Smart Lock Won’t Lock? Auto-Lock and Bolt Fixes

When a smart lock won’t lock, the bolt is usually hitting the strike plate, the door isn’t fully closed, or auto-lock is set up wrong. Test the bolt with the door open. If it extends fine, the door line-up is the problem, not the lock.

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A smart lock that won’t lock is one of the most common calls about electronic deadbolts, and the cause is usually the door, not the electronics. Start with the simple checks below before you think about replacing anything.

Bolt won’t extend

1. Open the door and lock it. If the bolt fully extends, the lock is working.
2. Close the door and lock it again. If it stops, beeps or reports a jam, the bolt is hitting the strike.
3. Mark test. Rub a little chalk or marker on the end of the bolt, close the door and try to lock it. The mark shows where it’s hitting.
4. Fix the line-up. Tighten hinge screws, move or file the strike, or deepen the strike hole. The full steps are in door won’t latch.

Bill’s video above covers a deadbolt people think is broken that usually isn’t. Often the hardware is fine and the door needs attention.

Auto-lock not working

• Check it’s turned on in the app and the delay is what you expect.
• Door position sensor: some locks use a sensor to know the door is closed. If it’s out of place or not calibrated, auto-lock may not fire. Follow your model’s calibration steps.
• Weak batteries can disable auto features first.
• Weatherstripping that pushes the door away from the stop can cause the bolt to bind.

Locks then unlocks, or says “jammed”

Many smart locks reverse when they feel resistance, to protect the motor. That’s a sign of binding, not a broken lock. Fix the line-up and the problem usually goes away. Also check that the lock was set up for the correct door handing (left or right) if your model asks for it.

Don’t force it

Pushing or pulling the door to help the bolt each time wears the motor and gears. Fix the cause instead.

Still not locking?

Go back through the full list in smart lock not working. If the deadbolt is hard to turn by hand, see deadbolt hard to turn.

Quick checklist

• Bolt extends fully with the door open
• Mark test shows the bolt clears the strike
• Hinge screws tight, strike hole deep enough
• Auto-lock on, with a delay you’re happy with
• Door sensor in place and calibrated, if your lock has one
• Fresh batteries