iPhone 17 Pro: Overheating, fast drain, 'Screen' usage
I’m looking for advice and to see if others are experiencing the same issue.
Device: iPhone 17 Pro (new, purchased Feb 9 from carrier)
iOS: 26.3 (issue started recently / after first CarPlay navigation day)
Symptoms:
- Phone gets very hot while idle, and battery drains extremely fast even with the screen off.
- Example: battery dropped from ~80% to ~69% in ~40 minutes with no active use.
- The Battery screen sometimes shows “Screen” as the top consumer even though I’m not using the phone.
- While charging via cable, the phone can become extremely hot and I’ve seen the “Charging On Hold” (thermally limited charging) message.
- At one point it felt hot even when the phone was powered off and charging (after it cooled down, unplugged it cooled further).
What I’ve tried:
- Full restore / reset (set up again) – no real improvement.
- Turned off Live Activities (it removed everything from the lock screen except the clock).
- Disabled Location Services, Wi-Fi, mobile data, Bluetooth, background app refresh/sync for testing.
- Still seeing significant idle drain and heat.
Notes:
- The issue seemed to begin after the first day I used Apple Maps navigation via CarPlay, but it persists even after a full restore.
- Unplugging from the charger helps it cool down, but the battery drain continues.
Questions:
- Has anyone seen a similar “Screen / Home & Lock Screen” style drain on iOS 26.3 with overheating?
- Any known fixes/workarounds beyond disabling Live Activities / Always-On / StandBy?
- Could this indicate a hardware/battery/charging circuit issue even though basic diagnostics reported no hardware problems?
iPhone 17 Pro, iOS 26
