Apple Watch Won't Play Music on Airpods while showing connected via bluetooth - Solution
My apple watch 3 on 4.2.3 showed my AirPods as connected under general bluetooth settings but when I tried to play music from my apple watch an error kept appearing that apple watch could not connect to AirPods and asked if AirPods were out of range. The AirPods were definitely connected though as I could hear the start chimes on my running app.
To solve this issue I did the below:
1) On iPhone in bluetooth settings I chose to forget the AirPods bluetooth device
2) Restarted Apple Watch
3) Held down button on AirPods case with lid open and both AirPods installed in the case until the amber light flashed three times (takes 10-15secs)
4)Closed the AirPods case and opened next to my iPhone to reconnect airpods
This seemed to fix the problem, I tried various other things but the above was the only thing that seemed to work. Switching between iPhone and apple watch when using my AirPods now seems to work flawlessly.
Apple Watch Series 3, iOS 11.2.6, null