I have a Garmin cadence sensor now - will it work with new 500

Contact Garmin, this will be under warranty as it less than a year old.

This sensor mounts to the rear chainstay opposite the side with your drivetrain (gears).

This is probably a pairing problem. Device and cadence should be paired. Pairing is often lost when changing battery.

Pairing the Edge 305 and sensors
Once you have installed the Garmin Edge 305 and the cadence sensor they need to be paired. As they communicate wirelessly with each other the Edge needs to connect to each sensor before it can receive input from it.

The initial pairing needs to be done away from other wireless systems this allows the Edge to pick up the sensors it is supposed to be monitoring. This is a little like black magic, but it seems to work quite easily.

The cadence sensor has a small press contact which puts the sensor into pairing mode. The HRM just seemed to connect by itself.

Subsequent pairing is much faster as the Edge 305 seems to remember which sensors it is paired with. If you have problems or need to change one of the sensors then you can use a setup feature to either turn the sensor off or to re-pair it.

yes the 305 will work with the 500, i use my 305 hrm with both

Solution copied from Garmin



Pairing the Edge 305 and sensors
Once you have installed the Garmin Edge 305 and the cadence sensor they need to be paired. As they communicate wirelessly with each other the Edge needs to connect to each sensor before it can receive input from it.

The initial pairing needs to be done away from other wireless systems this allows the Edge to pick up the sensors it is supposed to be monitoring. This is a little like black magic, but it seems to work quite easily.

The cadence sensor has a small press contact which puts the sensor into pairing mode. The HRM just seemed to connect by itself.

Subsequent pairing is much faster as the Edge 305 seems to remember which sensors it is paired with. If you have problems or need to change one of the sensors then you can use a setup feature to either turn the sensor off or to re-pair it.

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!

Do you own the optional cadence sensor? If so you can only use it in Biking Mode.

If you own the sensor and are using Biking Mode. Then try a reset and if still no luck. Contact Garmin about getting it repaired.

Good Luck!

My solution included changing the battery in the cadence sensor (GSC10). You might not need to.
1. After changing battery, take bike outside. Turn on Edge 305 to acquire satellites (might not be necessary..)
2. Press reset button on GSC10. Should see red/green flash.
3. On Edge 305, go to SYSTEM.
4. Scroll down to ACCESSORIES.
5. On Accessory page, scroll to bottom, under Cadence Sensor, and press RESTART SCAN.
That fixed my Edge 305 - cadence and speed do appear now.

the rescan worked for me, didn't know it existed, briljant. Follow list below:settings/system/accessoires/rescan
I love google today;o)

Had the same problem. Here is how I fixed it.
1. Changed the battery in the cadence sensor. (GSC10)
2. Turned on my garmin 305 edge outside to acquire satellites (probably not nec but did it anyway)
3. Pressed reset on the GSC10, saw red/green flash (what order?)
4. Here's the missing step: On the Edge unit, go to SYSTEM.
5. Scroll to bottom, choose ACCESSORIES.
6. On acc. page, go to bottom, under Cadence Sensor, to the option RESTART SCAN. Press That. Now your cadence and speed should work.