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

harry161 — Wed, 04 Mar 2026 23:20:57 GMT

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

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

gg30340 — Thu, 05 Mar 2026 08:17:55 GMT

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.

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

omoor — Thu, 12 Mar 2026 10:04:52 GMT

Hi,

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

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

omoor — Sat, 14 Mar 2026 23:38:51 GMT

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)

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

omoor — Mon, 16 Mar 2026 09:28:04 GMT

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)

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

harry161 — Mon, 16 Mar 2026 09:50:08 GMT

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

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

WSH — Mon, 16 Mar 2026 10:12:32 GMT

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.

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

omoor — Sat, 21 Mar 2026 17:44:39 GMT

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

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

andymerrett2 — Sat, 21 Mar 2026 20:48:14 GMT

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.

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

harry161 — Sat, 21 Mar 2026 21:08:16 GMT

Me neither, I didn’t mark it.

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

gg30340 — Sat, 21 Mar 2026 21:21:47 GMT

It was marked as the solution by a moderator.

I have unmarked it.

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

omoor — Mon, 23 Mar 2026 22:39:20 GMT

The new hub appears to be working perfectly so far. It has been connected for 2 days, 7 hours, and 34 minutes without any issues.

It is running a different firmware version, which may indicate that BT has delayed rolling out the newer firmware. The current version installed is:
v0.46.02.10311-BT

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

harry161 — Mon, 23 Mar 2026 23:05:40 GMT

Thanks, I will try to get a new hub too!

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

WSH — Tue, 24 Mar 2026 09:53:00 GMT

@omoor

Yes, that's the firmware version I've been running since early December.

The implication would appear to be that v0.46.02.42261-BT was a revision that has caused a problem and so been withdrawn.

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

harry161 — Tue, 24 Mar 2026 10:16:57 GMT

@omoorHow did you talk to a representative through live chat? It only let me select a few options and then asked me to call.

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

Quesada — Tue, 24 Mar 2026 10:32:46 GMT

I have had the same issue for quite some time, on an almost daily basis. My Hub has been replaced twice.

Recently I have been receiving this online report, which implies that the reboot is being caused by a loss of light signal to my ONT.

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

omoor — Tue, 24 Mar 2026 11:05:21 GMT

Hi all,

Regarding Live Chat, I believe there was an option for Full Fibre, followed by a Talk to an Agent option.

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

harry161 — Tue, 24 Mar 2026 11:43:48 GMT

@omoorThanks very much. Could you help me find the option? I’ve been struggling with it, and the phone call didn’t work either.

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

Leanne_T — Tue, 24 Mar 2026 16:54:07 GMT

Hi @harry161

Thanks for coming back to the community.

You can find ways to contact our tech guides on the get in touch page, this includes an option to message us or call and the team will be happy to help.

Leanne.

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

omoor — Tue, 24 Mar 2026 17:26:13 GMT

Yeah , it gave me the option to message a BT Guide, through the Live chat.