Is your Samsung air conditioner suddenly blowing warm air, refusing to turn on, or flashing a cryptic sequence of Red, Blue, and Yellow LED lights? A malfunctioning AC always feels like an emergency, but those flashing lights and digital “E-codes” are actually your system’s built-in self-diagnosis tool pinpointing the exact mechanical or electrical failure.
Because Samsung manufactures a wide array of units, they use two different diagnostic systems. Models without digital displays rely on specific colored LED light combinations (like a flashing Blue and Red light indicating an indoor fan error). Newer models with digital screens will display explicit alphanumeric codes, typically starting with an “E” (like E464 for an Overcurrent error or E202 for a Communication fault).
Instead of trying to count blinking lights and cross-reference them with a lost user manual, use our Official Samsung AC Error & LED Decoder below. We have compiled the complete master list for both LED light sequences and digital E-codes. Simply select your flashing light combination or error code to instantly reveal the hidden cause and the step-by-step DIY or professional solution.
The definitive diagnostic tool for Samsung LED Flashing Sequences and E-Codes.
⚠️ Pro Safety Tip: While resetting your breaker to clear a power glitch or cleaning the filters to fix a freezing issue are safe DIY fixes, errors involving IPM Overcurrents (E464), DC Link Voltages (E466), or Compressor Starting Errors (E461) should always be handled by our licensed HVAC technicians to prevent severe electrical hazards.
Samsung air conditioner blinking lights
Condition: Power reset
Condition: In the defrost operation
Condition: Error of the out door unit
Condition: Open or short circuit error of the indoor
Condition: Error of the fan in the indoor unit
Condition: Error of the second detection of the float switch
Condition: Open circuit error of the thermal fuse
Condition: Communication error between the indoor and outdoor units
Condition: Open or short circuit error of a sensor
Condition: EEPROM error
Samsung air conditioner error codes ( outdoor unit )
Samsung air conditioner error codes e121
Samsung air conditioner error codes e122
Samsung air conditioner error codes e154
Samsung air conditioner error codes e162
Samsung air conditioner error codes e202
Samsung air conditioner error codes e203
Communication error between outdoor unit
Samsung air conditioner error codes e221, e231, e251, e320
All these error codes indicate outdoor sensor error
Samsung air conditioner error codes e403
Compressor down due to freezing control
Samsung air conditioner error codes e425
Reverse phase / Loss phase detection
Samsung air conditioner error codes e458, e475
Both error codes indicate outdoor unit fan error
Samsung air conditioner error codes e461, e467
Compressor starting error / rotation error
Samsung air conditioner error codes e462, e484
Full current error / PFC over-current error
Samsung air conditioner error codes e464
IPM IPM (Over Current) error
Samsung air conditioner error codes e466, e483, e488
Error code e466 indicate DC LINK over-current / low-voltage error. Error code e483 indicate H/W DC Link Over Voltage Error. Error code e488 indicate AC Input Voltage Sensor Error
Samsung air conditioner error codes e554
Samsung air conditioner error codes e422
How to check samsung air conditioner error codes
If the air conditioning have problem and need troubleshooting, you will see the “test” icon on your remote control screen. Press the test button and the error codes will show