Your iPhone operates safely between 32°F and 95°F (0°C–35°C). Most people never think about that until the phone feels too hot to hold or an on-screen warning appears. During a long FaceTime call with the phone plugged in, the back grew uncomfortably warm in under 15 minutes — then the screen dimmed automatically. That’s iOS entering thermal protection mode, and it’s a signal something needs to change.
iPhone overheating is one of the most-searched iOS problems and spikes after every major software update. The good news: every cause here has a straightforward fix, and most take under five minutes to apply.
Quick Answer
Remove the case, move to a cooler location, and close background apps. If you’re charging while using the phone, unplug immediately and wait 10 minutes. For recurring overheating, check Location Services and Background App Refresh in Settings — a rogue app running in the background is the most common cause.
1. Processor-Intensive Apps Running Unchecked
Video editing, AR apps, 3D games, and GPS navigation push the A-series chip hard. Under sustained load — especially inside a heat-trapping case — temperatures rise quickly.
How to fix it
- Open App Switcher (swipe up from the bottom on Face ID models, or double-press Home) and swipe away any apps you’re not actively using.
- During gaming or AR sessions, take 5-minute breaks every 20–30 minutes.
- Remove the case during intensive use — iPhone’s aluminum frame is designed to conduct heat away from the chip.
Pro tip: Go to Settings → Battery and check per-app power usage. Any app consuming 40% or more of battery in the background is almost certainly the heat source.
2. Charging While Using the Phone
Charging generates heat independently. Add an active display and a demanding app, and heat stacks up fast — this combination most reliably triggers iOS’s temperature warning.
How to fix it
- Unplug and let the phone cool for at least 10 minutes before resuming use.
- Avoid streaming video or running Maps while charging.
- Use only Apple or MFi-certified chargers — uncertified models run hotter. If you’re also seeing slow charging, see our guide to iPhone charging problems.
- Enable Optimized Battery Charging: Settings → Battery → Battery Health & Charging.
Troubleshooting tip: When the temperature warning appears, iOS stops charging automatically. Place the phone face-down on a flat surface in a cool room and wait 5–10 minutes. Do not put it in the freezer — rapid cooling causes condensation that can damage internal components.
3. Location Services Set to “Always”
GPS is one of the most power-intensive components in an iPhone. A single app left on “Always” location access polls the GPS chip continuously, raising device temperature noticeably over time.
How to fix it
- Go to Settings → Privacy & Security → Location Services.
- Change any app showing “Always” to While Using the App unless you have a specific reason (Find My, emergency SOS apps).
- Disable Precise Location for apps that don’t need an exact position — weather and shopping apps work fine with approximate location.
4. Background App Refresh Enabled for Too Many Apps
With Background App Refresh active for many apps, your iPhone constantly fetches data — taxing the processor and network radio even when the screen is off.
How to fix it
- Go to Settings → General → Background App Refresh.
- Change the top setting to Wi-Fi only, or disable it entirely.
- Scroll through the app list and turn off refresh for games, photo editors, and shopping apps.
5. A Software Bug or Post-Update Indexing
iPhones often run warmer for 24–48 hours after a major iOS update while Spotlight re-indexes and iCloud Photos syncs. A genuine bug can cause runaway CPU usage that persists well beyond that window.
How to fix it
- Go to Settings → General → Software Update — Apple patches thermal regressions quickly in point releases.
- After a big update, leave the phone on Wi-Fi and plugged in overnight so background tasks can finish before heavy use.
- If overheating started with a specific iOS version, check Apple’s community forums for confirmed bug reports and a timeline for a fix.
6. Direct Sunlight or Environmental Heat
An iPhone left on a car dashboard in summer can exceed its safe temperature range in minutes, even with the screen off. The glass back absorbs radiant heat rapidly, and a dark case speeds things up further.
How to fix it
- Keep the phone in a bag or pocket when outdoors — never on a surface in direct sunlight.
- Never leave it in a parked car; interior temperatures can reach 130°F (54°C) or higher on a warm day.
- If it has already overheated outdoors, move it to shade and allow it to cool naturally.
When Warmth Is Normal vs. a Problem
| Scenario | Normal? | What to Do |
|---|---|---|
| Warm during a 20-minute call | Yes | Nothing needed |
| Hot during GPS navigation + charging | No | Unplug; close Maps between turns |
| Temperature warning on screen | No | Unplug; cool in shade 5–10 min |
| Warm while an iOS update installs | Yes | Let it complete |
| Hot with no apps open | No | Check Battery usage; force restart |
Common Mistakes to Avoid
- Putting it in the freezer. Rapid cooling causes condensation inside the device. Cool at room temperature only.
- Ignoring the temperature warning. iOS will shut down the device to protect hardware. Close the offending app before dismissing the alert.
- Leaving the case on while cooling. Rubber and folio cases trap heat significantly — remove the case to help the phone cool faster.
- Using uncertified chargers. Cheap third-party chargers run hotter than certified ones and amplify overheating during charging. Switch to an Apple or MFi-certified option.
- Skipping battery health checks. A battery below 80% capacity generates more heat under the same load. Check Settings → Battery → Battery Health & Charging periodically.
Frequently Asked Questions
Is it normal for my iPhone to get warm while charging?
Mild warmth during fast charging is expected. Hot to the touch — or an on-screen temperature warning — is not normal. Unplug and let the phone cool before resuming use.
Can overheating permanently damage an iPhone?
Yes. Apple states that sustained temperatures above 95°F (35°C) can permanently reduce battery capacity. Recurring overheating accelerates battery aging noticeably over time.
Why did my iPhone overheat after a software update?
Post-update background tasks stress the CPU for 24–48 hours. If heat persists beyond two days, install any available point release — Apple addresses thermal regressions quickly.
My iPhone is overheating and losing battery fast. Are they related?
Often yes — the same rogue background app causes both symptoms. Go to Settings → Battery, find the top offender, and force-quit or delete it. Our iPhone battery drain guide covers this in detail.
Conclusion
iPhone overheating almost always traces back to one of these six causes: demanding apps, charging while in use, Always-On location tracking, background refresh overload, a software bug, or environmental heat. Work through the fixes in order — most users find relief after the first two or three steps.
If the heat keeps returning, our guides on iPhone battery drain and iPhone charging issues often point to the same root cause. Fix the background app and both problems usually disappear together.
Last updated: June 23, 2026