ErrorKhoj

All Samsung Air Conditioner error codes

37 codes Cross-checked from 2+ sources

All Samsung Air Conditioner error codes

CodeMeaningAction
CF Filter cleaning reminder Not a fault
CL Auto clean is running Not a fault
dF Defrosting (normal) Not a fault
E1 Indoor room temperature sensor fault / Indoor coil (evaporator) temperature sensor fault / Indoor fan motor fault / Memory (EEPROM) error — indoor unit boardMeaning depends on your model Needs a technician
E5 Indoor coil (evaporator) temperature sensor fault Needs a technician
E6 Outdoor coil (condenser) temperature sensor fault Needs a technician
E7 Heater temperature sensor fault Needs a technician
E101 Communication error (indoor ↔ outdoor unit) Needs a technician
E102 Communication error (indoor ↔ outdoor unit) Needs a technician
E121 Indoor room temperature sensor fault Needs a technician
E122 Indoor coil (evaporator) temperature sensor fault Needs a technician
E123 Indoor coil outlet temperature sensor fault Needs a technician
E154 Indoor fan motor fault Needs a technician
E163 Memory (EEPROM) error — indoor unit board Needs a technician
E201 Communication error (indoor ↔ outdoor unit) Needs a technician
E202 Communication error (indoor ↔ outdoor unit) Needs a technician
E203 Communication error (between control boards) Needs a technician
E221 Outdoor air temperature sensor fault Needs a technician
E231 Outdoor coil (condenser) temperature sensor fault Needs a technician
E251 Compressor discharge temperature sensor fault Needs a technician
E403 Indoor coil anti-freeze protection You can usually fix it
E407 High pressure / overload protection Needs a technician
E410 Low gas / refrigerant leak or blockage Needs a technician
E416 Compressor overheating Needs a technician
E422 Low gas / refrigerant leak or blockage Needs a technician
E440 Temperature outside working range Not a fault
E441 Temperature outside working range Not a fault
E458 Outdoor fan motor fault Needs a technician
E461 Compressor start / rotation fault Needs a technician
E462 Overcurrent / compressor overload Needs a technician
E464 Inverter board / power module protection Needs a technician
E465 Overcurrent / compressor overload Needs a technician
E466 Inverter board / power module protection Needs a technician
E467 Compressor start / rotation fault Needs a technician
E474 Inverter heat-sink temperature sensor fault Needs a technician
E500 Inverter board / power module protection Needs a technician
E554 Low gas / refrigerant leak or blockage Needs a technician

How to see the error code

Most split ACs show the code on the indoor unit display (e.g. E6, CH05). Some models only blink a light — count the blinks, or press the remote’s check/diagnosis button if your manual mentions one.

How to reset

Sources

We write every explanation in our own words from these references.

Last checked: 2026-10-20

Air Conditioner brands

LG ACVoltas ACDaikin ACBlue Star ACLloyd ACHaier ACPanasonic ACGree AC