Samsung AC CF Code — Filter Cleaning Reminder (Not an Error)
On a Samsung AC, CF is not an error — it is a filter-cleaning reminder. Clean the indoor air filter and the code clears.
Samsung Air Conditioner Error Codes
Every Samsung Air Conditioner code we cover — tap a code for the full fix.
Samsung AC dF Code — Defrost Mode Explained (Normal Behaviour)
dF on a Samsung AC means the unit is in defrost mode — normal in heating. It pauses briefly to melt frost on the outdoor…
Samsung AC E1 Error — Room Temperature Sensor Fault & How to Fix It
On a Samsung air conditioner, E1 means the indoor room temperature sensor (thermistor) is shorted, open or defective. Th…
Samsung AC E101 Error — Indoor Communication Failure Fix
E101 on a Samsung AC means the indoor unit lost communication — usually a loose connection or damaged cable around the i…
Samsung AC E102 Error — Outdoor Communication Fault Solved
E102 on a Samsung AC means faulty communication at the outdoor unit — commonly a loose connection between indoor and out…
Samsung AC E121 Error — Room Temperature Sensor Fault & Fix
E121 on a Samsung AC means the indoor room temperature sensor (thermistor) has an open or short circuit.
Samsung AC E122 Error — Evaporator IN Sensor Fault & Fix
E122 means the indoor evaporator-inlet pipe sensor is open or shorted. The unit cannot monitor refrigerant temperature e…
Samsung AC E154 Error — Indoor Fan Motor Fault & Fix
E154 on a Samsung AC means the indoor fan motor is not running or not sending a speed-feedback signal to the PCB.
Samsung AC E162 Error — Indoor EEPROM Fault & Fix
E162 means the indoor unit EEPROM (memory chip) has a read/write error. The PCB cannot load its configuration data.
Samsung AC E2 Error — Indoor Coil Sensor Fault & Fix
E2 on a Samsung AC means the indoor coil (evaporator) temperature sensor has an open or short circuit. The unit stops to…
Samsung AC E201 Error — Indoor/Outdoor Unit Mismatch & Fix
E201 means the number of indoor units detected does not match the outdoor unit setting. Common after installation or whe…
Samsung AC E202 Error — Indoor/Outdoor Communication Fault & Fix
E202 on a Samsung AC means the indoor and outdoor units have lost communication after the initial tracking was complete.
Samsung AC E221 Error — Outdoor Temperature Sensor Fault & Fix
E221 means the outdoor ambient temperature sensor has an open or short circuit. The outdoor unit cannot measure outside…
Samsung AC E231 Error — Condenser Temperature Sensor Fault & Fix
E231 means the condenser (outdoor coil) temperature sensor has an open or short circuit.
Samsung AC E251 Error — Discharge Temperature Sensor Fault & Fix
E251 means the compressor discharge temperature sensor has an open or short circuit on the outdoor unit.
Samsung AC E3 Error — Float Switch / Drain Issue & Fix
E3 on a Samsung AC means the float switch has triggered — the condensate drain pan is full, usually because the drain li…
Samsung AC E301 Error — High Pressure Sensor Fault & Fix
E301 means the high-pressure sensor on the outdoor unit has an open or short circuit.
Samsung AC E4 Error — Outdoor Discharge Pipe Overheating & Solution
E4 on a Samsung AC means the outdoor discharge pipe temperature is too high. The unit shuts down to protect the compress…
Samsung AC E403 Error — Compressor Overload Protection & Fix
E403 means the system has stopped due to overload protection — the compressor is drawing too much current or the system…
Samsung AC E416 Error — Discharge Temperature Over Limit & Fix
E416 means the compressor discharge temperature has exceeded the safe limit. The unit stops to protect the compressor.
Samsung AC E422 Error — EEV Close Self-Diagnosis Fault & Fix
E422 means the electronic expansion valve (EEV) close self-diagnosis has failed on the outdoor unit.
Samsung AC E452 Error — Instant Power-Off Fault & Fix
E452 indicates an instant power-off error — the outdoor unit detected a sudden power interruption to the inverter circui…
Samsung AC E464 Error — DC Link Over-Voltage & Fix
E464 means the DC-link voltage inside the outdoor inverter circuit has exceeded the safe limit.
Samsung AC E5 Error — Indoor Heat Exchanger Sensor Problem & Fix
E5 on a Samsung AC means the indoor heat exchanger sensor is open or short. The sensor usually needs inspection or repla…
Samsung AC E554 Error — Refrigerant Gas Leak Detection & Fix
E554 means the system has detected a possible refrigerant gas leak. The unit stops to prevent compressor damage from run…
Samsung AC E556 Error — Indoor/Outdoor Capacity Mismatch & Fix
E556 means the system has detected a capacity mismatch between the indoor and outdoor units — they are not compatible or…
Samsung AC E6 Error — Outdoor Heat Exchanger Sensor Fault Explained
E6 on a Samsung AC indicates a defective outdoor heat exchanger sensor (open or short). The sensor needs checking or rep…
Samsung AC E7 Error — Heater Temperature Sensor Fault & Fix
E7 on a Samsung AC means the heater temperature sensor is open or short, so it cannot read the heat exchanger surface te…
Samsung AC E9 Error — Float Switch / Drainage Fault & Fix
E9 on a Samsung AC signals a float switch or drainage fault — the condensate drain is blocked or the float switch is fau…