U400 Bluetooth issue connecting with Aqara App

Aqara Products
,
1

I have three of these locks, all paired to my Thread border router (an Apple TV 4K). UWB works on all three. I’ve also paired each lock via Bluetooth in the Aqara app.

When I’m near the locks, I can open the Aqara app and connect to manage two of them without any issues. However, one of the three will not connect locally over Bluetooth in the app.

I’ve reset that lock multiple times and re-paired it, but the issue persists.

Has anyone else experienced this? If so, did you end up working with Aqara support to get a replacement?

For reference:
Lock not working
• Firmware: 3.1.0.4
• Production date: 11/2025

Locks working
• Firmware: 3.1.0.4
• Production date: 01/2026 and 12/2025

2

I would definitely contact support as this information could help them track down the issue in case it’s from a bad run or something. The dates being a potential tell.

Assuming you have an iphone, when you stand near the lock and look in your phone’s bluetooth settings do you see the lock in the list?

5

Hi there, as this issue has already been resolved with our support team via email, we’ll be closing this topic on the forum as well. If you have any further questions or run into any other issues, please feel free to reply directly to our support email. Thanks for your support and understanding!