Immediate Fix
If your device displays an Android 15 overheating warning, you must act immediately to prevent thermal throttling or hardware damage. The first step is to reduce the processor load and external heat insulation.
Remove your phone case and place the device on a cool, flat surface. Avoid placing it on fabric, which traps heat. Switch the device to Airplane Mode to kill all radio frequency activity, which is a common heat generator during post-update indexing.
| Action | Description |
|---|---|
| Kill Background Tasks | Swipe up and clear all open applications. |
| Lower Brightness | Reduce screen brightness to minimum or turn off “Extra Dim.” |
| Disable High Refresh Rate | Switch from 120Hz to 60Hz in Display settings. |
For users with technical access, forcing the system to complete its post-update optimization can stop the heating cycle. You can trigger the background optimization job manually via ADB to resolve “dexopt” heat spikes.
adb shell cmd package bg-dexopt-jobTechnical Explanation
Android 15 introduces refined resource management, but the initial upgrade triggers a “compiled-code” migration. This process involves the ART (Android Runtime) re-optimizing every installed application for the new OS version.
During this period, the CPU and NPU operate at high frequencies. If the system detects temperatures exceeding 45°C (113°F), it triggers the thermal safety layer. This results in slowed charging, dimmed screens, and eventually, a forced shutdown.
Furthermore, Android 15’s new “Private Space” and enhanced background indexing for Google Photos or File Manager can cause sustained high-load cycles. If these processes get stuck in a loop, the device will remain warm even when idle.
Alternative Methods
Boot into Safe Mode
To determine if a third-party app is causing the Android 15 overheating, boot into Safe Mode. This disables all downloaded apps. If the phone cools down, an unoptimized app is the culprit. You should update all apps via the Play Store immediately.
Reset Network Settings
Sometimes the 5G modem malfunctions after an update, constantly searching for a signal and generating heat. Resetting your network settings can refresh the handshake between the OS and the modem hardware, reducing thermal output from the radio chips.
Check Battery Usage Statistics
Navigate to Settings > Battery > Battery Usage. Look for apps with disproportionately high CPU usage. Android 15 provides a more granular view of background versus foreground drain. Force-stopping or restricting these apps can provide a permanent fix for thermal issues.