As per title ... watch no longer vibrates (Gen 1) when notification arrives ? Any ideas anyone ? Thanks in advance

 

Does it fail to vibrate for anything, or is it just new notifications that don't work?

The first thing to try is restarting the watch, next would be factory resetting it.

 

My Heuer is also stopped vibrating this week.
I’m factory resetting it now. Fingers crossed.

 

Mine (1st gen) stopped vibrating after 12 months (2016). They sent me a new watch, which works fine up to now . but it lacks the 'swiss enigneered' engraving (rare ).