6x GE Smart Fan Switch will not pair with replacement hub

[jkp]

Any chance you are using a custom device handler? If yes, have you tried opening the device handler in IDE and save/publish for me again?

There is also a thread on not being able to add a-wave devices worth checking out if the above does not resolve your issue

Hub will not pair any new devices

This! I had this happen this weekend. I could not pair a device at all but was able to general exclude it without issue. Eventually caught in the hub logs that a device was pairing but no device was being created. If this happens to you - grab the DNI in the hub log. Create a new device using the same DNI and assign the proper DTH. Worked for me.