The situation where the body of a smartphone becomes unpleasantly hot is familiar to many owners of Xiaomi, Redmi and Poco devices. This can occur during charging, after installing updates or during the game. Heat generation is a natural process of electronics, but excessive heating signals software failures or hardware problems.
If you notice that the gadget is rapidly discharged and the interfaces are slowing down, these are direct signs that the system is working at its limit. It is important not to ignore these signals, since constant overheating can lead to battery degradation and motherboard failure. In this article, we will discuss specific steps to diagnose and fix the malfunction.
You don't have to panic right away. Most of the time, the problem is solved by software without going to the service center, and let's look at the root causes and the ways to fix them.
The main reasons for heating the body
The first step to solving this problem is to understand the source of the heat, and the processor is the main heat generator in any modern device, and when you run demanding applications or games, it starts operating at high frequencies, which inevitably leads to a rise in temperature, which is a normal physical reaction if the body heats up moderately.
But there is a software factor: MIUI or HyperOS shell optimization sometimes works incorrectly, causing background processes to waste resources. The most common cause of sudden heating after an update is background file re-indexing and application optimization, which can last up to 48 hours.
Also, you need to consider the external conditions: direct sunlight, using covers with poor heat transfer or being in a room with high air temperature aggravate the situation, and the cooling system of the smartphone does not always cope with the combination of external and internal factors.
- 🔥 High load: starting heavy 3D-games, video editing or navigation.
- 📡 Bad Network Signal: The Communication Module is Working at the Power Limit to Find a Base Station.
- 🔋 Fast charging: using original high power units (67W, 120W) always heats up.
- 📱 Background processes: viruses or “hung” applications consume processor resources.
It is important to distinguish whether the phone is warming evenly or there are local heating points. If the hot spot is at the top of the case, this usually indicates the processor is working.
⚠️ Warning: If the phone gets heated to a point where it hurts to hold it, or if a critical temperature is reported, turn off the device immediately.
Software Refrigeration Methods and Optimization
If you don't have physical impact, you have to do the software part. There's a built-in Security tool in Xiaomi's shell that helps you manage resources. Go to the app menu and select Clean up or Accelerate, which will complete the unnecessary background processes.
The next step is to analyze the battery usage statistics. Go to Settings → Battery and see which application consumes the most power. Often, a rarely used program eats up the charge and heats the phone due to a code error.
For a deeper setup, you can use CPU modes. In Settings → Advanced Settings → Modes of operation (or through the Game Turbo app), select the Balanced profile instead of Performance profile, which will limit the maximum CPU frequency, reducing heat generation.
☑️ Checklist of fast optimization
Don’t forget to update your system software regularly. Xiaomi engineers often release patches that fix power management errors. Check for updates in Settings → About the phone.
Display and network settings
The screen and communication modules are two of the main consumers of power after the processor. The high refresh rate of the screen (90 Hz, 120 Hz or 144 Hz) significantly increases the load on the GPU. If you are not an avid gamer, it makes sense to switch to a standard 60 Hz.
Do this through the Settings path → Screen → Update frequency. Also reduce the time before going to sleep. The brightness of the screen is better kept automatic, but in hot weather, the forced dimming of brightness will help lower the temperature.
| Parameter | Impact on heating | Recommended value |
|---|---|---|
| Frequency of update | High. | 60 Hz (for savings) |
| Screen resolution | Average. | Standard (FHD+) |
| Brightness | Average. | Car or 50% |
| Animation. | Low. | 0.5x or Disconnected |
Searching the net 5G or work in an area of uncertain reception 4G It makes the modem run at maximum power, if in your area. 5G not developed, disable this mode in the settings SIM-Path: Settings → SIM-maps and mobile networks → Preferred type of network.
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Turn off the “Always On Display” feature for a while if the phone is warmed in standby mode, which will significantly reduce the load on the battery and processor.
Charging rules to prevent overheating
Charging is a chemical process that always produces heat. Xiaomi HyperCharge’s fast charging technology makes it even more intense. To minimize risks, don’t cover your phone while charging with a blanket or put it on soft surfaces.
Use only original cables and power supplies. Cheap counterparts don't have the necessary protection controllers and can deliver unstable current, which causes the power controller to overheat. If the phone is hot before connecting to the grid, let it cool.
⚠️ Warning: Never play heavy games while charging.The combination of CPU load and charging current is a guaranteed way to overheat the device and blow up the battery.
There's a myth that you need to discharge your phone to 0%. For today's Li-Po and Li-Ion batteries, it's bad. Try to keep your charge in the range of 20% to 80%. MIUI has an Optimized Charging feature that's worth activating.
Actions in critical overheating
If the phone is already overheated and it's giving you a warning, the algorithm should be clear. First of all, turn off the screen and remove the device from the case. Cases, especially silicone and leather, work like a thermal insulator, keeping the heat from coming out.
Put your smartphone on airplane mode. This will shut down all radios, which are a powerful source of heat. If things don't improve after 5-10 minutes, perform a forced reboot. For most Xiaomi models, this is a long pressing of the power button (10-15 seconds).
Can I put my phone in the refrigerator?
Check the list of newly installed applications. If the problem started after installing a program, delete it. Sometimes malware can mine cryptocurrency in the background using 100% of the CPU resources.
When repairs are needed
If the phone is not always the problem with the software, even when it's off (when charging is connected), or if the heat is localized to one small point on the board, it's a sign of hardware failure, and thermopaste may be degraded or the processor dump may be.
Battery bloating is another worrying symptom, and if the back of the phone has moved away or the screen has started to bulge, stop using the device immediately, and these batteries are fire-prone.
It’s also worth contacting the service if the phone loses the network, spontaneously restarts or quickly discharges in standby mode, which, combined with heat, indicate a malfunction of the motherboard.
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Software methods help 90 percent of the time, and if cleaning up the data, resetting the settings, and flashing it, it doesn't fix the heat, it's a hardware problem, and it requires an engineer to do it.