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Samsung Washer 3C4 Error Code: Causes and Fixes

Quick answer: On a Samsung Washer, the 3C4 error code means the motor hall sensor (position sensor / tachometer) has failed or is providing no signal to the control board. The Samsung Washer 3C4 code is a dedicated hall sensor fault. Without hall sensor feedback, the control board cannot determine whether the motor is running, at what speed, or in what direction. The machine stops and displays 3C4 as a safety measure. This is one of the most common motor-related faults and is usually resolved by replacing the hall sensor.

Quick Fix for Samsung Washer 3C4

Cancel the cycle and unplug the Samsung Washer for 5 minutes.
Check the drum load — remove items if overloaded and redistribute evenly.
Manually rotate the drum through the door to check for mechanical resistance.
Reconnect and restart. If 3C4 returns, the motor system needs diagnosis.

Common Causes of Samsung Washer 3C4

Failed hall sensor: The sensor has physically failed and provides no output.
Disconnected sensor connector: The sensor wiring connector has come loose from the motor or control board.
Broken sensor wire: The thin wires leading to the hall sensor can break, especially near the motor due to vibration.
Sensor contaminated with debris: In rare cases, metallic debris or water ingress can disrupt hall sensor operation.