Why is my phone overheating? Causes, quick fixes, and when it's a hardware fault

Phones are designed to get warm during heavy work — gaming, video recording, navigation, fast charging, or sitting in direct sun. That's expected and passes once the load stops.

What's not normal: getting hot during light use or while idle, staying hot long after you stop, heat severe enough to trigger a 'temperature' warning, or heat paired with fast battery drain. Those point at a fault rather than a busy processor.

Most chronic overheating is a misbehaving app or background process. Work through these before assuming hardware:

• Check battery settings for an app using excessive power and force-close it
• Limit background app refresh and location access for heavy apps
• Install pending updates (overheating bugs are common and often patched)
• Let the phone cool away from sun/heat, remove the case while it cools
• If it persists, back up and try resetting settings as a last software step

Heat during charging is worth watching. A cheap or faulty charger, charging while gaming, or a worn battery can all push temperatures up. If the phone gets very hot specifically while charging, switch to a known-good charger and stop using it while it charges — and check for battery swelling.

If software fixes don't help, the cause is likely physical:

• A worn or swollen battery (swelling = stop using it now)
• A short or failing component on the logic board
• Heat that persists even after a factory reset
• Overheating alongside random shutdowns or rapid drain

Persistent overheating shortens a phone's life and can be a safety issue, so it's worth diagnosing properly. iTweak uses thermal imaging to find exactly which component is overheating — battery versus board — and shows you before any work, for Apple and Android, with warranty and a digital invoice. If we get the diagnosis wrong, you don't pay.