My Garmin speed and cadence sensors, as well as my Garmin Varia became unpaired to the Bolt after working flawlessly for 2 years. I was able to re-pair the Varia and cadence, but cannot get the head unit or app to find the speed sensor. I changed the battery and turned off the head unit and app, then turned them back on, but the speed sensor is still not found. I spin up the wheel to wake up the sensor each time.
Any suggestions or insight as to what is he problem