Whynter
Whynter 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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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
Display shows E2 and cooling or heating stops; fan may still run.
Evaporator Coil Temperature Sensor Fault
E3
Display shows E3, compressor will not start or shuts down quickly.
Condenser Coil Temperature Sensor Fault
E4
Display shows E4 and unit stops cooling; may occur after long operation or in very humid conditions.
Full Condensate Tank / High Water Level Protection
E5
Display shows E5 and compressor does not start or shuts off quickly; unit may beep repeatedly.
Compressor Overload / High Temperature Protection
E6
Display shows E6 and unit will not operate in cooling or heating mode.
Communication Error Between Display Board and Main Control Board
E7
Display shows E7 and unit may not respond to mode changes or may shut down unexpectedly.
EEPROM / Memory Error on Main Control Board
E8
Display shows E8 and unit shuts down or will not start; may be accompanied by unusual fan behavior.
Indoor Fan Motor Fault / Overcurrent Protection
E9
Display shows E9 and unit stops; may occur during heating or dehumidifying modes on some models.
Exhaust Temperature Sensor / Overheat Fault
F1
Display shows F1 and unit may not respond to temperature adjustments.
Indoor Ambient Sensor Calibration / Range Error
F2
Display shows F2 and unit may shut down or not cool properly.
Evaporator Sensor Calibration / Range Error
FL
Display shows FL and unit stops cooling; fan may run.
Full Tank / Water Level Fault (Alternate Code)
H1
Display shows H1 when attempting to use heating mode; unit may not produce heat.
Heating Mode Sensor / Overheat Protection Fault
H8
Display shows H8 and unit stops heating or cooling; may indicate overload protection.
System Overload / Current Protection Fault
HI
Display shows HI and unit may not cool effectively or may cycle oddly.
High Room Temperature Indication / Sensor Range Limit
LO
Display shows LO and unit does not cool; may indicate low temperature or sensor reading.
Low Temperature / Anti‑Freeze Protection
P1
Display shows P1 and unit stops cooling; fan may continue to run.
Bottom Tray Full / Internal Condensate Protection
P2
Display shows P2 and unit stops or will not start cooling.
Upper Tank Full / Secondary Condensate Protection
PF
Display shows PF and unit will not start or resets unexpectedly.
Power Failure / Voltage Error
Symptom
Clicking sound but no response when pressing buttons on the control panel; remote may or may not work.
Faulty Keypad / Control Panel
Symptom
Display works but buttons and settings change randomly or unit turns on/off by itself.
Control Board / Keypad Interference or Failure
Symptom
Evaporator coil freezes over with ice during operation, reducing airflow and cooling.
Evaporator Freeze‑Up
Symptom
Exhaust hose of portable unit becomes extremely hot and plastic parts near it discolor or warp.
Excessive Exhaust Temperature / Poor Venting
Symptom
High‑pitched squealing or screeching noise from the unit while the fan is running.
Fan Motor or Blower Bearing Wear
Symptom
Loud rattling or vibrating noise during operation, especially when compressor starts.
Mechanical Vibration / Loose Components
Symptom
Remote control does not operate the unit; unit works from front panel.
Remote Control / IR Receiver Failure
Symptom
Strong musty or moldy odor from the air conditioner when it starts or runs.
Biological Growth in Evaporator and Drain System
Symptom
Unit blows warm air in COOL mode even though compressor appears to run.
Loss of Heat Exchange / Airflow or Refrigerant Issue
Symptom
Unit does not power on at all; display is blank and no fans run.
No Power / Dead Control
Symptom
Unit emits a burning or electrical smell when running.
Overheating Electrical Component
Symptom
Unit frequently turns on and off (short cycling) without reaching the set temperature.
Short Cycling / Control or Sizing Issue
Symptom
Unit in HEAT mode blows only cool or lukewarm air.
Heating Failure (Heat Pump or Electric Heater)
Symptom
Unit leaks water onto the floor from the bottom or rear during operation.
Condensate Leakage / Drainage Failure
Symptom
Unit powers on but compressor never starts; only fan runs and no cooling occurs.
Compressor Start Failure
Symptom
Unit runs but does not cool the room effectively; air from outlet is only slightly cooler than room air.
Reduced Cooling Capacity / Possible Refrigerant Undercharge
Symptom
Unit runs in dehumidify mode but produces very little water and humidity remains high.
Poor Dehumidification Performance
Symptom
Unit trips the household circuit breaker or blows fuses when starting or shortly after.
Overcurrent / Electrical Short
Symptom
Unit turns on but fan does not blow air; compressor may run and lines get cold or hot.
Indoor Blower Failure
Symptom
Window or wall around the unit shows signs of condensation, dampness, or mold growth.
Condensation / Poor Sealing Around Installation
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| 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 |
Display shows E2 and cooling or heating stops; fan may still run.
|
Evaporator Coil Temperature Sensor Fault | View Details |
| E3 |
Display shows E3, compressor will not start or shuts down quickly.
|
Condenser Coil Temperature Sensor Fault | View Details |
| E4 |
Display shows E4 and unit stops cooling; may occur after long operation or in very humid conditions.
|
Full Condensate Tank / High Water Level Protection | View Details |
| E5 |
Display shows E5 and compressor does not start or shuts off quickly; unit may beep repeatedly.
|
Compressor Overload / High Temperature Protection | View Details |
| E6 |
Display shows E6 and unit will not operate in cooling or heating mode.
|
Communication Error Between Display Board and Main Control Board | View Details |
| E7 |
Display shows E7 and unit may not respond to mode changes or may shut down unexpectedly.
|
EEPROM / Memory Error on Main Control Board | View Details |
| E8 |
Display shows E8 and unit shuts down or will not start; may be accompanied by unusual fan behavior.
|
Indoor Fan Motor Fault / Overcurrent Protection | View Details |
| E9 |
Display shows E9 and unit stops; may occur during heating or dehumidifying modes on some models.
|
Exhaust Temperature Sensor / Overheat Fault | View Details |
| F1 |
Display shows F1 and unit may not respond to temperature adjustments.
|
Indoor Ambient Sensor Calibration / Range Error | View Details |
| F2 |
Display shows F2 and unit may shut down or not cool properly.
|
Evaporator Sensor Calibration / Range Error | View Details |
| FL |
Display shows FL and unit stops cooling; fan may run.
|
Full Tank / Water Level Fault (Alternate Code) | View Details |
| H1 |
Display shows H1 when attempting to use heating mode; unit may not produce heat.
|
Heating Mode Sensor / Overheat Protection Fault | View Details |
| H8 |
Display shows H8 and unit stops heating or cooling; may indicate overload protection.
|
System Overload / Current Protection Fault | View Details |
| HI |
Display shows HI and unit may not cool effectively or may cycle oddly.
|
High Room Temperature Indication / Sensor Range Limit | View Details |
| LO |
Display shows LO and unit does not cool; may indicate low temperature or sensor reading.
|
Low Temperature / Anti‑Freeze Protection | View Details |
| P1 |
Display shows P1 and unit stops cooling; fan may continue to run.
|
Bottom Tray Full / Internal Condensate Protection | View Details |
| P2 |
Display shows P2 and unit stops or will not start cooling.
|
Upper Tank Full / Secondary Condensate Protection | View Details |
| PF |
Display shows PF and unit will not start or resets unexpectedly.
|
Power Failure / Voltage Error | View Details |
| – |
Clicking sound but no response when pressing buttons on the control panel; remote may or may not work.
|
Faulty Keypad / Control Panel | View Details |
| – |
Display works but buttons and settings change randomly or unit turns on/off by itself.
|
Control Board / Keypad Interference or Failure | View Details |
| – |
Evaporator coil freezes over with ice during operation, reducing airflow and cooling.
|
Evaporator Freeze‑Up | View Details |
| – |
Exhaust hose of portable unit becomes extremely hot and plastic parts near it discolor or warp.
|
Excessive Exhaust Temperature / Poor Venting | View Details |
| – |
High‑pitched squealing or screeching noise from the unit while the fan is running.
|
Fan Motor or Blower Bearing Wear | View Details |
| – |
Loud rattling or vibrating noise during operation, especially when compressor starts.
|
Mechanical Vibration / Loose Components | View Details |
| – |
Remote control does not operate the unit; unit works from front panel.
|
Remote Control / IR Receiver Failure | View Details |
| – |
Strong musty or moldy odor from the air conditioner when it starts or runs.
|
Biological Growth in Evaporator and Drain System | View Details |
| – |
Unit blows warm air in COOL mode even though compressor appears to run.
|
Loss of Heat Exchange / Airflow or Refrigerant Issue | View Details |
| – |
Unit does not power on at all; display is blank and no fans run.
|
No Power / Dead Control | View Details |
| – |
Unit emits a burning or electrical smell when running.
|
Overheating Electrical Component | View Details |
| – |
Unit frequently turns on and off (short cycling) without reaching the set temperature.
|
Short Cycling / Control or Sizing Issue | View Details |
| – |
Unit in HEAT mode blows only cool or lukewarm air.
|
Heating Failure (Heat Pump or Electric Heater) | View Details |
| – |
Unit leaks water onto the floor from the bottom or rear during operation.
|
Condensate Leakage / Drainage 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 does not cool the room effectively; air from outlet is only slightly cooler than room air.
|
Reduced Cooling Capacity / Possible Refrigerant Undercharge | View Details |
| – |
Unit runs in dehumidify mode but produces very little water and humidity remains high.
|
Poor Dehumidification Performance | View Details |
| – |
Unit trips the household circuit breaker or blows fuses when starting or shortly after.
|
Overcurrent / Electrical Short | View Details |
| – |
Unit turns on but fan does not blow air; compressor may run and lines get cold or hot.
|
Indoor Blower Failure | View Details |
| – |
Window or wall around the unit shows signs of condensation, dampness, or mold growth.
|
Condensation / Poor Sealing Around Installation | View Details |
No matching codes found
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