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Original poster
Oct 25, 2014
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Hey all. Was wondering if anybody else has come across this glitch.

(Not sure if it’s a software glitch or a hardware malfunction. Or both. But I’ll just call it a glitch for now.)

I tried to take an ECG reading today (hadn’t done so since last week — and rarely do so anyway). I put my finger on the crown and immediately noticed that my readings were all over the place.

(If it was a legitimate reading, I would have been very worried.)

But after I took my finger off the crown, I saw that my Apple Watch (Series 6) was still taking readings. It seemed that simply being off my wrist was enough to record an electrical reading (although super erratic).

I turned the Apple Watch off and back on (hoping that would resolve any issues), but it didn’t seem to help.

I began doing various things to troubleshoot it. Sometimes (on the wrist, no finger not on the crown) it would take very erratic readings that vaguely resembles heart activity. Sometimes (on the wrist, no finger not on the crown) it would be mostly a flatline. Rarely I could get it to display something that mostly-matched what I would expect from a typical ECG reading (although it would be bad enough where the Apple Watch would say “Poor Recording”.

I even took my watch off my wrist completely and placed it on my desk. And it was still taking the ECG readings. Although away from my body and on the desk the ECG reading was a flatline (as you would expect). Although not completely flat.

My Apple Watch (Series 6) is currently on 10.4. I’ll try updating it to 10.5 after I get home (maybe that will fix the issue).

Has anybody else had a problem like this? Everything else about my Apple Watch seems to be fine. And the ECG seemingly worked perfectly-fine last week. I haven’t updated any software or install anything new since then the last time I successfully used the ECG.

I rarely use the ECG, so if it’s a hardware malfunction I’ll just do nothing and wait until I eventually get a new Apple Watch. Although it is Prime Day and there are Apple Watches on sale… 🤔🤔🤔 lol.
 
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Hey all. Was wondering if anybody else has come across this glitch.

(Not sure if it’s a software glitch or a hardware malfunction. Or both. But I’ll just call it a glitch for now.)

I tried to take an ECG reading today (hadn’t done so since last week — and rarely do so anyway). I put my finger on the crown and immediately noticed that my readings were all over the place.

(If it was a legitimate reading, I would have been very worried.)

But after I took my finger off the crown, I saw that my Apple Watch (Series 6) was still taking readings. It seemed that simply being off my wrist was enough to record an electrical reading (although super erratic).

I turned the Apple Watch off and back on (hoping that would resolve any issues), but it didn’t seem to help.

I began doing various things to troubleshoot it. Sometimes (on the wrist, no finger not on the crown) it would take very erratic readings that vaguely resembles heart activity. Sometimes (on the wrist, no finger not on the crown) it would be mostly a flatline. Rarely I could get it to display something that mostly-matched what I would expect from a typical ECG reading (although it would be bad enough where the Apple Watch would say “Poor Recording”.

I even took my watch off my wrist completely and placed it on my desk. And it was still taking the ECG readings. Although away from my body and on the desk the ECG reading was a flatline (as you would expect). Although not completely flat.

My Apple Watch (Series 6) is currently on 10.4. I’ll try updating it to 10.5 after I get home (maybe that will fix the issue).

Has anybody else had a problem like this? Everything else about my Apple Watch seems to be fine. And the ECG seemingly worked perfectly-fine last week. I haven’t updated any software or install anything new since then the last time I successfully used the ECG.

I rarely use the ECG, so if it’s a hardware malfunction I’ll just do nothing and wait until I eventually get a new Apple Watch. Although it is Prime Day and there are Apple Watches on sale… 🤔🤔🤔 lol.
Cold reboot watch. Make sure sensors on the back and the crown are clean. Make sure watchOS is up to date.
 
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Nothing has helped. Updated to 10.5 (no difference). Fresh reset of the Apple Watch (no difference). Making sure the Apple Watch is clean. It’s always clean, but I double checked that it was clean (no difference).

I’m curious if downloading the public beta of watchOS 11 would provide some fixes. But if nothing else is wrong with my Apple Watch, I’ll just let me be for now (and wait for the non-beta release).

If anybody else has experienced a similar issue and has an idea for how to fix it though, please let me know.
 
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Nothing has helped. Updated to 10.5 (no difference). Fresh reset of the Apple Watch (no difference). Making sure the Apple Watch is clean. It’s always clean, but I double checked that it was clean (no difference).

I’m curious if downloading the public beta of watchOS 11 would provide some fixes. But if nothing else is wrong with my Apple Watch, I’ll just let me be for now (and wait for the non-beta release).

If anybody else has experienced a similar issue and has an idea for how to fix it though, please let me know.
Is it still accurately measuring your pulse/heart rate?
Does the crown have a scratch?

I think this is HW related, not SW
 
Is it still accurately measuring your pulse/heart rate?
Does the crown have a scratch?

I think this is HW related, not SW
Maybe.

There is no obvious signs of damage. Aside from some very minor (normal wear and tear over many years) light scratches on the screen, there isn’t any noticeable damage. The crown appears to be scratch free. And there is no obvious reason why it worked perfectly-well last week, but doesn’t work well at all this week. But yeah. It could be hardware (but just nothing visually obvious).

It shouldn’t be taking a reading at all if it’s not on my wrist (as I can get it to do when I put the watch on my desk). When I do that, it shows a flatline. So it’s accurate in that way (the desk has no heart activity, lol). But it shouldn’t be active at all at that point. That could be hardware. But that could be software. Or it could be both.

I’m not going to bother doing anything additional to address the problem further. If this is the only thing wrong with my Apple Watch, I’ll just leave it be. But if it gets resolved somehow (maybe a future update) I’ll post a quick reply to say it’s fine now.

Although if anybody else has a similar problem, please let me know. I would like to know that I’m not the only one having this problem (misery loves company and all of that, haha).
 
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My ECG readings are usually fine, I've seen weird behaviour when there has been lots of interference close by, try it away from other electrical devices/not in a car etc etc
 
Coincidentally I’ve been having a similar problem with my Series 6 45mm Apple Watch, with multiple’crashes’ with a massive splurge of random activity then the ECG app resets.
It also doesn’t recognise my finger pressing on the crown sometimes.
Then it will sort of work for a few seconds then glitch again.
I can still get a good reading - after about 10 to 15 tries…

WatchOS up to date and clean and undamaged.
Everything else works fine, although the screen is sometimes unresponsive to touch until I press the crown twice.
 
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Coincidentally I’ve been having a similar problem with my Series 6 45mm Apple Watch, with multiple’crashes’ with a massive splurge of random activity then the ECG app resets.
It also doesn’t recognise my finger pressing on the crown sometimes.
Then it will sort of work for a few seconds then glitch again.
I can still get a good reading - after about 10 to 15 tries…

WatchOS up to date and clean and undamaged.
Everything else works fine, although the screen is sometimes unresponsive to touch until I press the crown twice.
So same question for you: is the heart rate/pulse still recording accurately?
To me it sounds like a failing sensor…
You could contact Apple support and they could run a diagnostics…
 
Yes. Other functions are working normally. Battery health is down to 81% so I’ll replace the watch when the new series ships.
 
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Yes. Other functions are working normally. Battery health is down to 81% so I’ll replace the watch when the new series ships.
A possible good thing is that when I've traded in old Apple watches, the calculator on the ordering page doesn't ask if the ECG function works. Not sure if they run diagnostics when Apple receives it, but you could end up getting the full trade-in value when you buy your new one.
 
i definitely had one apple watch that this happened to. i don't remember what series it was, but it could have been a 6.
 
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