LO
Samsung Washing Machine
Severity: ModerateWhat Does This Error Mean?
The LO error means the door lock mechanism has failed or is stuck. The washer cannot confirm the door is properly secured. It will not start or continue a cycle until the lock is working.
Affected Models
- WF45T6000AW
- WF45R6100AW
- WF42H5000AW
- Most Samsung front-load washers
Common Causes
- Door latch is physically damaged or worn out
- Small clothing items caught in the door seal blocking the latch
- Door lock actuator (solenoid) has failed electrically
- Wiring harness connecting the lock to the control board is loose or broken
- Control board not sending the correct signal to the door lock
How to Fix It
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Open the door and inspect the door latch area carefully.
Look for socks, underwear, or any small item jammed around the latch.
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Wipe the door seal (rubber gasket) clean with a damp cloth.
Debris in the seal can prevent the door from closing flush against the frame.
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Close the door firmly and listen for a click.
The lock should engage with an audible click. No click means the latch is not catching.
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Power cycle the washer — unplug for 60 seconds, then plug back in.
A brief power reset can clear a stuck lock signal from the control board.
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If the error persists, the door lock assembly needs to be replaced.
Do not force cycles with a malfunctioning door lock — water leaks can result.
When to Call a Professional
If you have cleared the door of obstructions and the error continues — the door lock assembly likely needs replacement. This is a repair a technician can complete in under an hour. Typical cost is $80–$175 for parts and labor.
Frequently Asked Questions
Can I manually unlock a Samsung washer showing LO?
Most Samsung front-loaders have an emergency drain cord inside the lower access panel. Pulling this cord allows the door to open after draining. Check your user manual for the exact location on your model.
How much does a Samsung washer door lock replacement cost?
The door lock part itself costs around $25–$60 depending on the model. If a technician does it, total cost with labor is typically $80–$175. It is a straightforward repair.
Will the LO error clear itself?
Occasionally a power reset clears it if it was a one-time electronic glitch. But if the physical latch is worn or the solenoid has failed, the error will keep returning. Persistent LO errors need a part replacement.