Cadence sensor dead after changing battery

Put in a new battery and now won't work at all. Speed sensor is fine after battery change. Checked with a different battery, nothing. Did the flip battery and left open just in case this would work. The white card fell out - does it have to put back in a specific position?

Top Replies

BLee over 4 years ago +9

I finally got the cadence sensor to connect.

When you open the battery, the connector on the battery lid needs to be seated just right so that when you close the lid, the connector hits the little bronze…
LRPFEIL over 4 years ago +5

What just worked for me was prying the smaller connector upward a bit. Obviously it had gotten bent down. I was having no luck after changing battery and Garmin connect told me it must be dead...ha! The…
4813341 over 4 years ago in reply to BLee +3 suggested

This worked for me !! Thank you !!

All Replies

0 1584997 over 1 year ago in reply to BLee

Fixed my issue! Thank you SO much!

0 3624304 over 1 year ago in reply to PaulDB

Thank you - spent hours today trying to get sensors to work with new 840. New batteries, resets, nothing worked. This explanation on the position of the paper behind the battery is the key. Finally I can bike....

0 6874293 12 months ago

The + connection sometimes gets misaligned. See attached video which explains the issues and shows how to fix it. It worked for me!
https://www.google.com/search?sca_esv=579562946&rlz=1C1CHZN_enAU1081AU1081&cs=0&q=Garmin+cadence+sensor+not+working&sa=X&ved=2ahUKEwj_r4mqnayCAxXx4jgGHcC8C9MQpboHegQIAhAA&biw=1920&bih=923&dpr=1#fpstate=ive&vld=cid:fd31642e,vid:eXLsG9ZzRiQ,st:0

0 6874293 12 months ago

0 3275678 10 months ago in reply to BLee

This worked for me too! Here is the video of how it fits for anyone confused:
www.youtube.com/.../eXLsG9ZzRiQ

0 2937607 9 months ago in reply to 3275678

Just tried almost the things shown but no luck. Then half locked the unit and green light came up so hopefully that's cured it.

0 jcjessop72 7 months ago in reply to 4813341

Great tip worked for me as well

0 4725443 7 months ago in reply to BLee

Thanks, worked for me as well. I actually lifted up the little bronze nub on the sensor within the battery compartment and contact is back and so is the green light.

0 clintjorgy 6 months ago

Having same issue with two sensors. Changed batteries 3 times each / resetting battery and lid 3 times. Connecting to crank arm and running through add senor | cadence ... 3 times. Looks like I get to have more fun. Or buy a new one on Amazon. Grrrr - Design is important.

0 7149159 6 months ago in reply to clintjorgy

Sadly I have the same issue with my speed sensor. I just haven’t committed to buying a new one yet….