12 Eufy Smart Lock Problems and How to Fix Them

Begin by checking the battery: charge or swap it out, then stand roughly 3 feet (1 m) from the lock with your phone and attempt it once more. When a Eufy smart lock refuses to lock, unlock, or connect, the first thing to check is the battery level.

When your lock functions properly but fails to secure itself automatically, the reason is straightforward: auto-lock comes disabled by default on Eufy locks, while the maximum delay setting varies according to your specific model. While troubleshooting, keep your key, fingerprint or passcode on hand, so you’re never locked out by a failed test.

Start with the easiest, least risky fixes and work up to the most technical: battery first, then Bluetooth and phone, firmware, calibration, restart, and only after that reset and re-pair. Eufy offers numerous models (C34/E30, E31, E32, E34/E35 FamiLock, S3, S330, E330, C210, C220, Touch & Wi-Fi and the Video Smart Lock), and since the procedures vary across them, each entry indicates which model it applies to when relevant.

1. Eufy Smart Lock Battery Is Low

When the battery gets weak, the lock can feel laggy or stop reacting, sometimes leaving the deadbolt unmoved. The effect is stronger on the Video Smart Lock: once battery drops under 5%, remote lock/unlock and video motion detection cease working, and the lock goes offline.

1. Check the battery level against the lock by opening the Anker eufy app.
2. Recharge the battery or swap it out. The Video Smart Lock runs on a removable rechargeable battery pack: remove the pack, charge it, and reinstall it. For other models, swap out the batteries following the instructions in your model’s manual.
3. Operate the door with your key, fingerprint, or passcode when the battery is removed or being charged.
4. After the lock is powered up, unlock and lock it using the app.

Once repaired, the lock responds to the app in a few seconds, and a Video Smart Lock appears online again. When the battery is full but it still fails, move on to the next entry.

2. Eufy Smart Lock Won’t Connect Over Bluetooth

Eufy identifies four reasons a lock might not link to your phone via Bluetooth: the battery being low, the phone being over roughly 3 feet (1 m) away, Bluetooth being disabled, or “Location Services” being off on an Android device.

1. First, check the battery (entry 1).
2. Position yourself next to the lock, keeping your phone within about 3 feet (1 m).
3. Switch Bluetooth on in your smartphones settings.
4. On an Android phone, activate “Location Services”.
5. Fully quit the Anker eufy app, then launch it again.
6. Power cycle the lock. On the C210, hit the button at the base of the lock, adjacent to the micro USB port. Other models have different restart methods, and the Video Smart Lock restarts when you reinstall its battery (see entry 9).

After being fixed, the app locates the lock and displays its status rather than a connection error.

3. Eufy Smart Lock Won’t Auto-Lock

Auto-lock is off by default, so a new lock never locks itself until you turn it on. If you already did, the delay you selected or a door that fails to shut completely becomes the next suspect.

YouTube · Tech StratologyHow to Fix Eufy Smart Lock Auto-Lock Not Working – Auto-Relock Settings, Calibration & Fix1:50

1. Launch the Anker eufy app and access the device details for your lock.
2. Press “Settings,” then “Auto Lock,” and activate it.
3. Select a timer duration. Delays range from 1 second to your model’s maximum, in 30-second increments.
4. Make certain the door shuts completely and stays free of any obstruction.
5. Run through the complete cycle: unlock the door, open it, shut it, then let the delay elapse.
6. If the lock still refuses to lock, update the firmware (entry 7) and calibrate the lock (entry 8).

Maximum delay per model:

Once fixed, the bolt extends by itself when the delay ends, and the app shows the door as locked.

4. Eufy Smart Lock Locks While the Door Is Open

Eufy locks operate in one of two auto-lock modes. Automatic Locking uses door position detection: its timer starts after the lock senses that you unlocked, opened, then closed the door. Timed Locking lacks door detection and begins its timer with each unlock, allowing the bolt to extend while the door remains open.

1. See which mode your model uses in Eufy’s auto-lock guide (new tab).
2. With Timed Locking, choose a delay that gives you enough time to walk through and shut the door. Entry 3 in the table lists the maximum for your model.
3. When using Automatic Locking, ensure the door shuts completely and that no obstruction is in its path. Then set the lock’s calibration (entry 8) and test unlock, open, close.
4. When the lock engages after several minutes with the door open every time, see entry 10.

After the repair, the lock holds off until the door shuts (Automatic Locking) or gives you enough time to shut it (Timed Locking).

5. Eufy Video Smart Lock Shows Offline

Eufy’s own list gives four reasons why a Video Smart Lock might show as offline: the battery is under 5%, the Wi-Fi Bridge is disconnected from your router, router settings like a firewall are interfering, or the firmware is outdated. If the Wi-Fi Bridge shows a red LED, it has no internet connection, and a router firewall could be the cause.

1. Charge the battery (entry 1). Once the battery dips under 5%, the lock disconnects and remote lock/unlock no longer works.
2. Check the LED on the Wi-Fi Bridge. Should the LED appear red, verify that another device can access your home internet.
3. Should your internet be functioning while the LED remains red, examine the firewall or security configuration on your router, as these settings might be preventing the bridge from connecting. Jot down each adjustment you make, so you can restore it later.
4. Upgrade the firmware of your lock (entry 7).

The Wi-Fi Bridge is not the same device as a eufy HomeBase. Should the HomeBase be the device having trouble, see Eufy HomeBase problems. When the app itself displays an error message, Eufy app “Failed to request” errors covers those cases.

After the repair, the Wi-Fi Bridge LED stops showing red, and the lock appears online in the app.

6. Eufy Smart Lock Time Zone Mismatch Breaks Timed Lock or Schedules

When a timed lock or schedule fails, Eufy asks you to verify that your phone and the lock are set to the same time zone and that the firmware is up to date. Shifts for daylight saving time can also cause the lock to be off by an hour.

1. On your phone, enable the automatic date, time and time zone setting.
2. While you are near the lock, launch the Anker eufy app and verify that the time settings for the lock match your phone, if your model displays them.
3. Install the firmware update (entry 7), since it also delivers daylight saving time revisions.
4. Run your schedule once more when you’re able to observe it.

Once fixed, the lock follows your schedule at the correct time.

7. Eufy Smart Lock Firmware Is Out of Date

Eufy identifies outdated firmware as a reason for locks going offline, auto-lock issues and scheduling issues. Refresh it before you recalibrate or reset anything.

1. With Bluetooth enabled, position yourself close to the lock and confirm the battery charge is adequate.
2. Open the Anker eufy app and open your lock.
3. Press “Settings” then “Firmware update.”
4. When an update becomes available, begin the process and don’t disturb the lock until it completes.

App versions may have slightly different menu names. If you don’t see “Firmware update,” look in the lock’s “Settings” for an update option.

After the repair, the app indicates the firmware is current.

8. Eufy Smart Lock Deadbolt Stuck During Calibration

Calibration shows the lock the points where its bolt begins and ends. A lock that has lost its calibration might misreport its status or fail to lock automatically, and the bolt may jam if the door or strike plate obstructs it. Eufy’s procedure for the C34/E30 is presented in Steps 1 and 2 below. Other models offer a comparable “Lock calibration” feature within “Settings.”

1. Remain indoors with the door completely shut. During calibration the bolt shifts, so make sure you keep your fingers away from it.
2. Launch the Anker eufy app and select “Lock Settings” › “Lock Calibration,” then tap “Calibrate the Lock.”
3. Stop if the bolt jams halfway. Use your key or the inside thumb turn to open the door and move the bolt. Avoid forcing it.
4. Should the bolt catch solely upon shutting the door, verify complete closure, ensure no obstructions are present, and confirm alignment between the bolt and the strike plate hole.
5. Check the battery (entry 1), update the firmware (entry 7), and calibrate again afterward.

Once repaired, the bolt extends completely and retracts completely, while the app displays locked and unlocked correctly.

9. Eufy Smart Lock Deadbolt Is Stuck

When the app shows unlocked yet the deadbolt refuses to budge, or if the bolt remains in the locked position, the typical culprits are a low battery, lost calibration, or a bolt held by a door that doesn’t line up.

1. Verify the battery (entry 1).
2. Try your key or the inside thumb turn with the door open. If the lock moves easily, it is not jammed. If the bolt resists, don’t force it, since it may be binding on the strike plate.
3. Calibrate the lock (entry 8).
4. Reboot the lock. On the C210, push the button located on the bottom beside the micro USB port. On the Video Smart Lock, remove the battery, wait a few seconds and reinsert it. According to Eufy, reinstalling the battery triggers the lock to reboot.

After it’s fixed, the bolt responds to each app command, and the app state reflects the bolt’s actions.

10. Eufy Smart Lock Keeps Losing Calibration

In a Eufy community thread, users report a lock that loses calibration after a few cycles and engages after several minutes with the door open. The person who started the thread suspects a faulty open/close sensor, and the thread reports no confirmed fix. Per Eufy’s guidance, abnormal operation persisting after calibration on a lock can point to a fault in the sensor or the main circuit board connection.

1. Ensure the door shuts completely and check that nothing is obstructing it.
2. Refresh the firmware (entry 7) and then recalibrate the lock (entry 8).
3. Run the full test: unlock, open, close, then wait. Watch how quickly the lock responds.
4. Film a brief clip of the lock acting up.
5. In the Anker eufy app, select “Settings” › “About” › “Upload log.”
6. Send the video to Eufy support (details at the end of this article) and let them know you uploaded the logs.

Don’t open the lock’s housing to look at the circuit board. After you upload the logs, support can look into the issue with you.

11. Eufy Smart Lock Still Not Working: Reset and Re-Pair

Only after the battery, Bluetooth, firmware, calibration and restart have failed should you try a reset.

1. Locate the reset instructions for your specific model on Eufy’s support site. The specific button and required hold time vary from model to model, meaning a sequence effective on one device may have no effect on a different one.
2. Follow the steps provided by the model to reset the lock.
3. In the Anker eufy app, delete the old lock entry if it is still listed, then add the lock again by following the app’s instructions while your phone is next to the lock.
4. Calibrate the lock (entry 8), then verify that “Auto Lock” is enabled, as it is disabled by default.

After being fixed, the lock appears as a new device, responds to the app, and retains your auto-lock setting.

12. How to Remove a Eufy Smart Lock

This step is only necessary if you’re swapping out a defective lock or transferring it to a different door. To remove the lock, simply reverse the installation process. If you have it, consult your model’s installation guide.

1. Before selling or giving the lock away, first remove it from your Anker eufy account in the app.
2. Go to Eufy’s support site to get the user guide or install guide for your model, then follow its steps in reverse order. The sequence of the battery, screws, cable and parts varies by model.

When finished, the door has a clear opening and the components come off without forcing anything.

Frequently Asked Questions

Should I use my key or passcode while I troubleshoot?

Yes. After calibration, restarts, or resets, the lock may be unresponsive temporarily, so have your key, fingerprint, or passcode ready and remain inside or near the door throughout each test.

Why does my Eufy lock work over Bluetooth but not from far away?

Bluetooth works only at close range. Eufy’s general Bluetooth guide says to stay within about 3 feet (1 m), and the C210 guide allows up to 30 feet (9 m). Controlling the lock from somewhere else requires internet access, and on certain models that connection runs through a Wi-Fi Bridge, so verify both that bridge and your home internet.

Why are my Eufy lock and my Eufy cameras offline at the same time?

When devices go offline simultaneously, they typically have a common source, like your router or home internet. Check your Wi-Fi on another device, restart your router, and see Eufy camera problems for the camera side.

Will the lock move by itself when I calibrate it?

Yes. During calibration the deadbolt extends and retracts, so remain indoors with the door completely shut and keep your hands away from the mechanism. When it finishes, check the bolt position.

Written with AI assistance. Facts and sources are checked automatically before publication. How we work