Hold the touchscreen. Select Settings > User Profile > Heart Rate Zones. Select Default to view the default values (optional). The default values can be applied to running and cycling. Select Running or Cycling. Select Preference > Set Custom. Select Max. HR, and enter your maximum heart rate. Select a zone, and enter a value for each zone. Heart Rate Monitor Problems. I have the Vivoactive 4s with firmware version 6.50. My watch has stopped periodically logging my heart rate (stress, sleep, and daily heart rate info is no longer available). The watch face and heart rate widget only show "---". Heart rate data is logged during activities (such as jogging), but that seems to be the VivoActive 4s heart rate stopped working. 5887094 over 1 year ago. My Vivoactive 4s' heart rate stopped working after an auto update. I tried to turn off and on again. My husband even tried to reset it and connected to his garmin profile the result is the same. I tried to switch off then on (auto mode) in settings menu then the sensor blinked a Make sure the heart rate monitor is switched on. my Garmin VivoSmart 3 will not record my “fall asleep” time. Last night my Vivoactive 3 showed I did not go to sleep until 3 am when in Select > > . The vívosmart 3 device starts broadcasting your heart rate data. NOTE: You can view only the heart rate monitoring screen while broadcasting heart rate data. Pair your vívosmart 3 device with your Garmin ANT‍+® compatible device. NOTE: The pairing instructions differ for each Garmin compatible device. See your owner's manual. SAME HERE! VA3-Music. I have this problem multiple times per week. I shut it off, wait, and turn back on and SOMETIMES it works. If not, then I do a reset (HUGE PITA because I have to reconnect to phone, reconnect to wi-fi, reconfigure watch face and I lose my progress). To be perfectly honest, I currently use the Vívoactive HR for swimming, which does track heart rate data during swimming, and I use the Vívoactive 3 for running. I'm currently experimenting with paying for a swimming app in the Garmin Connect IQ Store that'll reprogram the default programming for swimming. my vivoactive 4S is a little over 3 years old now and started experiencing some issues. After doing a deep clean, factory reset and the newest software update, most issues disappeared. One new issue that appeared is that the green lights of the heart rate monitor stopped working. 9i2aBV.