Pairing Sky unit via IOS App

HI All,

Over the xmas holidays my Sky unit (station ID 5073) wind and UV sensors appear to fail intermittingly.

Irrespective of how many times I reboot it sometimes all sensors will be Good or it may show wind failed or UV failed or a combination.

I have tried to pair it again as per troubleshoot instructions ( advice from support) but the IOS app picks up my old serial number and does not find my current unit. Has anyone else come across this and overcome the pairing issue. I have removed the IOS app and then reinstalled but no change.