Hisense Air Conditioners Error Codes

E1

Indoor unit displays E1 and the air conditioner will not start or stops shortly after starting.

Indoor/Outdoor Communication Failure

E2

Indoor unit displays E2 and the unit stops cooling or heating; fan may still run.

Indoor Evaporator Coil Temperature Sensor (T1) Fault

E3

Indoor unit displays E3 and the unit stops; may occur during defrost or heavy load conditions.

Outdoor Condenser Coil Temperature Sensor (T2) Fault

E4

Indoor unit displays E4 and the unit shuts down, often after running for some time in cooling mode.

High Discharge Temperature / Compressor Discharge Sensor (T3) Fault

E5

Indoor unit displays E5 and the system does not start or stops shortly after starting.

Overcurrent Protection / Compressor Overload

E6

Indoor unit displays E6 and the unit does not respond to remote commands or stops unexpectedly.

Indoor Fan Motor or Zero-Cross Detection Fault

E7

Indoor unit displays E7 and the system will not run or only one mode works.

Mode Conflict / Indoor-Outdoor Mode Mismatch

E8

Indoor unit displays E8 and the unit stops; may be accompanied by very low airflow or ice on the indoor coil.

Indoor Coil Freeze Protection / Low Evaporator Temperature

E9

Indoor unit displays E9 and the unit may shut down or run erratically.

Indoor Room Temperature Sensor (Troom) Fault

F0

Indoor unit displays F0 and the unit does not cool or heat properly.

Refrigerant System Undercharge / Low Refrigerant Protection

F1

Indoor unit displays F1 and the unit may run with poor performance or shut down.

Indoor Coil Sensor (T1) Abnormal / Out-of-Range Reading

F2

Indoor unit displays F2 and may stop during heating or defrost cycles.

Outdoor Coil Sensor (T2) Abnormal / Out-of-Range Reading

F3

Indoor unit displays F3 and the unit may shut down under heavy load.

Discharge Temperature Sensor (T3) Abnormal / Out-of-Range Reading

F4

Indoor unit displays F4 and the outdoor unit does not start or stops quickly.

Outdoor Fan Motor Fault

F5

Indoor unit displays F5 and the unit may not cool effectively, especially in high ambient temperatures.

Outdoor Unit Overload / High Ambient Protection

F6

Indoor unit displays F6 and the unit may not reach set temperature or may cycle frequently.

Indoor-Outdoor Capacity Mismatch / Frequency Limitation

F7

Indoor unit displays F7 and the unit may not start or may shut down unexpectedly.

Phase Loss / Power Supply Abnormality (for 3‑phase or specific models)

F8

Indoor unit displays F8 and the unit may run at reduced capacity or shut down in extreme conditions.

Low Outdoor Ambient Protection / Low Temperature Lockout

F9

Indoor unit displays F9 and the unit may not respond correctly to temperature settings.

Indoor Room Sensor Offset / Calibration Error

H1

Indoor unit displays H1 and heating does not start immediately; indoor fan may stop.

Defrost Mode / Heating Delay Indication

H3

Indoor unit displays H3 and the unit shuts down, usually during heavy cooling or heating.

Compressor Overload Protection

H4

Indoor unit displays H4 and the unit may not start or may stop after a short run.

Indoor-Outdoor Communication Timeout / EEPROM Error (model-dependent)

H5

Indoor unit displays H5 and the unit does not start or stops quickly.

IPM (Intelligent Power Module) Protection / Inverter Module Fault

H6

Indoor unit displays H6 and the indoor fan does not run or runs erratically.

Indoor Fan Motor Lock / Feedback Error

H7

Indoor unit displays H7 and the outdoor unit may not start or may run at limited capacity.

Compressor Position / Motor Drive Error (Inverter Models)

P0

Indoor unit displays P0 and the unit may not start or may run at reduced power.

DC Bus Voltage Protection

P1

Indoor unit displays P1 and the unit may shut down during operation.

High or Low Voltage Protection

P2

Portable Hisense air conditioner displays P2 and stops cooling; water full indicator may be on.

Full Condensate Tank / High Water Level Protection

P3

Portable Hisense air conditioner displays P3 and stops or runs at reduced capacity.

Low Temperature Protection / Anti-Freeze for Portable Unit

P4

Portable Hisense air conditioner displays P4 and stops cooling.

High Temperature Protection / Compressor Overheat (Portable)

Symptom

Hisense air conditioner displays lights but buttons on the indoor unit do not respond.

Keypad / Control Panel Failure

Symptom

Hisense air conditioner does not turn on at all; no lights or display.

No Power / Dead Unit

Symptom

Hisense air conditioner emits a burning or electrical smell.

Overheating Electrical Component

Symptom

Hisense air conditioner emits a musty or moldy smell when starting.

Biological Growth on Evaporator Coil and Drain Pan

Symptom

Hisense air conditioner frequently turns on and off (short cycling).

Short Cycling / Improper Control or Sizing

Symptom

Hisense air conditioner indoor unit fan runs but no air comes out of vents or airflow is extremely weak.

Airflow Restriction / Blower Obstruction

Symptom

Hisense air conditioner indoor unit louver does not swing or is stuck in one position.

Swing Motor / Louver Mechanism Failure

Symptom

Hisense air conditioner makes loud rattling or buzzing noises during operation.

Mechanical Vibration / Loose Components

Symptom

Hisense air conditioner powers on but compressor and outdoor unit do not start; only indoor fan runs.

Outdoor Unit Not Running

Symptom

Hisense air conditioner remote control does not operate the unit.

Remote Control / IR Receiver Failure

Symptom

Hisense air conditioner runs but does not cool the room effectively.

Insufficient Cooling Capacity / Performance Loss

Symptom

Water dripping from the front of the Hisense indoor unit or from the air outlet.

Indoor Unit Water Leakage

Symptom

Water leaking from the base of the Hisense outdoor unit.

Outdoor Unit Condensate or Defrost Water Leakage