iPhone 15 overheating

Hi everyone. I’ve recently purchased the new iPhone 15 pro max and it is heating up even when I’m not using it.

I was wondering if anyone else is having this issue or if it maybe a setting that is causing it that I can turn off?

Any advice is appreciated. :)


[Re-Titled by Moderator]

iPhone 11 Pro, iOS 16

Posted on Sep 22, 2023 6:04 PM

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Question marked as Top-ranking reply

Posted on Sep 24, 2023 9:36 AM

For all of you:


Do a simple Forced Restart on your new iPhone by:


  • Press and quickly release the volume up button
  • Then immediately press and quickly release the volume down button
  • Then immediately press and KEEP HOLDING the side power button and KEEP HOLDING it past the swipe to shut down and KEEP HOLDING it until the Apple Logo appears, then let go


Sign back in with your passcode when the phone prompt you and let the phone settle down over the next couple days. If you transferred a LOT of data, it can days for the indexing process to complete. There is likely NOTHING wrong with your phones.

935 replies

Dec 9, 2023 2:20 PM in response to vitallia

vitallia wrote:

That’s not great advice. Most people here are expressing that this is happening multiple times not just within the two days of getting a new phone and transferring a bunch of data. An $1,100.00 dollar device should not be randomly spiking in temperature with a month of purchase.

For the vast majority of people, whatever advice you're suggesting is not good is actually just fine. If however, a phone is randomly actually "overheating" in that the phone needs to cool down in order to continue using it (the temperature symbol is actually displayed on the screen) is happening a month later, then logic suggests they should have the phone tested at their Apple Store Genius Bar.

Sep 24, 2023 10:21 AM in response to arcane93

Yes, I've read every post. But my comment about the phone heating up while charging wasn't directly at you or anything you've posted. It was directed at dhrijyoti who seemed concerned their phone was getting warm while being charged. And it's normal for a phone to warm while being charged.


If you think there is an issue with your new phone, instead of complaining on a user to user only forum, schedule an appointment at your Apple Store Genius Bar and let Apple run diagnostics on it. We can't test your phone. And continuing to express concern here on this forum is going to get you nothing.

Sep 24, 2023 5:02 PM in response to Ruthy-Roo

If the phone overheats enough to be a problem it will self-protect, initially by suspending charging or in more extreme cases throwing a temperature alarm. Note that the operating temperature range is much higher than you might expect,

If your iPhone or iPad gets too hot or too cold - Apple Support


As a rough guide, 45C is probably about the temperature of hot water in which you could hold your hands. 55C is about the temperature of a coffee mug you don't want to hold for too long.


If you think there is a problem with your new phone, please contact Apple Support and arrange to get it checked by the paid staff technicians. If you are lucky they might be able to get the initial diagnostics over the air without you having to visit the Genius Bar at your local Apple Store.

Sep 28, 2023 1:35 PM in response to Alvin_Lo

A software fix will be to reduce the temperature at which the A17 throttles. This will negatively affect performance of phones that have A17 chips that were binned as higher TDP (thermal design power) devices while not affecting the performance of phones with lower-power A17 chips. You may be fine with lowering the performance but not everyone may feel that way. Perhaps there should be a setting where the user can choose the level of performance versus temperature.


It is not a counter-technology trend for chips to get hotter. The A17 has about 3 million more transistors than the A16. Even though the A17 is fabricated on a 3nm process, versus 4nm for the A16, that does not mean lower thermals, it just means you can cram more transistors on the same size die. Leakage power goes up as the process shrinks and the power per transistor doesn't change much, but the total power goes up as the transistor count increases.


With any processor, they are tested after production for performance and power consumption, and processors that fall within an acceptable range go into the final product, but they are not all exactly the same. This is likely why some 15 Pro/Pro Max owners have no problem at all while others are experiencing the overheating.


The reality is that it's better to wait a while after a new device comes out so that any early problems can be addressed. There could be modifications to the thermal system that improve things but it will not be changes that can be retrofitted. As the TSMC 3nm process is tweaked there will be improvements in the yield of lower-power A17 processors.

Sep 28, 2023 1:39 PM in response to konrad168

My battery doesn't ever drop at night. I do what Apple recommends and my phone is on it's MagSafe Charger when I go to bed, every night, all night. My phone backs up nightly and is ready for a full days use in the morning, with Optimized Battery Charging on.


I would, however, expect a brand new iPhone, which isn't plugged in at night to lose some charge, maybe even more charge initially as it indexes all the billions and billions of bytes of data on the phone. Other things which could be eating the battery at night is what you've got it set as far as cellular. If for example, you have it set to 5G always and 5G isn't very strong in your house, the phone will work VERY hard to find a good cellular connection, which can chew up the charge in the battery. How many of your apps have you granted location access to? Location Services can adversely affect battery life. There are a lot of variables at play.


Honestly, you should plug your phone in at night and wake up to a backed up phone, ready for a full days use. And this

is exactly what Apple recommends you do.


BTW, following Apple's charging advice the iPhone 14 Pro Max I just traded in on the 15 Pro Max still had a Battery Health reading of 100% after a full years use.

Sep 29, 2023 11:11 AM in response to Ruthy-Roo

I got a 15 Pro and Accessibility is turned off, and it still gets hot within 5 minutes of facetime or video chat. I called Apple support, and they just told me since it is not giving a warning of overheating it is OK. I have tried every possible combination of plugged in to charger or just in battery, using phone data or over Wi-Fi. It doesn't matter it is heating up and very hot to handle after 20 minutes of video chat. I do lots of video meeting and this is not helping. I had an iPhone 13 and just bought the 15 Pro on the 22nd and its not making me happy. I am thinking of switching it to 15 or 15 Plus since I do not see anybody reported problem on those models.

Either the 17-Bionic chip or the Platinum edge might be doing this, but I am not a pro. Rather not take the risk and switch to regular before the 14 days are over.

Sep 29, 2023 5:24 PM in response to lobsterghost1

Indeed, I think that Apple has one of the best if not the best support which is not only virtual but you can take your iphone to a store, so if you have a problem with your just bought iphone I'd expect you would rush back to the store rather than posting on a forum. At the store your iphone can be tested and it's covered by a no fuss warranty. So the cases tested at the store could count as overheating iphone cases rather than what people might think or feel after a few hours or days using the new iphone.

Sep 29, 2023 6:59 PM in response to Blindside666

Blindside666 wrote:

So if I understand you correctly, this is no longer going to be an issue after the phone is completed with its initial indexing? Just wanna make sure because you sound like you know what you’re talking about.

I can't guarantee you anything. But if my experience and the experience of just about everyone I know who now owns an iPhone 15 model, once indexing is fully complete, the phone seems to be working just fine and just as I expected a new iPhone to work. Did my iPhone get warm at first? Yes. Does it get warm under normal tasks now? No. And yesterday, I was on a call for nearly an hour and my phone didn't even get warm. Today, I streamed music for a full hour (maybe longer) and it was just slightly warm as I would have expected it to be.

Sep 30, 2023 9:40 AM in response to angelafromhammond

As stated by many professionals. There is no mystery the 3 nm chip runs hot. Yields were raised by accepting chips with more imperfection that require more wattage(there are literally thermal images of the chip as the cause). The phone was surrounded by titanium which is an order of magnitude less thermally conductive. There is no software fix other than to throttle the phones performance. This was all posted by professionals, and experts in the field on Monday. They can turn the dial down on the oven, they won’t apologize for the oven, the hardware will remain the same for early adopters. Chip binning has always been a thing for this reason. So has heat dissipation by manufacturers. Not only is the cause, order of events and the science well documented, the benchmarks post “fix” will confirm what is already clear. A chip cannot be mended by software, it can simply be made to draw less power and produce less FLOPS.

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iPhone 15 overheating

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