Samsung E404 Error [top] -

: If the code persists, contact Samsung Support or an authorized technician to check the compressor and refrigerant levels. Samsung Air Conditioner Error Codes and Troubleshooting

Essentially, the "brain" of your washing machine (the Main PCB) is trying to talk to the muscle (the Motor or the Display Board), but the line is dead. The machine initiates a cycle, fails to receive a confirmation signal from the motor or the subordinate control board, and halts the process to prevent damage. This results in the cycle stopping abruptly and the E404 code illuminating the display. samsung e404 error