Originally Posted by
genejockey
Update - getting rid of the strap that was falling apart helped, but I'm still getting dropouts that seem random. For example, Friday before last I was on Zwift, riding one of the Climb Portals. I was grinding up the climb, with my HR slowly climbing, when suddenly it dropped from 158 to 53 - which was clearly nonsense. It stayed at 53 for the next 7 minutes, while I crested the climb. Then it came back, and worked fine for the remaining 25 minutes of the ride. As far as I can tell, NOTHING CHANGED! It just stopped working for 7 minutes and started again.
Apart from that, it seems to be working okay.
I have the Garmin HRM dual and have had identical problems. Sounds like it is still the strap. Getting a new strap from Garmin doesnt always solve the problem. I had Garmin ship me 5 before I finally got one that worked more than 3 months. I recently replaced that one after 2 years with this one
https://www.heartratemonitorsusa.com...28382247223401 which has the benefit of working with Polar HRMs as well. When the sending unit dies, I will replace with a Polar.