Heart Rate Stuck on 66

Got'er working again

Went back to 2.40 did a hard reset and HR is unstuck… for now.

I only had to restart the watch and it was back up and running again - but RHR is now wrong for the day.

On 3.30 but stuck at 66

My FR235 is stuck at 66 too. I did several reboots and hard resets, but it stays stuck at 66. When connecting a strap, there doesn't seem to be a problem, but that's not what I bought a watch with optical HRM for.

Thinking of returning it, since I only have it for a couple of days.
It feels like I am a beta tester right now. This watch shouldn't be released yet.

The overall quality of the device is imho also quite disapointing.

235 stuck on 66 bpm

My Forerunner 235 is on 3.30 and yesterday all of a sudden I got the stuck on 66 bpm. Tried "powering off/on the watch", "heart rate monitor on/off" and even put the watch in "restore to default". Nothing worked. This morning I just held the Power switch for more than 10 seconds, noticed the screen diminishes itself, waited a few mins before powering the watch on again. Checked HR and its working fine now.

This morning I just held the Power switch for more than 10 seconds, noticed the screen diminishes itself, waited a few mins before powering the watch on again. Checked HR and its working fine now.

a.k.a. Hard Reset. Waiting a few minutes before powering back on seems to make a difference not sure why...

Fixed...

Mine has also just been fixed using this method:

go to HR screen and hold up, turn off HR monitoring
Hold power button down for 15 seconds and the screen slowly fades. Do not say yes when it asks you if you want to power off.
Power back on
Go back to HR screen and switch HR back on.

Been on 66 for a few days now and this is the only thing that has kicked it back to life.

Twice now in the past 2 weeks I've had the 66 bug. This is after a month and a half of perfect function.

It has both times been preceded by the watch burning battery at an incredibly high rate despite not being used in any activity - we're talking 25% battery in 8 hours with the GPS off the whole time. During this, the watch has been showing HR normally. Both times I've tried turning the watch off normally, then waiting a minute then turning it back on. Both times the watch continued to drain 1%+ battery per hour while doing nothing, so I've done a hard reset(hold power 15+seconds till it shuts down). Both times following the hard reset, the watch boots back up to the permanent 66HR and STILL draining batter at 1%/hr. Multiple hard resets afterward did nothing to change the HR from 66. An additional thing I noticed is that when it hits this mode, turning the watch off or plugging it into the charger does not turn off the green HR LEDs. Sometimes not even the hard resets turned them off.

Finally I was able to get it out of 66mode by turning off the HR monitor in the settings, then hard power down, waited 5 minutes, booted it back up and waited another minute before enabling the HR monitor again. That fixed it both times.

Both instances after the hard resets the watch's time has ended up being way off, it's like it gets reset to the time that I first powered it down. It synchronizes again only after being plugged in to charge (which is fine I guess since it needs to be charged after draining half the battery for nothing).

Twice now in the past 2 weeks I've had the 66 bug. This is after a month and a half of perfect function.

It has both times been preceded by the watch burning battery at an incredibly high rate despite not being used in any activity - we're talking 25% battery in 8 hours with the GPS off the whole time. During this, the watch has been showing HR normally. Both times I've tried turning the watch off normally, then waiting a minute then turning it back on. Both times the watch continued to drain 1%+ battery per hour while doing nothing, so I've done a hard reset(hold power 15+seconds till it shuts down). Both times following the hard reset, the watch boots back up to the permanent 66HR and STILL draining batter at 1%/hr. Multiple hard resets afterward did nothing to change the HR from 66. An additional thing I noticed is that when it hits this mode, turning the watch off or plugging it into the charger does not turn off the green HR LEDs. Sometimes not even the hard resets turned them off.

Finally I was able to get it out of 66mode by turning off the HR monitor in the settings, then hard power down, waited 5 minutes, booted it back up and waited another minute before enabling the HR monitor again. That fixed it both times.

Both instances after the hard resets the watch's time has ended up being way off, it's like it gets reset to the time that I first powered it down. It synchronizes again only after being plugged in to charge (which is fine I guess since it needs to be charged after draining half the battery for nothing).

I returned mine long ago. Even though I see Garmin graced us with an update, I am over Garmin for now. Back to my FitBit Charge HR and loving it.

Heart rate stuck at 66.

My Garmin 235 got delivered yesterday and today it's stuck on HR 66.

After installing a couple of Apps, testing out the functionality, upgrading to FW 3.30, today the HR is stuck.
Garmin Express says latest version is 3.30.

Is the 3.50 update available? Is the HR issue now solved or not?

Is the 3.50 update available? Is the HR issue now solved or not?

No and no...