LOS light is red

[Toni65]

LOS light is red and wifi not working 

[FML]

Mine too.......there's a pinned post about scheduled maintenance between 12 & 7am from the morning of the 26th but it doesn't specify which date just says time to time - maybe that's the issue ? 

[HazBear]

Im guessing its the maintenance, nice of them to give a date it would be happening

[CSD82]

Must be maintenance as mine is red too. It'd be too coincidental if not that.

[Daniel0210]

If you have broadband issues between midnight and 0700 it’s likely to be essential overnight maintenance taking place which is carried out then to minimise disruption. There’s no pre-warning of this. That pinned post is for any night and isn't specific to one night. 
https://helpforum.sky.com/t5/Broadband/Important-Notice-Scheduled-Broadband-Maintenance/td-p/5151847...

If you have an ONT box displaying a red light, see this further advice…
https://helpforum.sky.com/t5/Broadband-Talk/Can-t-connect-to-broadband-and-have-a-red-light-on-your-...

[Chrisee]

@HazBear the issue is simply Openreach who operate the network dont tell their customers the ISPs when they are taking down an OLT thst generates the optical signal for work. Each node on an OLT supports up to 30 lines who could be customers of any ISP selling Openreach connections. If a whole unit requires an update then you may have a few hundred Sky customers affected. Each of the over 1,000 digital exchanges have multiple OLT units. To give advanced notice to the customers affected would be administratively complex  and expensive and given the vast majority of the domestic customers are asleep largly pointless.