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HRM stops at night

BenjaminRietveld over 3 years ago

My Forerunner 245 stops tracking heart rate at night. In the day time it works fine. This is last thursday for example:

I tried resetting the watch and sure enough the next night was fine:

But two days later the problem was back:

I now enabled tracking sleep pulse ox, but that doesn't seem to make a problem, as it shouldn't.

This is really annoying, as I'd like to know my resting HR in order to plan recovery.

Any suggestions?

Thanks in advance for your help!

0 Grumpy from dawn till dusk over 3 years ago

BenjaminRietveld said:
Any suggestions?

Are you sure, that your watch is tight (enough) on your wrist during the night?

There is no other reason I could imagine, why the HR would be measured during daytime and some nights, but some nights not.

0 BenjaminRietveld over 3 years ago in reply to Grumpy from dawn till dusk

Thanks for your response. My watch is tight at night, I don't adjust it before going to bed. To make things even weirder, when I get up without taking my watch off it spontaneously starts tracking HR again.

Last night was like this:

I definitely didn't loosen my watch at 2 AM, because I was sleeping at the time.

0 Grumpy from dawn till dusk over 3 years ago in reply to BenjaminRietveld

Hmm, strange indeed.

Obviously HR Tracking and MoveIQ is activated, so it should work. No matter if night or day.

I have no further suggestions

0 Garmin-Isabella over 3 years ago

Hello! When did this issue start for you? What is the WHR and Sensor Hub software version on your watch? (Menu>System>About>Scroll down 5 times)

0 BenjaminRietveld over 3 years ago in reply to Garmin-Isabella

The issue started on the 9th of January.

WHR version is 5.00.04

Sensor hub is 14.05

To be clear: the lights from the sensor don't come on at night. So it's not a matter of the watch being loose or anything, the watch isn't even trying to measure a heart rate.

0 BenjaminRietveld over 3 years ago in reply to Garmin-Isabella

Could you please come back to me?

0 Garmin-Isabella over 3 years ago in reply to BenjaminRietveld

What type of reset did you perform on the watch? Reset settings and delete data?

0 BenjaminRietveld over 3 years ago in reply to Garmin-Isabella

Yes, a complete reset. It worked for two nights.

0 Garmin-Isabella over 3 years ago in reply to BenjaminRietveld

Please reply with the following:

May I have permission to email you?
May I have permission to view/access your Garmin Connect account?
In what country do you live?

0 BenjaminRietveld over 3 years ago in reply to Garmin-Isabella

1. Yes
2. Yes
3. The Netherlands