Motor | View Details |
| – |
Buttons on the control panel do not respond or respond intermittently.
|
Keypad / Control Panel Fault | View Details |
| – |
Condenser fan not running while compressor is on; unit overheats and shuts down.
|
Condenser Fan Failure | View Details |
| – |
Evaporator coil freezes over with ice, reducing airflow and cooling.
|
Evaporator Icing / Low Airflow or Low Charge | View Details |
| – |
Excessive vibration or unit rattles the window or floor during operation.
|
Vibration / Mounting Fault | View Details |
| – |
Indoor fan does not run; compressor may start and coil may freeze.
|
Indoor Blower Motor Failure | View Details |
| – |
Musty or moldy odor from the air conditioner when it starts.
|
Biological Growth in Evaporator and Drain System | View Details |
| – |
Remote control does not operate the air conditioner.
|
Remote Control / IR Receiver Fault | View Details |
| – |
Unit blows warm air in COOL mode; compressor seems to run but no cooling.
|
Refrigerant Circuit Failure | View Details |
| – |
Unit cools briefly then shuts off compressor, cycling on and off frequently.
|
Short Cycling / Incorrect Temperature Sensing | View Details |
| – |
Unit frequently trips the household circuit breaker or blows fuses.
|
Overcurrent / Short Circuit Condition | View Details |
| – |
Unit powers on but compressor never starts; only fan runs and no cooling occurs.
|
Compressor Not Starting | View Details |
| – |
Unit runs but does not cool the room effectively; air from vents is not very cold.
|
Poor Cooling Performance | View Details |
| – |
Unit runs but makes loud rattling, buzzing, or grinding noises.
|
Mechanical Noise / Vibration Fault | View Details |
| – |
Unit turns on and off by itself or changes settings without input.
|
Control Logic / Interference Fault | View Details |
| – |
Water leaking from the front or sides of the unit into the room.
|
Condensate Drainage / Water Leak Fault | View Details |
No matching codes found
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