I've been on the phone with support several times over the last few weeks as we keep losing the internet connection. Over the last few days it has been up and down every few minutes to the point of being almost unusable.
Hub 3 is in modem mode and I thought the large light at the bottom was red (though it could be magenta). No other lights are on after it boots up.
Telephone support have said they will post a new Hub as this one is overheating, but having now read some previous posts I'm not convinced that is the problem. Nobody seems to have looked to diagnose the issue, just gone by my initial perception that the light is red.
The Hub was on the floor, plenty of space around it and the room air temp was 20.7 C. It didn't feel more than slightly warm to the touch. I have moved it closer to a window where it will be a few degrees cooler and left it powered down for an hour, but after turning back on it's back with the same light on.
At the moment the internet connection is working, but I'm concerned if it's not an overheating issue and happens again then a replacement modem won't help. It will take a week to arrive and the kids will need access before then as they all have to school from home for the first few weeks of the new term. Is there any diagnosis or logs etc than can be checked to confirm the underlying cause?