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Smart Lock Firmware Update Stuck Alexa: Troubleshooting Guide

ByAlex Turner

If your smart lock’s firmware update is stuck while it’s connected to Alexa, the most common cause is a weak or interrupted Wi‑Fi connection between the lock, your router, and the Alexa device. Before you try anything else, check the lock’s battery level and reboot the lock by removing and reinserting its batteries. That alone clears many stalled updates. If the issue persists, follow the steps below to isolate the problem and get the firmware installed.

Quick Checks Before You Start Fixing

Use this checklist to rule out the easiest causes before diving into detailed troubleshooting. Each item is a pass/fail check you can do in under a minute.

Check What to look for Pass if…
Battery voltage Lock shows low battery in the app or audible low‑battery chirps Battery level is at least 30% (or full bars in the app)
Wi‑Fi signal strength Lock’s app reports “weak signal” or “connection lost” Signal is “good” or “excellent” on the same network as your Alexa device
Alexa device proximity Echo or Dot is within 30 feet of the lock (line of sight) Alexa “discovers” the lock and responds to voice commands reliably
Lock not in use Door is closed and no one is operating the lock during the update Lock is idle and the door is firmly shut (do not open/close during update)
Router hasn’t recently rebooted Router uptime > 10 minutes, no new firmware pushed by ISP Router has been stable for at least 15 minutes without a restart
App version is current Smart lock manufacturer’s app (e.g., Philips Home Access, Kwikset app) has no pending update App version matches the latest on Google Play or Apple App Store

If all checks pass, proceed to the fixes below. If any check fails, correct it first—then try the firmware update again.

Why the Firmware Update Gets Stuck

Smart lock firmware updates are delivered over Wi‑Fi or through an intermediary hub (Zigbee, Z‑Wave, or Matter). When Alexa is in the loop, the update has to pass through several layers:

1. The lock downloads the firmware package from the manufacturer’s cloud.

2. The lock applies the update while staying connected to the same network.

3. Alexa re‑syncs with the lock after the update finishes.

If any of these steps loses connection—due to a brief power outage, a 2.4 GHz vs. 5 GHz mismatch, or a lock that briefly drops off the network—the update stalls. Many smart locks, including the Philips Wi‑Fi Door Lock and the Kwikset HomeConnect 918, use different update mechanisms (Wi‑Fi direct vs. Z‑Wave hub), but the same root causes apply.

Wi‑Fi Band Confusion

Many smart locks operate only on the 2.4 GHz band. If your router uses the same SSID for both 2.4 GHz and 5 GHz (a “band‑steering” setup), the lock may briefly hop to 5 GHz or get confused during the update handshake. As a preventive measure, temporarily disable the 5 GHz broadcast on your router, or create a dedicated 2.4 GHz SSID just for the lock. This step alone has solved many “stuck at 99%” scenarios reported in support forums.

Step‑by‑Step Fixes to Try

Work through these ordered steps. Stop after each and check whether the update completes.

1. Force a Lock Reboot (No Factory Reset)

Why it works: A reboot clears the lock’s temporary memory and re‑establishes the network connection without losing settings.
How to do it:

  • Remove all batteries from the lock (or disconnect the USB power cable if it’s hardwired).
  • Wait 30 seconds.
  • Reinsert the batteries and wait for the lock to boot (usually 10–30 seconds).
  • Open the manufacturer’s app and check if the firmware update resumes or if the lock shows “update failed” (which is a safe state to retry).

Checkpoint: If the lock now shows an “Update Available” notification, tap it and let it run without opening the door.

2. Power Cycle Your Wi‑Fi Router and Alexa Device

Why it works: Routers can develop stale DHCP leases or ARP caches that confuse the lock’s connection. Alexa devices also cache network credentials.
How to do it:

  • Unplug your router and wait 60 seconds.
  • While the router is off, unplug your Amazon Echo / Echo Dot / Echo Show.
  • Plug the router back in and wait until all lights show normal operation (usually 2–3 minutes).
  • Plug the Alexa device back in and wait until it reconnects to the network (about 1 minute).
  • Before retrying the update, ensure the lock’s app shows it is connected to the same 2.4 GHz network. If your router uses band steering, temporarily rename the 2.4 GHz SSID to something distinct (e.g., “Home\WiFi\2G”) and reconnect the lock.

Checkpoint: After the reboot, the lock app should report a stable connection. If the update still doesn’t start, move to step 3.

3. Update via the App Only (Temporarily Disconnect Alexa)

Why it works: Some Alexa routines or voice interactions can interfere with the lock’s update process by polling it during the install.
How to do it:

  • In the Alexa app, go to Devices > All Devices, find your lock, and tap “Delete” (disable the skill). This removes Alexa’s access to the lock temporarily.
  • Open the lock manufacturer’s app.
  • Initiate the firmware update again.
  • Wait 10 minutes—do not operate the lock.
  • Once the update completes (the lock’s status shows the new firmware version), re‑enable the Alexa skill and run “Discover Devices.”

Checkpoint: If the update finishes, reconnecting Alexa is safe. If it still freezes, the problem is not Alexa‑related.

4. Factory Reset the Lock (Last Resort)

Why it works: A factory reset clears any corrupted firmware data that prevents the update from applying.
Important: This erases all user codes, schedules, and Wi‑Fi credentials. You will need to rejoin the lock to your network and re‑add it to Alexa.
How to do it:

  • Refer to your lock’s manual for the exact reset procedure (common methods: press and hold a reset button for 10 seconds, or remove batteries and hold the lock button while reinserting batteries).
  • After reset, the lock should boot into setup mode (LED blinks quickly).
  • Use the manufacturer’s app to set up the lock again as a new device.
  • Immediately check for a firmware update in the app—install it before adding any users.
  • Finally, add the lock to Alexa via the skill.

Checkpoint: If the update still fails after a factory reset, the lock likely has a hardware problem or corrupted flash memory. Contact support.

Escalation: When to Contact Support

Stop troubleshooting and reach out to the lock manufacturer or Alexa support if:

  • The lock is completely unresponsive (no lights, no beeps) after a factory reset.
  • The lock repeatedly shows “Update failed – error code 0x…” and the code isn’t listed in the manual.
  • The lock’s motor whirs but the deadbolt doesn’t move, or it jams halfway during the update.
  • The lock has visible damage (cracked casing, water ingress, burnt smell).

For locks still under warranty, email support with the error code and a photo of the lock’s status LED pattern. Most manufacturers will send a replacement unit if hardware failure is confirmed.

Once the update is complete, verify the new firmware version in the lock’s app and test Alexa voice commands (e.g., “Alexa, lock the front door”). If the lock responds correctly, the issue is fully resolved.

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