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!

53 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 😉

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