De'Longhi
De'Longhi 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 extended use; unit may still operate but requests filter maintenance.
Filter Cleaning Reminder
E1
Display shows E1 and the unit will not start or stops shortly after starting.
Room Temperature Sensor (NTC) Fault
E2
Display shows E2 and cooling or heating stops; fan may still run.
Evaporator Coil Temperature Sensor Fault
E3
Display shows E3 and the unit stops cooling; compressor may not start.
Condenser Coil Temperature Sensor Fault
E4
Display shows E4 and the unit shuts down; may be accompanied by water in the base pan.
Full Condensate Tank / Overflow Protection
E5
Display shows E5 and the unit stops; may occur during compressor start.
Compressor Overload / High-Pressure Protection
E6
Display shows E6 and the unit will not run in COOL or HEAT.
Communication Error Between Indoor and Outdoor PCB (for split systems) or Internal PCB Communication Fault
E7
Display shows E7 and the unit may not respond to mode changes.
Mode Conflict / Reversing Valve or Control Logic Error
E8
Display shows E8 and the unit shuts down unexpectedly, often during heavy use.
Overload / Overcurrent Protection
E9
Display shows E9 and the unit may not respond to remote or panel inputs correctly.
EEPROM / Memory Error on Main PCB
Ft
Display shows Ft and the unit stops; often associated with frost or ice on the coil.
Frost Protection / Defrost Mode Indication
HL
Unit stops and displays HL; compressor and fan shut down, control panel still responsive.
High Temperature Protection / Overheat Lockout
LE
Display shows LE and the unit stops cooling; may beep repeatedly.
Low Refrigerant / Refrigeration System Error (generic)
Lt
Display shows Lt and the unit stops or will not start cooling in low ambient temperature conditions.
Low Temperature Protection / Anti-Freeze Mode
LtE
Display shows LtE and cooling stops; fan may continue to run.
Low Temperature Error / Evaporator Freeze Protection
P1
Display shows P1 and the unit stops cooling; may indicate low temperature or protection mode.
Low Temperature / Protection Mode (Model-Specific)
P2
Display shows P2 and the unit stops; often related to water tank or drainage on some De'Longhi models.
Condensate Tank Full / Drainage Protection (Alternate Code)
PF
Display shows PF and the unit stops cooling after a power interruption or brownout.
Power Failure / Voltage Interruption Detection
Symptom
Burning or electrical smell when the unit is running.
Overheating Electrical Component
Symptom
De'Longhi air conditioner in HEAT mode blows cold or only slightly warm air.
Heat Pump Heating Failure
Symptom
De'Longhi portable AC exhaust hose becomes very hot and room does not cool effectively.
Excessive Exhaust Temperature / Poor Venting
Symptom
De'Longhi portable AC shows correct display but buttons on the control panel do not respond.
Keypad / Control Panel Failure
Symptom
Fan runs but airflow from the front grille is very weak even on high speed.
Restricted Airflow / Blower Obstruction
Symptom
Frost or ice buildup on the front evaporator coil during cooling.
Evaporator Coil Icing
Symptom
Musty or moldy smell from the air outlet when the unit starts.
Biological Growth on Evaporator and Drain System
Symptom
Remote control does not operate the De'Longhi air conditioner; unit only responds to panel buttons.
Remote Control / IR Receiver Failure
Symptom
Timer function does not work; unit does not turn on or off at programmed times.
Timer / Clock Function Failure
Symptom
Unit blows warm air in COOL mode; compressor appears to run.
Loss of Cooling Capacity with Running Compressor
Symptom
Unit cools but makes loud rattling or vibrating noises during operation.
Mechanical Vibration / Loose Components
Symptom
Unit displays temperature but does not respond to any commands from remote or panel (frozen controls).
Control System Lockup
Symptom
Unit does not power on at all; no lights or display on De'Longhi air conditioner.
No Power / Dead Unit
Symptom
Unit emits clicking or ticking noises periodically during operation.
Thermal Expansion / Plastic Casing Noise or Relay Operation
Symptom
Unit frequently turns on and off (short cycling) without reaching set temperature.
Short Cycling / Control or Sizing Issue
Symptom
Unit operates but display is blank or very dim; controls may still work.
Display Backlight / LCD Failure
Symptom
Unit powers on but compressor never starts; only fan runs and no cooling occurs.
Compressor Start Failure
Symptom
Unit runs but provides very little or no cooling; air from outlet is only slightly cooler than room.
Insufficient Cooling Capacity
Symptom
Unit runs in DRY (dehumidify) mode but produces little or no water.
Low Dehumidification Performance
Symptom
Unit trips the household circuit breaker when starting or shortly after.
Overcurrent / Short Circuit
Symptom
Water leaking from the bottom of the De'Longhi air conditioner onto the floor.
Condensate Leakage / Drainage Failure
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| CF |
Display shows CF after extended use; unit may still operate but requests filter maintenance.
|
Filter Cleaning Reminder | View Details |
| E1 |
Display shows E1 and the unit will not start or stops shortly after starting.
|
Room Temperature Sensor (NTC) Fault | View Details |
| E2 |
Display shows E2 and cooling or heating stops; fan may still run.
|
Evaporator Coil Temperature Sensor Fault | View Details |
| E3 |
Display shows E3 and the unit stops cooling; compressor may not start.
|
Condenser Coil Temperature Sensor Fault | View Details |
| E4 |
Display shows E4 and the unit shuts down; may be accompanied by water in the base pan.
|
Full Condensate Tank / Overflow Protection | View Details |
| E5 |
Display shows E5 and the unit stops; may occur during compressor start.
|
Compressor Overload / High-Pressure Protection | View Details |
| E6 |
Display shows E6 and the unit will not run in COOL or HEAT.
|
Communication Error Between Indoor and Outdoor PCB (for split systems) or Internal PCB Communication Fault | View Details |
| E7 |
Display shows E7 and the unit may not respond to mode changes.
|
Mode Conflict / Reversing Valve or Control Logic Error | View Details |
| E8 |
Display shows E8 and the unit shuts down unexpectedly, often during heavy use.
|
Overload / Overcurrent Protection | View Details |
| E9 |
Display shows E9 and the unit may not respond to remote or panel inputs correctly.
|
EEPROM / Memory Error on Main PCB | View Details |
| Ft |
Display shows Ft and the unit stops; often associated with frost or ice on the coil.
|
Frost Protection / Defrost Mode Indication | View Details |
| HL |
Unit stops and displays HL; compressor and fan shut down, control panel still responsive.
|
High Temperature Protection / Overheat Lockout | View Details |
| LE |
Display shows LE and the unit stops cooling; may beep repeatedly.
|
Low Refrigerant / Refrigeration System Error (generic) | View Details |
| Lt |
Display shows Lt and the unit stops or will not start cooling in low ambient temperature conditions.
|
Low Temperature Protection / Anti-Freeze Mode | View Details |
| LtE |
Display shows LtE and cooling stops; fan may continue to run.
|
Low Temperature Error / Evaporator Freeze Protection | View Details |
| P1 |
Display shows P1 and the unit stops cooling; may indicate low temperature or protection mode.
|
Low Temperature / Protection Mode (Model-Specific) | View Details |
| P2 |
Display shows P2 and the unit stops; often related to water tank or drainage on some De'Longhi models.
|
Condensate Tank Full / Drainage Protection (Alternate Code) | View Details |
| PF |
Display shows PF and the unit stops cooling after a power interruption or brownout.
|
Power Failure / Voltage Interruption Detection | View Details |
| – |
Burning or electrical smell when the unit is running.
|
Overheating Electrical Component | View Details |
| – |
De'Longhi air conditioner in HEAT mode blows cold or only slightly warm air.
|
Heat Pump Heating Failure | View Details |
| – |
De'Longhi portable AC exhaust hose becomes very hot and room does not cool effectively.
|
Excessive Exhaust Temperature / Poor Venting | View Details |
| – |
De'Longhi portable AC shows correct display but buttons on the control panel do not respond.
|
Keypad / Control Panel Failure | View Details |
| – |
Fan runs but airflow from the front grille is very weak even on high speed.
|
Restricted Airflow / Blower Obstruction | View Details |
| – |
Frost or ice buildup on the front evaporator coil during cooling.
|
Evaporator Coil Icing | View Details |
| – |
Musty or moldy smell from the air outlet when the unit starts.
|
Biological Growth on Evaporator and Drain System | View Details |
| – |
Remote control does not operate the De'Longhi air conditioner; unit only responds to panel buttons.
|
Remote Control / IR Receiver Failure | View Details |
| – |
Timer function does not work; unit does not turn on or off at programmed times.
|
Timer / Clock Function Failure | View Details |
| – |
Unit blows warm air in COOL mode; compressor appears to run.
|
Loss of Cooling Capacity with Running Compressor | View Details |
| – |
Unit cools but makes loud rattling or vibrating noises during operation.
|
Mechanical Vibration / Loose Components | View Details |
| – |
Unit displays temperature but does not respond to any commands from remote or panel (frozen controls).
|
Control System Lockup | View Details |
| – |
Unit does not power on at all; no lights or display on De'Longhi air conditioner.
|
No Power / Dead Unit | View Details |
| – |
Unit emits clicking or ticking noises periodically during operation.
|
Thermal Expansion / Plastic Casing Noise or Relay Operation | View Details |
| – |
Unit frequently turns on and off (short cycling) without reaching set temperature.
|
Short Cycling / Control or Sizing Issue | View Details |
| – |
Unit operates but display is blank or very dim; controls may still work.
|
Display Backlight / LCD Failure | View Details |
| – |
Unit powers on but compressor never starts; only fan runs and no cooling occurs.
|
Compressor Start Failure | View Details |
| – |
Unit runs but provides very little or no cooling; air from outlet is only slightly cooler than room.
|
Insufficient Cooling Capacity | View Details |
| – |
Unit runs in DRY (dehumidify) mode but produces little or no water.
|
Low Dehumidification Performance | View Details |
| – |
Unit trips the household circuit breaker when starting or shortly after.
|
Overcurrent / Short Circuit | View Details |
| – |
Water leaking from the bottom of the De'Longhi air conditioner onto the floor.
|
Condensate Leakage / Drainage Failure | View Details |
No matching codes found
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