Internet goes away in 2.4Ghz a few times a day

Aashrex wrote:

I have a AC1750 wifi router

AC1750 is a speed rating - can you give us the actual model?

Do you know for certain that the drop is only in the 2.4 ghz band?  Or is it possible that it effects 5 ghz, and maybe even ethernet?

What firmware are you on? 

What fixes the issue? 

Have you tried changing wifi channels?

What actual router is it? Like StephenB​ says, you listed the speed, not the model. 

Tried the old factory reset/reinstall option? 

You should either downgrade or upgrade the firmware to a different version of firmware your router has. I've had routers be a little buggy with certain firmwares and once you change it, it begins working better.

This is usually 2.4 GHz interference or the radio resetting under load (very common on older AC1750 units). Try locking the channel to 1, 6, or 11, set bandwidth to 20 MHz only, and disable Smart Connect if enabled. If it still drops, it’s likely aging hardware and the 2.4 radio is starting to fail.

If the problems happen several months apart, I'd either reboot it once a month or reboot it whenever the issue occurs. That router is pretty old and several generations behind. So you can milk it along a bit, but I wouldn't invest any $ in repairing or parts for it. I'd keep it working for a bit while saving up for a newer one. 

To recover your login password, you can try the password recovery feature. If you didn't set it up, it'll still ask you the questions, but there won't be a correct response. If that's the case, you'd need to factory reset to get back in. 

You can try downgrading firmware and see if it helps out cause most likely there isn't any new firmware for an AC1750 nowadays.