My hrm dual is paired with an edge 840 and about an hour into a ride the heart rate data starts dropping out. I have a varia and power pedals also paired to the edge 840.
Last year my hrm dual would stick at 72bpm so it was replaced under warranty. Worked fine all summer, but now it's dropping out all together.
I replaced the battery, washed the strap. Tried pre wetting the strap.
I said I would get a polar strap if I had a other issue with this Garmin one, but I guess I'm not as ready to bin it and spend more money as I thought I was.
