A smart lock is a small computer bolted to your door, and like any computer it can misbehave. Most issues fall into a handful of categories — power, communication, mechanics, or the credential itself — and a systematic check resolves the large majority without a service call. The checklist below is the one a support engineer works through first. If you are still setting up, start with our smart lock installation and configuration guide; if the lock is already on the door and something has stopped working, read on.
Symptoms at a glance
| Symptom | Likely cause | First fix |
|---|---|---|
| Lock won't unlock | Dead batteries / wrong credential | Replace batteries; verify credential |
| Fast battery drain | High traffic on gateway / jammed bolt | Clear obstruction; reduce poll rate |
| App can't pair | Bluetooth off / phone too far / lock in use | Reset Bluetooth; move within 1 m; retry |
| Gateway offline | Wi-Fi down / power lost | Check router and gateway power |
| Bolt binds or won't extend | Misaligned strike / swollen door | Realign strike; tighten screws |
| Fingerprint fails | Dirty or wet sensor / dry finger | Clean sensor; moisten finger |
| Keypad beeps but no unlock | Deadlocked motor / low battery | Replace batteries; check bolt path |
The lock won't unlock
Start with power. Alkaline batteries fade gradually, but a lock under heavy use can drop below the motor's threshold without warning. Replace all four AAs at once — mixing old and new cells causes one to reverse-charge and leak. If the lock still chirps but the bolt doesn't move, the problem is mechanical, not electrical (see Bolt binds below).
If power is fine, the credential is next. Common culprits: a time-limited code used outside its window, a card that was revoked, or a fingerprint saved under a different finger than the one being tried. Check the app's activity log — if the unlock attempt isn't logged, the lock never saw a valid credential.
Batteries draining fast
A lock should run months on a set of batteries. If you are replacing them every few weeks, something is wrong.
- Check the bolt path. A bolt rubbing against the strike forces the motor to draw peak current on every cycle. Fix the alignment (below) and battery life recovers.
- Review gateway traffic. A lock that talks to the gateway hundreds of times an hour burns power. If the gateway is polling aggressively, reduce the frequency or move the lock to a less chatty mode.
- Watch the weather. In freezing conditions lithium primaries outperform alkalines; alkaline voltage sags and the motor works harder.
- Replace, don't recharge. Most locks use non-rechargeable AAs. Rechargeable cells are 1.2 V each, below the lock's design voltage.
App won't pair
Pairing fails most often for boring reasons. Work through them in order:
- Confirm Bluetooth is on and the phone is within about 1 m of the lock.
- Make sure no one else is mid-pair on the same lock — only one pairing session at a time.
- Forget the lock in the phone's Bluetooth menu, then retry from the app.
- Check that the lock isn't already bound to another admin account. A lock can only have one owner; if it came back from a previous install, it needs a factory reset first.
- Reboot the phone. Bluetooth stacks occasionally wedge.
Gateway offline
When the gateway is offline, remote commands (unlock from anywhere, real-time logs) stop working, but local credentials — cards, fingerprints, codes stored in the lock — keep working.
- Check the gateway's power LED. No LED means a tripped outlet or a failed USB cable.
- Confirm the Wi-Fi network is up and that 2.4 GHz is enabled — most gateways do not join 5 GHz.
- Verify the gateway is still bound to your account and shows the correct network. Re-enter the Wi-Fi password if it has changed.
- Check signal strength. If the gateway moved or a new appliance is causing interference, relocate it closer to the router or the lock.
Hardware and specs for the gateway are listed separately.
Bolt binds or won't extend
A sticking bolt is the single biggest cause of both "lock won't open" complaints and fast battery drain. The strike plate is usually the culprit.
- Extend and retract the bolt with the door open. If it moves freely, the lock is fine and the strike is misaligned.
- Look for rub marks on the bolt or inside the strike — bright metal shows where it's binding.
- File or relocate the strike so the bolt enters the hole cleanly. A half-millimeter of misalignment is enough to jam under load.
- Check for a swollen door. Seasonal humidity shifts wood doors enough to bind a previously clean bolt.
- Tighten all screws on the lock body and the strike; loose screws let the assembly drift.
Fingerprint reader fails
Fingerprint readers are robust but sensitive to conditions:
- Clean the sensor with a dry microfiber cloth. Grease and dust are the most common cause of misreads.
- Try a different finger. Index fingers read better than thumbs; dry winter skin reads worse than summer.
- Breathe on your finger or rub it on your nose — a slightly oily finger reads more reliably than a bone-dry one.
- Re-enrol. If a previously working finger stops reading after a cut or abrasion, delete and re-enroll it, capturing the finger at several angles.
The factory-reset option
A factory reset wipes all credentials and pairing data and returns the lock to its out-of-box state. Reach for it only when:
- You are taking over a lock from a previous owner or install and cannot reach the old admin.
- The lock is in an inconsistent state (app shows one config, lock behaves differently) and a normal sync doesn't resolve it.
- A support technician asks you to, to rule out a software fault.
Before resetting, export or note your current users and codes — you will need to re-enrol everything afterward. The reset procedure varies by model; it is usually a long press of a specific button on the interior body, confirmed by a sequence of beeps.
If you're still stuck
Work through the sections above first — they resolve the large majority of cases. After that, it is worth contacting support when:
- The lock has full power and a clean bolt path but the motor still doesn't move.
- The gateway is powered and on a working network but won't bind to the lock.
- A keypad or fingerprint sensor is physically damaged or unresponsive after a reset.
Capture the lock's model, its firmware version (shown in the app), and a short video of the fault before you reach out — it shortens the exchange dramatically. The contact page is the place to start.
Most smart lock faults trace to one of four things: batteries, alignment, network, or a credential used outside its rules. Check power first, then the bolt path, then the gateway, then the credential itself. Keep a set of fresh batteries and the activity log within reach, and reserve a factory reset for true dead-ends — a few minutes of methodical checking solves most problems without shipping anything back.