The LED flashes red to indicate a low battery level after two revolutions. On soft strap monitors, just remove the orange rubber ring encircling the battery, before you insert the battery in reverse. A few days ago the speed sensor starting acting very strange. Thanks a lot. Garmin Edge 705 speed sensor stopped working I've had an Edge 705 for about 1 month now. Reversed battery, placed in strap for 2 mins then removed and replaced the correct way and bingo it paired immediately. Thanks for your feedback. ...choose your pick. I put the battery on backwards, re-assembled it, waited two minutes, took it apart, removed the battery, waited ten minutes, put the battery in correctly, assembled it, and immediately it connected! Loopacell 2032 Battery CR2032 Lithium 3v ( 1 Pack Of 5 ) 4.4 out of 5 stars 90. What a relief! I couldn’t get the strap working after a battery change, so I was resigned to thinking I’d need a new one as the same thing happened with my previous one. ... you may need to remove the battery and put it back in to change between speed and cadence modes. The contacts of the monitor are installed in a way that the misplaced battery will only cause a bypass between the two contacts. I replaced it this fall with a CatEye ISC-11 ANT+ speed/cadence sensor hoping that it will last longer then the Garmin. Worked, sensor found and paired in 15 seconds. The change itself is not that difficult – only remove the 4 screws at the backside, open the cover, change the old Battery with a new CR2032, close the cover and place the screws back. Perfect, worked for me. The battery cover (and, of course, battery within) on my wife's Garmin speed/cadence sensor disappeared somehow in the last month or so, likely never to be seen again. So it’ll work with any ANT+ device that supports the cycling speed/cadence sensor…which, is basically every device out there. Be careful: don’ t give reverse polarity to the device – only bypass the connectors! Thougt it was broken after keeping the brest monitor on during shower. Yep, it worked. Paper clip is the simplest way to do this. Did 45 min on the rollers and the speed sensor wasn't working; total ride distance was 7 ft. Heart rate and cadence seem to be working fine. Locate the circular battery cover on the back of the sensor. I have only had to replace a battery once, and it was after approximately 2 years worth of use. What a great post! I'm not sure if the speed data on Strava is from the sensor, or if its using GPS? Same issue, same batteries changed and same panic one week before a race ! Twist the cover counter-clockwise until the marker points to unlocked and the cover is loose enough to remove. But I do think I did it with a paper clip several years ago. The LED flashes green for five seconds to indicate activity. Worked, sensor found and paired in 15 seconds. I bought 2-from Amazon and 1-directly from Garmin, they are all identical and cost the same. Replacing the Speed Sensor Battery. In all of my searching the Garmin GSC-10 is always the cheapest solution for an ANT+ Speed/Cadence sensor that I can find. Solved my problem with heartratee brest motitor too. old. Do you think this will work as well as the Wahoo Speed/Cadence sensor you show? Remove the cover and the battery . Aside from that it works flawlessly. Almost impossible to get the upside down battery out, something I had to do straight away as it made no difference to my HRM1G. After this procedure the heart rate monitor build up a proper connection to my garmin computers and every thing works as expected. Have no idea why some people are having trouble getting the battery out. I just bought the Garmin speed 2 and cadence 2 sensor and paired with my Polar V650. Maybe I just got lucky, but it worked first time for me.After your experience with a stuck battery, better advice for others would simply be to short the two contacts with a coin, screwdriver, it piece of wire. if I go at 24.2 km/h then it drops to 12.1 km/h and then back to 24 and so forth… Any guess? Since the unit acts as a standard ANT+ speed/cadence sensor, it’s functionally identical to that of the more commonly found GSC-10 (Garmin Speed/Cadence sensor). How To: Reset a Garmin heart rate monitor. Once set up, you’ll get accurate speed and distance at all times — even without a head unit. I was starting to panic, as I am running the Liverpool half-marathon tomorrow and the chest strap monitor that came with my Garmin Forerunner 305 suddenly stopped working yesterday. This week I tried to change the Battery on my Garmin heart rate monitor ( HRM2-SS ). The LED flashes red to indicate a low battery level. Replacing the Speed Sensor or Cadence Sensor Battery. Another trick that may work is to heat the sensor up with a hair dryer or heat gun (let it run on low heat for 15-30 minutes) to dry out any moisture collected inside. Remove the battery from the ANT+ sensor. Leave the battery out of the sensor for 5 minutes. !It worked for me too ! Thanks a lot ! This solution is soooo awesome. Bypassing the battery contacts should cause a reset of the device. A colleague of mine who uses a (optical) nearly similar polar heart belt, gave me the hint to short-circuiting the monitor for a few minutes. Came home swapped sensor to Leah's strap, still not reading. 4.6 out of 5 stars 1,443. Enable Bluetooth® technology on … Work for me as well! The speed sensor 2 attaches to the hub of either wheel. Bontrager DuoTrap is the integrated sensor that wirelessly transmits ANT+ and Bluetooth® Smart signals to your computer or phone. Twist the cover counter-clockwise until the marker points to unlocked and the cover is loose enough to remove. 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