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ECG not working

ECG app opens but will not read when finger is held against crown. It is on correct wrist, arm is still either on my lap or on a table, I have tried using different fingers, and have had other people try it as well. There isn’t an option to update the ecg app anywhere. The watch and my iPhone have most recent updates installed.

Apple Watch Series 4, watchOS 7

Posted on Jun 9, 2021 10:07 PM

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Question marked as Top-ranking reply

Posted on Jun 10, 2021 7:10 AM

Could it be that ECG is not available in your country yet? Check in here for that and other requirements:


Taking an ECG with the ECG app on Apple Watch Series 4, Series 5, or Series 6 - Apple Support


watchOS - Feature Availability - Apple

3 replies

Jun 11, 2021 7:36 PM in response to WonderingNotLost

OK, could it be that some dirt has gotten into it? That can happen with the crown in particular.


  1. Turn off your Apple Watch and remove it from the charger.
  2. If you have a leather band, remove it from your Apple Watch.
  3. Hold the Digital Crown under lightly running, warm, fresh water from a tap for 10 to 15 seconds. Soaps and other cleaning products shouldn't be used.
  4. Continuously turn and press the Digital Crown as water runs over the small gap between the crown and the housing. 
  5. Dry your Apple Watch with an absorbent, non-abrasive, lint-free cloth. Make sure to wipe the surface of the Digital Crown, the space between the Digital Crown and the watch case, and the surrounding surfaces, removing any water.

How to clean your Apple Watch – Apple Support

ECG not working

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