Symptoms
- Motor makes a noise but the bolt doesn't move
- Lock jams partway through locking or unlocking
- Works fine when the door is open but not when closed
Likely causes
- CommonDeadbolt misaligned with the strike plate when the door is closedThis is the single most common cause of smart lock motor problems, since the motor can't force a badly misaligned bolt.
- CommonWeak or dead batteryInsufficient power can cause the motor to stall partway through its cycle.
- CommonDoor not closed fully or square in the frameEven a lock working perfectly can't engage a bolt if the door isn't sitting correctly.
- PossibleMechanical jam or debris in the lockDirt or a small obstruction can physically block the bolt's movement.
- Less commonMotor or gear failureAfter ruling out alignment and power, an internal mechanical failure is possible.
What to do
- Open the door and try locking/unlocking with the door open; if it works fine here, the strike plate alignment is the problem.
- With the door closed, check exactly where the bolt is catching using a flashlight.
- Adjust or enlarge the strike plate hole to remove the resistance.
- Replace the batteries even if they show a partial charge.
- Make sure the door itself is closing fully and squarely in the frame, adjusting hinges if it's sagging.
- If the lock still jams with the door open and fresh batteries, the motor or gears may need professional or warranty service.
Tools and parts
- Flashlight
- Screwdriver
- Fresh batteries
Replacement strike plateSearch: “door strike plate”
When to call a pro
Contact the manufacturer's support or a locksmith if the lock jams even with the door open and batteries fresh, since it likely needs internal repair or replacement.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.