I have the same issue with my iPhone/HRM-Dual that you have, Garmin replaced the first under warranty, and the second one worked for like a week, then it started doing the same thing. I’ve contacted TR support and was sent to Garmin and Garmin Support was no help the second time around. It’s a HRM to iPhone issue as it works via bluetooth to my apple tv and laptop, but not to my iPhone(in seperate tries, I’m aware I can only have one BT connection at a time)
“ Update: Turns out the Garmin HRM-DUAL can indeed do dual Bluetooth as well. Initially when I asked Garmin they said they were limited, but they re-confirmed today they initially misspoke and it will indeed do dual Bluetooth Smart connections, as well as the ANT+ channel. And in fact – I’m able to validate exactly this on my strap.” - DC Rainmaker
Turn off every device in your house and then just turn on the two devices you want. Connect to those. If that works, it was connecting to something else first.
I use a dual. I run TR on my MacBook and run a Garmin Indoor ride on my 1030 simultaneously. I also connect the 1030 to my iPhone for Xert data field updates via Garmin Connect. If I unlock the iPhone before I connect to the MacBook and 1030, I have issues. If I connect to the MacBook and 1030 first (look for HR on both devices before I click start), and then open my iPhone with Garmin connect, everything works fine.
I have an issue that fits the title but isn’t quite the same…
I’ve had a HRM Dual for a few years, worked great until a few days ago when it wouldn’t connect to my Edge 830.
Trying to troubleshoot it today it turns out it won’t connect to my Fenix 5 or TR either. TR is a win-PC with ant+.
Replaced battery but no change so I figured it’s dead for some reason.
Went by a lbs and picked up a new one. To my surprise - nothing. Can’t pair it to anything either!
So assuming I still have a heart rate, and it definately felt like during The Priest +4 today, what am I missing?
Try installing the battery backwards for 30 seconds(no need to screw the unit shut, just hold it there.) this will short both leads out and cause any capacitors to discharge, then re-install the battery normally.
I’m at a loss. The only time I’ve had that problem (Wahoo TICKR, multiples of them) the HR< is dying or dead. I have one that broadcasts when dry and unused, but once it starts to heat up, it dies. It could be some leaking seals and sweat getting in, can’t be sure.
but, you have a new HRM, so I have no idea. For the Edge, did you try both ANT+ and BT? Same for the PC?