Thanks, I'll keep an eye on it. It's literally sitting right next to the Skyconnect dongle so shouldn't be a range problem. I'm pretty sure the temperature would have changed so I'll try re-pairing and see if that helps.

If it goes out of range then back in, does it automatically reconnect? And do you know if the button on the humidity sensor does anything other than holding it in for 5 seconds puts it in pairing mode? Wondering if you press it briefly does it turn it off or reset the connection or anything.