iPhone 14 overheating "Temperature" warning after iOS 27.0.1 update. Any fixes?

Did you already try to force restart your iPhone after the recent iOS update?

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1. Press and quickly release the volume up button.
2. Press and quickly release the volume down button.
3. Press and hold the side button.
4. When the Apple logo appears, release the side button.

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copied from: Force restart iPhone - Apple Support

If this does not fix the temperature warning on your iPhone and the iPhone is not getting warmer at all, you should contact the official Apple Support about that, they can diagnose your iPhone online, to find the reason for that.

Contact Apple Support - Apple Support

Welcome and thank you for reaching out. 🤗

It is normal for an iPhone to run warmer than usual for a day or two after a major iOS update due to background processes like indexing.

However, if the issue persists, there are several steps you can take to resolve it:

• Wait it out — Background tasks like photo indexing and data syncing can cause the phone to heat up temporarily after an update.
• Update your apps — Third-party apps may need updates to run efficiently on the new iOS version. Check the App Store for any available updates.
• Check your charger — Using a high-wattage charger can cause the phone to heat up. Try using a standard 20W charger or a different power source.
• Remove the case — Some cases can trap heat and prevent the phone from cooling down properly.
• Enable Low Power Mode — This reduces background activity and can help lower the phone's temperature.

If your iPhone continues to overheat, you may want to contact Apple Support for further assistance.

Good Luck! 👋🏼😉

Smiliñ 😎 Brian | Community Volunteer