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Erratic HRM readings with soft strap HRM

I have a Garmin Edge 520 plus. I use it with a Garmin soft strap HRM. For the most part it works fine. Occasionally I do not get a reading at all, though the Garmin headunit shows that it is paired to the HRM. Other times is shows very low HR readings, in the 50 - 70 range though I am moving at a good clip. After about an hour of riding the readings go to normal (when compared to my Apple Watch).

i have washed the strap and replaced the battery (using the procedure detailed elsewhere here).

What gives? Anyone else experience the same issues? Solutions (other than buying a new HRM, mine is a little over a year old)?

Thanks and Happy New Year.

0 ghettocruiser over 6 years ago

I never gotten a year out of a band from any manufacturer. You can replace the strap and keep the transmitter, check amazon etc, they all work about the same.

0 geneld over 5 years ago in reply to ghettocruiser

This sounds similar to my issue - why does this happen?

0 aclass over 5 years ago

same here. Mine is one year old and started its intermittent behavior a few months ago.

0 Former Member over 5 years ago

I had same issue. Resolved by buying new strap and sending unit. I had rarely washed the old strap. I believe it builds up salt content and when I ride over an hour the strap gets wet and shorts out. I have soaked my old strap and can use it, but it goes out intermittently. New strap and transmitter fixed the problem.

0 Former Member over 5 years ago

Many HRM strap problems can be resolved by regular washing. I soak mine in water after every ride and once a week it goes in the washing machine on the quick cycle. I've had mine for over 4 years and it still works well. In the first couple of months of owning mine I had regular drop out issues which I have not had since I do the regular cleaning.