Seeing the W01 error on your washing machine? You’re not alone. This is a common issue across many brands—including LG, Samsung, Whirlpool, and others—and it usually shows up when the washer’s door won’t lock properly before starting a cycle.

The good news is that many causes of the washing machine door lock error are minor and can be fixed without tools or professional help. This guide will walk you through what the W01 error means, why it happens, and how to troubleshoot it safely.

What is the W01 error code?

The W01 error code indicates that your washing machine is unable to lock the door securely. This is a built-in safety feature. Washers will not start (or may stop mid-cycle) if the door doesn’t lock correctly to prevent water leaks or injuries during operation.

This error might be triggered by:

• A door that isn’t fully closed
• A mechanical issue with the latch or lock
• A malfunctioning door sensor
• Wiring or control board faults

Knowing what to look for can help you fix the issue quickly—or determine when it’s time to call a technician.

Common causes and how to fix them

🔹 Cause 1: Door not fully closed

Fix:

• Firmly push the door until you hear a click.
• Check that no clothing or small objects are stuck in the gasket (rubber seal).
• If the door is slightly misaligned, gently lift or support it while closing.

🔹 Cause 2: Damaged or misaligned door latch

Fix:

• Open the door and inspect the latch on both the door and frame.
• Look for broken plastic, loose screws, or corrosion.
• Clean the latch area with a soft cloth to remove detergent residue or debris.
• If the latch is visibly bent or cracked, it will likely need replacement.

🔹 Cause 3: Obstructed or dirty door sensor

Fix:

• Locate the sensor area (usually near the latch) and gently clean it with a dry or slightly damp cloth.
• Ensure no detergent buildup or lint is blocking the connection.
• Don’t use harsh chemicals or soak the sensor—just a light wipe should do.

🔹 Cause 4: Faulty door lock assembly

Fix:

• If the above fixes don’t work, the issue may be inside the lock mechanism or electrical wiring.
• Signs include hearing no clicking noise at all, or hearing repeated clicking with no cycle start.
• This typically requires a technician to test and possibly replace the door lock or control board.

When to call a technician

Sometimes, the W01 error means a part has failed and DIY solutions won’t cut it. Contact a professional if:

• You’ve tried the basic steps and the W01 error keeps returning
• The door won’t latch no matter what you do
• The machine clicks repeatedly or is completely silent when trying to lock
• You see other error codes or notice burnt smells, sparks, or wet areas near the door

A certified appliance technician can test wiring, replace the door lock assembly, or diagnose control board issues.

Conclusion

The W01 error usually comes down to a door that’s not locking properly—whether because of a simple obstruction, a dirty sensor, or a worn-out latch. Start by checking for basic mechanical issues and try resetting the washer.

If the problem doesn’t go away, don’t wait: calling a pro ensures your washer stays safe, efficient, and leak-free.