Did you notice that your Xiaomi is getting hot like an iron even when you're in normal use? Overheating is one of the most common complaints of smartphone owners of this brand, from the budget Redmi Note 12 to the flagship Mi 13 Ultra. In most cases, it's not a critical breakdown, but a consequence of improper operation or software failures. But you can not ignore the problem: constant overheating reduces the battery life by 2-3 times and can lead to irreversible damage to the motherboard.
In this article, we’ll look at 12 real reasons why Xiaomi is warming up, from the banal background of apps to hidden hardware defects. You’ll learn how to diagnose a problem by symptoms (for example, whether the phone is warming only when charging or constantly), what settings should be changed in MIUI, and when it’s time to carry the device to the service. All recommendations are tested on models from 2020-2026 and are relevant for MIUI 13/14/15 firmware.
1. Processor under load: games, video and multitasking
The most obvious reason for the heat is the high load on the processor. Qualcomm Snapdragon chips (for example, Snapdragon 8 Gen 2 in Xiaomi 13T) and MediaTek Dimensity (as in Redmi Note 12 Pro+) can heat up to 50-60 ° C at peak loads - this is normal for modern smartphones, but only if the temperature drops quickly after the application is closed.
What exactly is the processor loading:
- 🎮 Games with high graphics settings (Genshin Impact, Call of Duty Mobile, PUBG). Even the mid-range settings in Honor of Kings can overclock Snapdragon 778G temperature-limit.
- 🎥 Video editing in CapCut or KineMaster – rendering 4K-Video loads all processor cores.
- 🔄 Multitasking: Telegram, YouTube in the background, Google Maps with navigation and instant messengers are open at the same time.
- 🤖 Background processes MIUI, For example, system optimization or virus scanning.
How to check the load:
- Open Settings → About phone → System status → Battery temperature.
- Use monitor apps like CPU Monitor or AIDA64 (showing each kernel load).
- If the temperature of the processor exceeds 70 ° C in idle – this is a cause for concern.
⚠️ Warning: If the phone is warmed to 50°C+ When you’re just surfing Chrome or Instagram, the problem isn’t the load, but the hardware defect (see section 5).
2.Fast charging: why Xiaomi heats up when connected to the network
Xiaomi is famous for its ultra-fast charging support: the Redmi Note 12 Pro+ charges 120 watts and the Mi 11 Ultra charges 67 watts. But the higher the power, the more the battery and power controller heat up. Normal heating when charging is up to 40-45°C. If the phone gets hot (50°C+), check:
- ⚡ Do you use the original power supply? Cheap Chinese charging can give off unstable voltages, which triggers the protection and the phone warms up.
- 🔌 Cable condition: rubbed insulation or oxidized contacts increase resistance, and therefore heating.
- 📱 Background processes: if you start a game or system update during charging, the temperature can jump to critical values.
- 🔋 Battery condition: If its capacity has fallen below 80% of the factory capacity, the power controller is in a high-speed mode.
How to reduce heat during charging:
Remove the case (especially silicone)
Use the original cable and power supply
Do not play or watch videos while charging.
Turn on Fast Charging mode to only 80%, then switch to standard
Check the battery in Settings → Battery → Battery status-->
If the phone is warming up even with the original charge and when it is off, it is a sign of a malfunction of the power controller or battery, in which case only a replacement in the service center will help.
The original power supply unit
Wireless charging
Power Bank
Any suitable cable
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3. Viruses and Malware: Hidden Miners and Spies
One of the most insidious causes of overheating is hidden viruses that disguise themselves as system processes and load the processor in the background, especially if you install apps from unknown sources (not from Google Play) or download hacked games.
Signs of viral activity:
- 📈 The phone is warmed even in standby mode (screen is off).
- 🔋 The battery sits down in 2-3 hours without active use.
- 📡 Unexpected mobile data traffic (check in Settings) → SIM-maps and mobile networks → Using traffic).
- 🤖 In the list of running processes (Settings) → Annexes → There are unknown services with names like com.android.system.update or service.host.
How to check and remove viruses:
- Install an antivirus (Malwarebytes, Dr.Web Light) and scan the system.
- Check the list of applications with administrator rights: Settings → Passwords and security → Administrator rights.
- If you find suspicious software, delete it and reset your network settings (Settings → System → Settings Reset → Reset your Wi-Fi, mobile network and Bluetooth settings).
⚠️ Note: Some viruses block the installation of antiviruses. If you can't download Malwarebytes from the Play Market, try installing it through the Play Market. APK-file.
How to remove a miner if the antivirus does not help?
4. MIUI updates and firmware failures
MIUI is known for its bugs, especially after major updates, and if the phone starts to warm up right after the update, it's the software.
- 🔄 A looped optimization process after updating (phone warms and slows 1-2 days).
- 📱 Core failures, due to which the processor does not go into power saving mode.
- 🔋 Incorrect battery calibration when the system is 100% charge, but the battery is actually discharged.
How to fix it:
- Restart your phone – sometimes it solves the problem with the hanging processes.
- Check out the MIUI version in Settings → About Phone → MIUI version. If this is a beta version, roll back to stable.
- Reset the system cache: 1. Turn off the phone. 2. Press the power button + volume up until the Mi. 3 logo appears. From the Recovery menu, select Wipe Cache Partition. 4. Reboot the device.
- If nothing helps, reset to factory settings (don’t forget to make a backup!).
If the overheating started after upgrading to MIUI 14/15, check out the reviews on forums (like 4PDA or Xiaomi Community) – it may be a massive bug and Xiaomi has already released a patch.
5. Hardware malfunctions: what breaks down in Xiaomi most often
If the phone is warming for no apparent reason (no load, viruses, updates), the problem is likely to be hardware.
| Malfunction | Signs. | Models where it is more common | Cost of repair (2026) |
|---|---|---|---|
| Battery wear and tear | Heat when charging, quickly discharged, bloating the body | Redmi Note 9/10/11, Mi 9/10 | 1 500–3 000 ₽ |
| Faulty power controller | It warms even off, does not charge. | Poco X3/X4, Mi 11 Lite | 2 000–4 500 ₽ |
| CPU heater dump | Overheating at the slightest load, accidental shutdowns | Xiaomi 12/13, Black Shark | 1 000–2 500 ₽ (sticking) |
| Damage to the motherboard | Heated in one place, artifacts on the screen | Redmi K40/K50 | 5 000–15 000 ₽ |
How to diagnose a hardware problem:
- 🔍 Check the battery bloating: put the phone on a flat surface. If it sways, the battery swells.
- 🌡️ Use a thermal imager (or Thermal Camera app) to spot the heat source.
- 🛠️ If the top is warming (near the camera), the problem is in the processor or the heat paste.
⚠️ Warning: If the phone is warmed to 60°C+ and spontaneously shuts off, immediately turn it off and do not use it until repaired.
6. Incorrect settings: what to disable in MIUI
Even if the hardware is fine, the wrong settings can make the phone run to its limits.
- 🔍 Autobrightness and always on screen: in Settings → Display Turn off the screen always on and set adaptive brightness to the middle level.
- 📡 Continuous search Wi-Fi/Bluetooth: In Settings → Wi-Fi → Additionally, disable Network Search in the background.
- 🔄 Auto-Update Apps: Turn off Auto-Update on Google Play or only allow it over Wi-Fi.
- 📱 Animation and special effects: in Settings → The phone. → Version. MIUI (tap 5 times according to version to open Developer) disable Windows animation and transition animation.
- 🔋 Battery Optimization: In Settings → Battery. → Battery Optimization Select Balanced Mode (not Performance!).
It is also worth disabling unnecessary system applications that work in the background:
Settings → Applications → Application Management → System applications
Turn it off.
- Mi Video
- Mi Music
GetApps (if you don’t use a branded store)
MSA (Mi Service Framework) – if you are not using the Xiaomi cloud💡
If your phone is warming up when using mobile internet, try switching from mobile to mobile. 5G on 4G/LTE In Settings → SIM-maps and mobile networks → Preferred network type: in some regions 5G-Networks are not optimized yet, and the modem is overloaded.
7.External factors: covers, sun and humidity
Sometimes the cause of overheating is not in the phone, but in the operating environment.
- ☀️ Direct sunlight: if you leave Xiaomi on the torpedo of the car in the summer, the temperature can rise to 70°C+ 10 minutes.
- 🧤 Tight covers, especially silicone cases or metal inserts, which block the heat sink.
- 💦 Humidity: If the phone has been in water (even briefly), oxidation of the contacts leads to increased resistance and heat.
- 🔥 Heat from other devices: Do not put your smartphone near a laptop, router or charger.
How to protect your phone:
- Use perforated covers or thin transparent ones.
- Do not leave the device in the sun (even when it is turned off!).
- If the phone is wet, do not turn it on, but take it to the service for cleaning.
💡
The optimal temperature for Xiaomi is from 10 ° C to 35 ° C. At 0 ° C, the battery is quickly discharged, and at 40 ° C +, the degradation of lithium-ion cells begins.