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Problems with HRM Pro

Hi,

I have Forerunner 955 v14.15 and HRM Pro v8.80.

Last month or so HRM Pro data is totally ubreliable. Sometimes it doesn't measure running dynamics data or does it half of the run leaving some empty areas in the graphs. Sometimes it shows wrong HR. For example durning the interval runs or threshold runs it shows my HR -20bpm or even -30bpm compared to real HR.

Ive tried changing battery and reconnecting it to the watch and app but still optical heart rate of the watch itself is way more accurate. Unfortunately its winter here and it is comfortable to wear watch on the sleeve.

Ive had it since 08.2021 and never had any problems. First used it with 745 and now 955.

LTHR havent updated a month or so too. It used to calculate new values with every threshold, tempo or fartlek run.

Does anyone here have similar issues?

Top Replies

matt1206 over 2 years ago +1

Raise the issue with Garmin. When mine started to not report HR data, but was still producing running metrics, they replaced it for me under warranty.

All Replies

0 Martin Serafín over 2 years ago

Is your HRM PRO connected via ant+ or bluetooth? Do you also have headphones connected? Bluetooth causes problems. Ant+ is reliable

0 Kalmer over 2 years ago in reply to Martin Serafín

ANT+. Headphones are connected to my phone but even when connected to my watch that's not the case. Ive done it hundreds of times without any issues except last month.

0 Martin Serafín over 2 years ago in reply to Kalmer

Did you try to download the data from HRM-PRO after the run?

0 S.M.R. over 2 years ago

Have you contacted Garmin Support, they may replace the HRM

LTHR - well that is another issue altogether as you see from other posts in this forum.

0 9970217 over 2 years ago

LTHR not updating is a reccurring topic, if you look at the forum you will see many complaints.

HRM Pro not showing running dynamics only happened once to me.

0 Kalmer over 2 years ago in reply to Martin Serafín

Yes, ive tried that too with no result. It doesnt fill the empty blanks in the graphs or change the HR. Only training effect and load changes.

0 Kalmer over 2 years ago in reply to S.M.R.

No i have not yet because last few software versions of fr955 have been with lots of bugs and my HRM Pro have been working just fine over a year now. Except last month ofc. Tried to find out first if anyone else have seen anything like this lately.

0 matt1206 over 2 years ago

Raise the issue with Garmin. When mine started to not report HR data, but was still producing running metrics, they replaced it for me under warranty.

0 Risto over 2 years ago

Not sure if related, but in about 95% of my runs, there are running dynamics missing at the beginning of the workout (Yes, I make sure that the HR strap is connected before I start the workout). After a couple of minutes, everything seems to be fine. I'm using the original HRM-Run v1. Didn't have this problem with the FR 745.