Heart rate is too high

[Lisnya]

Yesterday, my Charge 3 started showing the heart rate wrong. I did a workout in the morning, for example, and it showed that I reached peak heart rate while simply stretching. Later at night I was standing in the sink and I noticed that it was showing a pulse of 164. It also showed that I burned over 4000 calories, when I only walked ~22km. Late at night, I noticed that the band was torn, so I replaced it with the large size band that also came with the Charge 3. My heart rate immediately dropped.

I hoped that maybe the band was the problem but this morning, about an hour into my walk (I do walking tours and I've replaced them with long-distance walking during the quarantine), I noticed that the heart rate was wrong again. Into the 130s, when it should be in the 90s. I restarted it a few times while walking and when it turned back on, it was accurate for a few minutes, maybe, then it went straight up to >100. Hell, it was at 137 when I was standing over the stove, stirring the pot!

I've since turned off HR for maybe an hour and now I'm resting and it seems accurate. I'm sure it'll go straight up again if I take a step, though. Any ideas on how to fix it? I've also tried resetting it and wearing it in my other wrist. Also, I'm using the last hole in the band and it's maybe a tiny bit looser than the smaller band if not the same, if that makes any difference.

[MarreFitbit]

Hello there @Lisnya, thanks for stopping by in the Community Forums. I appreciate the details provided in your post about the accuracy of the heart readings on your Charge 3 and your time in troubleshoot it prior to posting here.

As a first approach, we'd like you to perform the following steps below for this situation:

• Switch the Heart Rate settings from On to Off and manually sync your Charge 3. To switch the heart rate settings on your Charge 3, from the main screen of your Charge 3, swipe left until you see "Settings", next swipe up until you see "Heart Rate" and switch it to Off.
• Once it's done, manually sync your Charge 3. To do so, open the Fitbit app, tap on the Account icon, tap on your Charge 3's image and tap on "Sync Now" 
• Next, switch it from Off to On and manually sync your Charge 3 once again. 
• Once it's done, restart your Charge 3 once again. To do so, press and hold the left button for 8 seconds while it is plugged into the charging cable as if it were charging. 
• Next, confirm that your tracker is snug on your wrist (the lights shouldn't be visible) We also recommend when you're not exercising, wear the tracker just above the wrist bone.

Also, I'd recommend taking a look at this help article: What factos can affect my heart-rate reading on my Fitbit device?

Let me know the outcome, I'll be around. 

[Lisnya]

Right, I tried all of these and it changed nothing. At least not for the better. There are now missing lines on the screen, as of yesterday every time I sync the watch to my phone, the calories go down and the battery doesn't last. I started thinking it was draining faster two days ago, I think? I confirmed it today because I charged it to 86% and a few hours later it's at 44%. There is no way to fix it, is there? I need a new one again.