Samsung Galaxy Overheating

All electronic devices generate heat. This is a fact of science. But if they are hotter than normal, touching your phone is uncomfortable, or a thermal warning shows on screen, this could be cause for concern. With any luck, the fixes on this page will have your phone running cool as a cucumber.

Before undertaking any of the more time-consuming solutions below, these are a few fundamentals to give a go.

• Remove it from the charger, particularly if you are charging wirelessly. Wireless charging is less efficient and therefore generates more heat as a byproduct.
• Close high power consumption apps like GPS, games, or cloud sync services.
• Update your software. A newer version of Android or a third-party app could be poorly optimized and an update may resolve this.

Phones are devices with very little headroom to dissipate the heat they generate. Think about a computer, which typically has fans to move air around inside. Galaxy phones don’t have room for this sort of cooling and must relieve thermal buildup passively.

• Move to a cooler environment. It may just be that a high ambient temperature is forcing a hotter internal temperature.
• Remove your case, especially if it is one that envelopes the entire phone. It could be trapping heat in.
• For more rapid cooling, turn your device off.

Batteries are one of the major sources of heat in a phone due to the constant energy exchange within them. If your battery is failing, or at the end of its life, it may generate more heat than normal.

• Check your battery health. Samsung's official method of testing this is using the Samsung Members app, but a third party app will give you more data. Accubattery gives a wide range of statistics to base decisions on.
• Search for signs of battery swelling. Is there localized screen discoloration? Is the screen lifting along one side?
• Replace the battery if there are any indications of failure. Exercise caution when handling the battery—lithium-ion batteries can be hazardous if they are damaged.

In order for you to get an overheating warning, something in your phone has to know the temperature exceeds expectations.

• Sensors on the charge port assembly are common triggers. Open your device and unplug your charge port from the logic board. Reference the repair guide for your phone if you're not sure which cable this is. Power it up and see if you still get a warning. Replace the charge port assembly if this resolves the issue.
• Other parts may also have thermal sensors, but they are not as well documented. If you are feeling adventurous, try disconnecting other components. The main flex cable (which carries signals from the daughterboard to the mainboard), camera, wireless charge coil or other major components are prime suspects.

One of the electrical lines in your phone may have developed a short-to-ground. This simply means that rather than energy being held in its circuit, it is sent straight to the ground.

• This may be the case if your phone got very hot and now will not power on.
• Attempt to find the short by booting on a minimal hardware configuration.
  1. Open up the device and disconnect anything that is not necessary for you to power the phone on. For most Samsung phones, this means keeping battery, display and the power button connected.
  2. Try to power the phone on.
  3. If the phone boots normally on the minimal setup, reconnect the parts one by one. Power off and disconnect the battery while you connect any additional parts. Be especially suspicious of the home button and front-facing camera cables.
• If the issue reappears after connecting a specific part, replace that one.
• If the issue is still present after this, your issue is likely the board itself.

Ultimately, all the temperature information travels to the logic board. The board is also home to many sensors itself. A poor electrical connection, faulty board sensor, or even a misbehaving chip could be your issue.

• Board-level issues are most easily corrected by replacing the board.
• Contrary to popular belief, the board itself can be repaired. However, it requires specialized tools and microsoldering know-how. This is not something most people can do themselves, but many independent repair shops can do it for you! Ask around to find board-level repair specialists near you.

• Where Is the Temperature Sensor That Stops the Phone From Charging