Midea Air Conditioners Error Codes

C0

Display shows C0; unit may not respond to remote or may operate in limited mode

EEPROM or Configuration Error

E1

Indoor unit stops and displays E1; unit may not respond to remote or buttons

Indoor/Outdoor Communication Failure

E2

Indoor unit stops cooling and displays E2; may run briefly then shut down

Indoor Evaporator Coil Freeze Protection / Anti-freeze Protection

E3

Outdoor unit stops and E3 appears; unit may start then quickly shut down in cooling mode

High-Pressure Protection / Outdoor Overload Protection

E4

Unit stops in heating mode and displays E4; may blow cold air before shutting down

Defrost Protection / Outdoor Coil Overheat or Frost Protection

E5

Unit does not start or stops shortly after starting; E5 displayed on indoor unit

Overcurrent Protection / Compressor Overload

E6

Indoor unit shows E6 and stops; sometimes occurs during mode change or startup

Indoor-Outdoor Communication Error (Alternate Code) / Zero-Crossing or Feedback Error

E7

Indoor unit displays E7; unit may not respond to mode changes or may run in wrong mode

Mode Conflict / Indoor-Outdoor Mode Mismatch

E8

Unit stops and displays E8; may be accompanied by very low or no airflow from indoor unit

Indoor Fan Motor Fault / Overload Protection

E9

Indoor unit shows E9; sometimes associated with water leakage or full drain pan

Full Water Protection / Condensate Pump or Float Switch Fault (for some cassette/ducted models)

F0

Unit displays F0 and stops cooling; may restart and fail again

Refrigerant Leakage Protection / Low Refrigerant Protection

F1

Indoor unit displays F1; unit may run but with poor temperature control

Indoor Ambient Temperature Sensor (T1) Fault

F2

Indoor unit displays F2; unit may stop or run erratically

Indoor Evaporator Coil Temperature Sensor (T2) Fault

F3

Outdoor unit or system displays F3; heating or cooling performance is unstable

Outdoor Ambient Temperature Sensor (T4) Fault

F4

System shows F4; compressor may not start or may shut down quickly

Outdoor Discharge Pipe Temperature Sensor (T3) Fault

F5

Unit displays F5; may occur during heating or cooling with poor performance

Outdoor Coil Temperature Sensor Fault or Overload (Model-dependent)

F6

Unit shows F6; compressor speed limited and poor cooling/heating

Low Refrigerant or Compressor Overload (Model-dependent Protection Code)

F7

Unit displays F7; may not start or may shut down unexpectedly

Outdoor Fan Motor Fault (Alternate Code) or Phase Protection (for some models)

F8

Unit shows F8; may relate to indoor fan or overheat protection depending on model

Indoor Fan Overload / Overheat Protection

F9

Unit displays F9; may be associated with abnormal defrost or heating performance

Defrost Sensor or Defrost Protection Fault

H1

Display shows H1; indoor unit may blow cold air or stop during heating

Defrost Mode Indication (Not a Fault) / Heating Delay

H3

Unit stops and displays H3; compressor does not run

Compressor Overload Protection / Overheat

H4

Unit displays H4 and stops; may restart after power cycle then fail again

Inverter Module Protection / Drive Error

H5

Unit shows H5; system may not start or may shut down quickly

IPM Protection / Current Protection (Alternate Code)

P0

Unit displays P0; compressor may not start or may run at reduced capacity

DC Bus Voltage Protection / Inverter Power Supply Fault

P1

Unit shows P1; may shut down during operation, especially in cooling

High or Low Voltage Protection (Indoor or Outdoor)

P2

Portable Midea AC displays P2; unit stops cooling and may beep

Full Condensate Tank / High Water Level Protection (Portable AC)

P4

Unit displays P4; compressor may not run or may shut down intermittently

Inverter Module Overheat Protection

Symptom

Burning, electrical, or plastic smell from indoor or outdoor unit

Overheating Electrical Component or Insulation

Symptom

Indoor unit display or LEDs flicker, dim, or go blank intermittently

Indoor Control Power Instability

Symptom

Indoor unit does not power on at all; no lights or display

No Power to Indoor Unit

Symptom

Indoor unit emits a musty, moldy, or sour smell when operating

Biological Growth on Evaporator Coil and Drain Pan

Symptom

Indoor unit runs but no cooling; air coming out is room temperature or only slightly cool

Loss of Cooling Capacity / Low Refrigerant or Compressor Failure

Symptom

Indoor unit runs but no heating in HEAT mode; air is cool or only slightly warm

Heat Pump Heating Failure

Symptom

Loud humming, buzzing, or grinding noise from outdoor unit

Outdoor Mechanical Noise / Fan or Compressor Issue

Symptom

Loud rattling, buzzing, or grinding noise from indoor unit during operation

Indoor Mechanical Noise / Fan or Panel Vibration

Symptom

Outdoor unit does not run while indoor unit appears normal (blowing room temperature air)

Outdoor Unit Power or Control Failure

Symptom

Remote control does not operate the indoor unit

Remote Control or IR Receiver Failure

Symptom

Unit frequently turns on and off (short cycling) without reaching set temperature

Short Cycling / Control or Capacity Issue

Symptom

Unit runs continuously and room becomes too cold or too hot; does not stop at set temperature

Thermostat / Sensor Control Failure

Symptom

Unit vibrates excessively, causing noise and movement of the outdoor or indoor unit

Excessive Vibration / Mounting Issue

Symptom

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

Indoor Unit Water Leakage

Symptom

Water leaking from outdoor unit base or around piping connections

Outdoor Unit Water Leakage / Condensate or Defrost Drain Issue