Red light on hub three

Hello there, I wonder if anyone can help. 

I have a three router and I am continually having to turn the power off and allow it to cool down. It has a red light on constantly. I have performed all the instructions that I have come across in previous post and had a chat with one of the virgin representatives.

This is included doing a hard reset and a pinhole push for 30 seconds.

I find this sometimes resolves the problem for a number of days and then it repeats the same issue and the Wi-Fi drops. 

The router is well ventilated and vertical but has a constant red light on it is not particularly hot to touch.

Any advice or direct message from virgin media representative would be greatly appreciated. Looking on previous posts of the same manner it seems the hub may be faulty and require replacement.

Many thanks