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Apple Watch 6 heart sensors

Hello, so my Apple Watch series 6’s sensors suddenly stopped working. I’ve tried everything and it only works if it’s fully charged and the sensors remain active until the screen is on. If the screen turns off, the sensors stop working.


Any idea why this happened?


Some info:


Apple watch series 6 44m

With 26.4GB capacity

Version 7.4 (18T195)

Model M00E3LL/A


Apple Watch

Posted on May 3, 2021 4:20 AM

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Question marked as Best reply

Posted on May 3, 2021 10:21 AM

The first (and simplest) thing to try if something isn’t working right is to restart your Apple Watch and its paired iPhone. If necessary (device not responding), try a forced restart. Both methods can be found here:

How to restart your Apple Watch - Apple Support

Restart your iPhone - Apple Support


If that doesn't help, the next steps would be to unpair and pair your watch again and restore from the backup just created. This should result in no loss of data. It deletes all temp and corrupted files and re-indexes the file system.

Unpair and erase your Apple Watch - Apple Support

Set up your Apple Watch - Apple Support


If you still need help, contact Apple Support.

Similar questions

1 reply
Question marked as Best reply

May 3, 2021 10:21 AM in response to shfd7450

The first (and simplest) thing to try if something isn’t working right is to restart your Apple Watch and its paired iPhone. If necessary (device not responding), try a forced restart. Both methods can be found here:

How to restart your Apple Watch - Apple Support

Restart your iPhone - Apple Support


If that doesn't help, the next steps would be to unpair and pair your watch again and restore from the backup just created. This should result in no loss of data. It deletes all temp and corrupted files and re-indexes the file system.

Unpair and erase your Apple Watch - Apple Support

Set up your Apple Watch - Apple Support


If you still need help, contact Apple Support.

Apple Watch 6 heart sensors

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