Polar H7 Not Pairing? Discharge It

I you have a Polar H7 that all of the sudden was unable to pair, you may need to discharge the sensor. To do so:

  1. Trash the Pairing. Go to Settings -> My Sensors -> Heart Rate Monitors -> Bluetooth Smart -> Details -> Delete. This step is only needed if the H7 is “ON”.
  2. Remove the battery from your Polar H7. Using a coin, open the battery cover by turning it counterclockwise to OPEN. Remove the cap. Using a sharp edge (knife), lift the battery out from inside the cap.
    Photo 1: Intact battery
    Photo 2: Battery being lifted from the cap
    Photo 3: Battery successfully extracted!

    Note: When removing the battery, make sure the sealing ring is not damaged, in which case you should replace it with a new one. You can purchase the sealing ring/battery kits at well-equipped Polar retailers and authorized Polar Services.

  3. Close the back of the peanut that used to house the battery, and clip it on to the belt, without the battery.
  4. Put sensor on and wear for 30 seconds to 1 minutes
  5. Remove H7 peanut and insert battery. Remount on chest
  6. Re-pair the H7 with Fitdigits by going to Settings -> My Sensors

If you are still unable to pair, please contact support.

46 thoughts on “Polar H7 Not Pairing? Discharge It”

  1. Nothing has worked for me. I bought the Polar a300 and h7 combo. After the first day I could not get the watch and chest strap to connect, they could pair but not connect. I tried to take the battery out for 6 minutes and touching the electrodes for 10 seconds. I've tried the above mentioned idea, I've trashed the pairings and started over. I went and bought a second watch to use the other H7 only for it not to connect. I recently started setting up the new watch to see if maybe it was the watch and not the chest strap that was the issue. Only to find that it still doesn't work. Help please!

  2. My H7 was paired with the app and working just fine. Then I upgraded to iOS9. Now the app no longer sees it. On the settings screen, half the time it says no devices are in range and the other half of the time the app crashes when it tries to find it. Tried the discharge procedure and it didn't work. H7 battery is fine. Any advice?

  3. José J. Longoria Thanks so much for this link. The discharging method had been working fine for me up until yesterday, when nothing seemed to. Then I read your link describing the potentially bent battery connector, and visual inspection of the part in my own unit suggested that was the problem (it was clearly bent down, rather than standing up). However, at first I could not fix it – after unbending the connector, it would bend again every time I put the battery back into the H7. I then realised I bought a CR2032 battery, which is slightly larger than the correct battery, the CR2025. The CR2032 had been working, but seems to have also been the culprit for the bent connector due to the larger battery making the peanut not fit correctly. Unbending the connector and switching to the smaller and appropriate CR2025 has fixed the issue!

  4. Thank you your post was very helpful.
    After trying all of the suggested fixes I was unfortunately unable to get my heart rate transponder to reconnect with the M400.
    I contacted Polar support and they are going to pay the postage return for the whole kit to go to Singapore for repair.

    Great customer service no messing about just fix it.

    Thanks Polar, I am going to miss the Heart Rate monitor a lot.


  5. I have just went through a similar issue and discharging did not help, but this is what did. I actually read this tip on another site, but figured I’d post it here. While I was changing the battery, I accidently pushed the silver battery contact next to the edge of the battery compartment. After couple of careful tries to pull it out with a paper clip it popped up a bit and the monitor started working again! I hope it helps.

  6. This is how I got my polar H7 to PAIR AND CONNECT with my Android Moto X Pure Edition phone.

    Previously, resetting the phone, nor resetting the H7 heart rate monitor (by resetting the battery) could get the devices to pair and connect. The Moto X would pair with the Polar H7, but the Polar Beat app would not *CONNECT* to the paired H7.

    Based on the info in the Moto X, I suspected it was trying to work, but just not connecting to the Android apps, specifically Polar Beat.

    Today I tried looking for some Bluetooth apps to confirm whether or not the BLE (Bluetooth Low Energy) protocol was working on my cell phone. I found an Android app called "BLE Scanner". After installing and testing for BLE, the app detected the BLE protocol confirming the H7 was paired. However, the BLE app asked if I wanted to CONNECT to the H7. I tapped on the button to connect. I then opened the Polar Beat App, and guess what?, Polar Beat is now connected to the H7 and working as it should.

    So what is wrong, the cell phone or the Polar Beat app?

    I don't know. All I know for sure is that it is now working.
    Other Moto X Pure Edition owners may want to give the Android app "BLE Scanner" a try and see if it fixes their similar problem.

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