Question about Garmin Forerunner 305 GPS Receiver

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Recently purchased a edge 305cadenec/heart rate monitor.cadence is not coming up on the monitor. every thing else is working. Pushed the reset button on the sensor the speed light was fine the cadence light seem to be missing now and then,the magnet seems to be in the right place.

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  • Anonymous Mar 16, 2014

    Recently purchased Garmin Edge 800 and had no problem setting it up with the Garmin hr monitor and speed/cadence sensor. I thought all was well until I rode the bike and realized that the Edge was doubling my road speed and hence miles covered as well. It would occasionally momentarily flash the correct speed but would bounce right back to double where it was 99% of the time. Unit was also pausing momentarily and then immediately resuming. This Edge 800 is new but I have one several years old that I use on another bike and when I tried that older unit on the new bike it did the same thing, doubling speed and mileage and pausing and resuming frequently. Is there anything in the set up process that I missed and that would cause both units to do the same thing? Any suggestions would be appreciated.

  • Anonymous Mar 27, 2014

    How do I pair a wahoo heart rate monitor and wahoo speed and cadence sensor to a garmin 510



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Suggest you first try changing the battery in the sensor...then reset, then rescan for it on unit. It seems like quite a few have been shipped with dud batteries.

Good luck!

Posted on Nov 28, 2008


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Posted on Jan 02, 2017


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My solution included changing the battery in the cadence sensor (GSC10). You might not need to.
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