BT Hub rebooting itself roughly every 3 days (log shows “System start Button press (PowerButton)”)

[harry161]

Hi everyone,

I’ve noticed that my BT Hub appears to be rebooting itself roughly every three days, and I’m trying to understand why.

For example, on 4 March at around 22:33, the router restarted and the system log shows the following entries:

22:33:56 – System start Button press (PowerButton)
22:33:56 – Booting firmware v0.46.02.42261-BT
22:33:56 – System up

Immediately afterwards, all devices on my network reconnect and request DHCP leases again, which causes brief interruptions to services on my network.

This is not a one-off event. I have observed similar reboots before 27 February, and then again on 27 February, 1 March, and 4 March, so it seems to be happening roughly every three days.

The router is connected to a stable power source and no one is pressing the power button, so the log message is a bit confusing. I’m wondering whether this could be caused by a firmware issue, an automatic maintenance reboot, a watchdog restart, or possibly a hardware fault.

The current firmware version is v0.46.02.42261-BT.

Has anyone seen similar behaviour with their BT Hub, or knows whether these routers perform periodic automatic restarts?

Thanks in advance for any advice.

Harry

[gg30340]

It may be having a problem trying to install an update. Try a factory reset of your BT hub by pressing the recessed button on the rear for about 30 seconds. 

[omoor]

Hi,

Been having the same issues seems to be restarting every 3 days, just done a factory reset, to see if make a difference. 

[omoor]

Hi Again,

Ours still doing it , restart at 2:10am in morning:

02:10:44, 14 Mar.

Booting firmware v0.46.02.42261-BT (Fri Dec 26 15:42:12 2025)

02:10:44, 14 Mar.

System start Button press (PowerButton)

[omoor]

Hi Everyone,

Still doing it after the factory reset of the hub, what best thing can do get this sorted, is bug with this firmware causing it?

09:23:02	16 Mar. admin login success from 192.168.1.157
04:36:52	16 Mar. Booting firmware v0.46.02.42261-BT (Fri Dec 26 15:42:12 2025)
04:36:52	16 Mar. System start Button press (PowerButton)
02:10:47	14 Mar. Booting firmware v0.46.02.42261-BT (Fri Dec 26 15:42:12 2025)
02:10:47	14 Mar. System start Button press (PowerButton)
09:49:22	12 Mar. Booting firmware v0.46.02.42261-BT (Fri Dec 26 15:42:12 2025)
09:49:18	12 Mar. System start Button press (ResetButton)

[harry161]

Hi, I am still experiencing the issue after the reset. The firmware version also did not change after the factory reset.

[WSH]

Might be a failing power supply unit, but if it is exactly every 3 days that would seem to suggest something more sophisticated.

Phone customer services and ask for a replacement router.

[omoor]

Been in a BT Live chat, managed to get replacement router, which is now installed, awaiting to see how this one goes.

[andymerrett2]

I don’t understand why a response was marked as a solution when it hasn’t resolved the issue raised for at least one person. 

[harry161]

Me neither, I didn’t mark it.