Smart home devices

Smart lock won't lock or unlock remotely

Usually a mechanical misalignment, weak batteries, or the door not fully closed so the lock can't engage. Check the door alignment first since it's the most overlooked cause.

Difficulty
Moderate
Time
15–30 minutes
DIY cost
$5–$20
Pro cost
$80–$150

Symptoms

  • App command times out or shows an error
  • Lock motor runs but the bolt doesn't fully engage
  • Works manually by hand but not through the app
  • Works when door is open but not when actually closed

Likely causes

  • CommonDoor not closing squarely, misaligning the bolt and strike plateEven slight door sag or a swollen frame can prevent the bolt from freely extending, causing the motor to jam or stop.
  • CommonWeak batteries unable to supply enough current to the motorA motorized bolt draws significant current; weak batteries can cause it to stall partway.
  • PossibleLock connection to Wi-Fi/hub is unstable, delaying or dropping commandsAn intermittent connection can cause remote commands to fail even though the lock itself is fine.
  • PossibleDeadbolt or lock body needs lubricationA dry or dirty bolt mechanism can bind and stall the motor over time.
  • Less commonLock motor or gearing has failedAfter years of use, the internal motor mechanism can wear out.

What to do

  1. Close the door and check if the deadbolt can be locked easily by hand; if it's stiff, the door alignment is the likely cause.
  2. Replace the batteries with fresh ones even if the app doesn't show them as critically low.
  3. Check the strike plate position and adjust or file it slightly if the bolt rubs against it.
  4. Apply a small amount of graphite or silicone-based lubricant to the bolt mechanism, avoiding oil-based products that attract dirt.
  5. Test locking manually by hand first, then via the app, to isolate whether it's mechanical or connectivity.
  6. Confirm the lock shows a stable, strong connection in the app before testing remote commands.
  7. Contact the manufacturer if the motor consistently stalls even with fresh batteries and a properly aligned door.

Tools and parts

  • Graphite or silicone lubricant
  • Screwdriver
Smart lock batteriesSearch: “smart lock batteries”

When to call a pro

If the door frame itself needs adjustment or the deadbolt mechanism is failing, a locksmith or handyman can realign the strike plate or replace the hardware.

Safety

Generally low risk

Generally low risk for a careful person. Stop if anything looks different from what this guide describes.

Related guides

Operator provides AI-generated troubleshooting information. It can be wrong. For safety-critical, electrical, gas, structural, medical, automotive safety, or other high-risk problems, consult a qualified professional.