Router not broadcasting 5GHz signal

[vorman]

So my Belkin router has been set up with dual band Wi-Fi broadcast.
Some devices have been connecting to the 5Ghz and others to the normal 2.4Ghz.

These past few days I have noticed that the 5GHz disappears all of a sudden and cannot be picked up on any of the devices. If I go to the router home page, the setting for broadcasting the SSD is on. If I restart, it usually shows up again.
I have left these settings on default for the 5GHz Wifi-network:
Wireless Channel: Auto
Extension Channel: 40(5 for 2.4Ghz)
Bandwith: 20/40MHz

I did do a factory reset 2 weeks ago. Didn't have a problem before, makes me think these settings were different. Don't want to change stuff around if i don't know what I'm changing. What would you recommend for these settings?

 

[Kloofvreter]

Perhaps set the channel width to 20Mhz and see if it works.

 

[WAslayer]

Install a WiFi anaylyzer app on your phone.. A good one would be able to scan for all 2.4 and 5GHz signals and tell you which channels each one are on.. It may be that a someone close by bought a new router and it is on the same channel as yours and interference is enough for yours to not be picked up..

You will then need to change to a channel width that is the least congested for best experience..

 

[vorman]

Install a WiFi anaylyzer app on your phone.. A good one would be able to scan for all 2.4 and 5GHz signals and tell you which channels each one are on.. It may be that a someone close by bought a new router and it is on the same channel as yours and interference is enough for yours to not be picked up..

You will then need to change to a channel width that is the least congested for best experience..

Many thanks. Did do that after some googling. No other networks on 5Ghz. But I changed the channel so will see if it happens in a few days time again. I also connected to the 2ghz in case so will manually have to check every now and then. The first time it happened I didn't even realise I was not connected to Wi-Fi. Ended up finishing my data.