iPhone 15 Pro Max shows false temperature warning after iOS 27 update
Device: iPhone 15 Pro Max (iPhone16,2), iOS 27.0.1 (24A446)
Problem: A temperature warning appears randomly while the phone is cool to the touch. The phone is not charging, not in the sun, and not under heavy use when it happens.
Timeline:
- It started right after I updated to iOS 27.0 (24A437). The phone never showed this warning before the update.
- I updated to iOS 27.0.1 (24A446) on 28 Sep 2026. The problem is still there.
What I found in Analytics Data (Settings > Privacy & Security > Analytics & Improvements > Analytics Data):
- Several apps were killed with code 0xC00010FF and "Thermal State: critical", even when the phone was idle. Example: Google app, 25 Sep 2026 05:53 (UTC+5), app suspended in the background, "Thermal Sensors: 0".
- Other examples: Snapchat 24 Sep 22:29, Instagram 25 Sep 00:57, Instagram 26 Sep 19:01.
- No panic-full logs and no unexpected restarts.
- Battery health is 99%, 411 cycles.
This looks like a false temperature reading, either from a sensor or from iOS 27. Please run remote diagnostics on the thermal sensors and battery and tell me whether this is hardware or software.
I have the full analytics log files and can share them if needed.
iPhone 15 Pro Max, iOS 27
