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HRM-Pro "No HR"

Hi all,

I am a long-term user of the HRM-Pro and Forerunner 945. Both have served me very well and I use the HRM-Pro very regularly for running/HIIT cardio for the last two or so years. During my most recent workout I noticed the HRM-Pro was not recording my heart rate and was showing "No HR" on the Forerunner. The HRM was at all times connected to my Forerunner, so I do not think it is a connection issue. Later during the workout the HRM started picking up my HR as normal, but still showed "No HR" from time to time.

Has anyone else had this issue? Is this a matter of the HRM ending service life? Any tips on this issue, or is it time to think about a replacement?

Thank you all.