Key, Emergency, Door, and Lock-State Problems

“The app says unlocked,” “the door is open,” and “the key will not turn” refer to different parts of the system. Separate the physical cylinder and bolt, any emergency-access method, the door-position sensor, and the app’s reported lock state before deciding what failed.

Distinguish the signals

Home Assistant defines locked, unlocked, open, opening, jammed, and unavailable states for its lock entity. Those labels are useful context for that platform, not a universal code list. Check the physical lock and the manufacturer’s own indicator or support guide.

Check door sensing independently

Yale describes DoorSense on the Linus L2 as an app indication of whether the door is open or closed, based on a magnetic field. Yale says nearby magnetic changes or door and frame construction can affect accuracy. Its model-specific guidance is to use the in-app calibration, align the magnet with the thumb-turn, and consider the listed spacer or additional-magnet options when the frame leaves the magnet offset.

That reading remains a door-position signal. It does not confirm that a bolt or cylinder secured the door. See the Yale Linus L2 DoorSense guide for its bounded checks.

Treat key and emergency behavior as model-specific

Confirm whether the key cylinder supports the lock’s required emergency function and whether the exact model has a documented mechanical key, backup-power input, or other fallback. Keep the manufacturer’s instructions and any required key accessible. Do not borrow another model’s emergency procedure or improvise a power connection.

The cited New Zealand Yale Assure Series support page identifies a 9 V backup-power option for certain Assure locks, with terminals below the touchscreen; confirm that the exact model supports it and follow its instructions. The KAADAS P30 Pro Max Singapore manual lists a mechanical key and low-battery indicator, but does not establish emergency steps for other regional variants. These examples are model-scoped and are not interchangeable.

Nuki warns that remote state correction can rarely turn the key in the wrong direction. Its support recommends using the on-site calibration path so someone can confirm the door is closed and locked. A remote command or a changed app state is not a substitute for checking the door in person.

If a key, handle, or thumbturn suddenly becomes difficult to operate, stop motor retries and check the mechanical sequence and alignment. See handle-lift and multipoint problems and calibration and jam diagnosis.