Samsung · Washer Serious

Sr — / 3E — Hall sensor / motor tach fault

The hall sensor on the BLDC drive motor isn't reporting RPM back to the inverter. The control can't verify motor speed and stops the cycle. Common after a hose-clog hard stop or after suds-induced overload.

Keep using it?
Limited use only
DIY difficulty
Hard
Verified against
samsung.com ↗

How to fix it

  1. Unplug the washer and lay it on its back to access the motor (top-load) or remove rear panel (front-load).
  2. Locate the hall sensor harness on the motor and reseat both ends.
  3. Inspect the rotor magnets for cracks or rubbing on the stator.
  4. If the harness is good, replace the hall sensor (small bolted PCB on the motor).
  5. If Sr/3E returns, replace the inverter PCB.

Why it happens

Typical signs: Cycle stops at agitate or spin · Drum doesn't turn or jerks briefly then stops · Motor hum without rotation

  • Failed motor hall sensor Sensor on the rotor side of the BLDC motor fails.
  • Loose hall sensor harness Connector at the motor or inverter vibrated loose.
  • Failed inverter PCB Drives the motor and reads the hall signal.

Parts you may need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

  • Samsung washer hall sensor Common replacement
    Amazon →
  • Samsung inverter PCB Common replacement
    Amazon →

More Samsung washer codes

3C 3C / 3E — Motor Fault 4C 4C / 4E — Water Supply Error 4C2 4C2 — Hot water connected to cold inlet 4E 4E — Water supply error (older code, same as 4C) 5C 5C / 5E / SC — Will Not Drain 5E 5E — Drain error (older code, same as 5C)

All Samsung codes → All washer codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: samsung.com.