How to get the Garmin heart rate monitor to work after a Battery change

This week I tried to change the Battery on my Garmin heart rate monitor ( HRM2-SS ). 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. After that the Heart rate was not shown in my Forerunner or Edge…
To fix the problem I tried to reconnect the monitor with the forerunner manymany times – without any success.
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. Bypassing the battery contacts should cause a reset of the device. This could easily done with a paper clip or by inserting the battery in the wrong direction. The contacts of the monitor are installed in a way that the misplaced battery will only cause a bypass between the two contacts. Be careful: don’ t give reverse polarity to the device – only bypass the connectors!
After this procedure the heart rate monitor build up a proper connection to my garmin computers and every thing works as expected. By the way – i love my Garmin devices!

58 thoughts on “How to get the Garmin heart rate monitor to work after a Battery change

  1. Hello Tracy,
    open the battery case, remove the battery, locate the 2 small metal pieces which are connected to the battery, connect them
    with the paperclip.


  2. Thank you Daniel! : ) I tried the turn upside down trick and “evenly” applying full contact to the back of the case. It works now!! Wahoo, however I have fully stripped one of the screws now. On the Garmin site for blogs – sad to see I am not the only one looking for a replacement screw or two or three. ;o) Thanks again for your kind reply and explanation!! Any advise how to get my bike cadence sensor to sync back after changing its battery? It worked for me last year – not playing nice this year. Going to check for that perfect 3-5 mm gap.

  3. Thanks for that tip. I had the same problem and you procedure worked like a charm.
    And I was already shopping for a new monitor, silly me 😉

  4. Thanks. This worked for me also. Just one more tip. Make sure you’re away from any 2.4 GHz wireless sensors like wireless LAN (WiFi). My device just woulnd’t pair next to my laptop while reading this. Moved away a bit and it paired immediately.

  5. None if these worked for me. I connected the metal pieces. I was away from any wifi. I was away from my phone. I think I’ll try making an aluminum foil hat.

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