- Auto-lock feature disabled in app settings
- Door position sensor not calibrated
- Door not fully closed when auto-lock triggers
Problem Description
Your eufy smart lock auto-lock is not working. The door should lock automatically after a set time period but stays unlocked. You leave the house thinking it locked behind you but come home to find the door unlocked. Auto-lock relies on the lock knowing the door is closed and some eufy models use a sensor that must be properly calibrated.
Symptoms
- Door stays unlocked after auto-lock timer expires
- Auto-lock works sometimes but not always
- Lock makes motor sound but does not fully lock
- Auto-lock setting is on but nothing happens
- Lock auto-locks when door is still open
- Auto-lock delay timer seems inconsistent
Recognize these? Here's what usually causes it.
Common Causes
- Auto-lock feature disabled in app settings
- Door position sensor not calibrated
- Door not fully closed when auto-lock triggers
- Lock motor struggling with misaligned deadbolt
- Battery too low for auto-lock function
- Lock firmware bug affecting auto-lock timing
Most fixes happen in the first 3 steps.
Auto-lock can lock you out if you step outside without your phone or key. Always carry a backup method of entry when relying on auto-lock.
Tools & Requirements
These tools will help you complete this fix.

Door alignment tool
Door Latch Strike Plate, Stainless Steel Door Lock P...

Replacement batteries
Energizer Ultimate Lithium AA Batteries, Long Lastin...

Screwdriver
STREBITO 155 in 1 Electric Screwdriver Set, Small El...
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Step-by-Step Solution
Verify Auto-Lock is Enabled
Open the eufy Security app and tap your lock. Go to Settings then Auto-Lock. Ensure it is toggled on and set your desired delay time. Common options are 15 seconds 30 seconds or 1 minute. If auto-lock was disabled by a firmware update you need to re-enable it manually.
Calibrate Door Sensor
Some eufy locks have a built-in door sensor that detects if the door is open or closed. Auto-lock only triggers when the door is sensed as closed. In lock settings run the door sensor calibration. Close the door fully then follow the app prompts to calibrate. If calibration fails the sensor magnet alignment may need adjustment.

Needed for this step
Door Latch Strike Plate, Stainless Steel Door L...
$7.49Check Door Alignment
With the door open try locking the deadbolt using the app. If the bolt extends smoothly alignment is fine. If the motor strains or the bolt does not fully extend the strike plate hole is too small or misaligned. File the strike plate opening until the bolt slides in smoothly. A struggling motor may timeout and cancel the auto-lock.
Check Battery Level
Low batteries can cause the lock to skip auto-lock to conserve power. Check battery level in the app. If below 30 percent replace with fresh batteries. The auto-lock motor cycle requires more power than a single manual lock so weak batteries fail auto-lock first.

Needed for this step
Energizer Ultimate Lithium AA Batteries, Long L...
$83.98Update Firmware
In eufy Security app go to lock Settings then check for firmware updates. eufy has released fixes for auto-lock timing bugs. Update the firmware and retest. After updating power cycle the lock by removing and reinserting batteries.
Quick Solutions
Still having issues? This is usually the deeper cause below.
If the keypad rejects valid codes, a lockout timer may be running — five failed entries locks most keypads silently for 5–10 minutes.
Set auto-lock to 30 seconds as a balance between convenience and security. Too short like 5 seconds and the lock may engage while you are still moving through the doorway.
Most smart lock failures people label as hardware issues turn out to be a code wiped during a sync, or a setting reset nobody remembers triggering.
- Auto-lock feature disabled in app settings
- Door position sensor not calibrated
- Door not fully closed when auto-lock triggers
- Lock motor struggling with misaligned deadbolt
- Battery too low for auto-lock function
Before you go — try one of these (they fix most cases).
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Official Manufacturer Manual
If you need the complete manufacturer documentation for advanced setup, wiring diagrams, or detailed specifications, you can download the official manual below. The manual includes full technical instructions directly from the manufacturer and may help if your issue requires deeper troubleshooting.
Download the Official eufy Smart Lock ManualSource: eufylife.com
Need More Help? eufy Security Support
Note: The contact information below connects you directly to eufy Security's official customer support team, not Trunetto. They can help with warranty claims, device replacements, and advanced technical issues.
How Does eufy Security Compare?
Before replacing your eufy Security device, see how it stacks up against alternatives in our full comparison guides.




