My Hub 3.0 has a solid red light and we've noticed we no longer get consistent WiFi in areas of the house we used too (and often no WiFi).
The hub is in a well ventilated area, it's dusted down regularly and actually feels cool to touch despite the troubleshooting info stating the solid red line means it's overheating. I've tried the troubleshooting settings, resetting etc. and the issue hasn't been fixed.
We've had this router, at least for 4 years but I've been with Virgin media longer than that (paused the account between house moves) and I am pretty sure we have the same router that we had before, I don't think they sent us a new one when we moved. Given it's reasonably old though I am unsure whether this needs replacing or whether I should just get WiFi boosters? I've seen the other posts with similar issues and generally the answer seems to be it needs replacing, I see no reason why this would be different but given it doesn't actually feel hot to touch I wanted to double check with my own post!
Appreciate any initial thoughts (and hardware recommendations if you think WiFi boosters will be useful) and thanks in advance.