Symptoms
- Door doesn't lock itself after the set time
- Auto-lock triggers even when the door is still open
- Feature worked before but stopped after an update
- Auto-lock delay seems inconsistent
Likely causes
- CommonAuto-lock feature turned off or set to a very long delayIt's easy to have this setting disabled or set to an hour when you expect it in a minute or two.
- CommonDoor not closing completely, so the lock can't detect a closed stateLocks that rely on a door-position sense need the door to fully latch to trigger auto-lock reliably.
- PossibleDoor sensor accessory (if used) misaligned or low batterySome smart locks use a separate door sensor to know when it's safe to auto-lock, which can fail independently of the lock.
- PossibleApp or hub sync issue delaying the auto-lock timerA brief connectivity hiccup can delay when the timer starts or the lock command executes.
- Less commonAuto-lock intentionally paused by a linked automation or geofence settingSome setups pause auto-lock when a phone is detected nearby to avoid locking someone out accidentally.
What to do
- Open the app and confirm auto-lock is enabled with your intended delay time.
- Physically test that the door latches fully closed on its own; adjust the strike plate or door if it doesn't.
- If a separate door sensor is used, check its battery and alignment with the door frame magnet.
- Restart the lock and hub, then retest the auto-lock timer.
- Check for any geofencing or presence-based automation that might be overriding auto-lock.
- Update the lock's firmware and the app to their latest versions.
- Reduce the auto-lock delay temporarily to a short time like 30 seconds to more easily confirm the feature is working at all.
When to call a pro
If the door itself doesn't close and latch properly, a handyman can adjust the door or frame.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.