Why Xiaomi smartphone warms up: causes of overheating and ways to eliminate

Your Xiaomi is hot like an iron and your battery goes down in hours? Overheating is one of the most common problems with Redmi devices, POCO It's not always a sign of a breakdown, but 80 percent of the time it's a software failure, a misset, or an external factor that can be fixed on its own.

In this article, we will look at all possible causes of overheating, from the harmless (such as playing at maximum settings) to the critical (failure of the battery or processor). MIUI, What apps are most often to blame for heating, and what to do if the phone is warming even in standby mode. 4/5, Mi 8) We will give some recommendations – their “iron” requires a special approach.

Spoiler: If your Xiaomi heats up to 45-50°C when charging or heavy use is normal for most modern smartphones, but if the temperature is above 55°C, and the device begins to brake or turn off, it is time to sound the alarm.

1. Normal temperature vs. overheating: when to sound the alarm

Before we panic, let's figure out what temperature Xiaomi considers acceptable and what is dangerous.°C to 45°C. However, in practice:

• 📱 30–40°C - the norm for light load (social networks, instant messengers, watching video).
• 🎮 40–50°C – permissible for games, shooting video in 4K Charging (especially on Quick Charge 4)+).
• ⚠️ 50–55°C is critical area. At this temperature, trottling is triggered, and the battery degrades 2-3 times faster.
• 🔥 Above 55.°C is emergency mode. The smartphone may turn off, a warning will appear: "Temperature is too high".

How do you check the temperature? MIUI There's a hidden tool: type in the Phone app the combination ##4636##, then select Battery Information. Alternatively, apps like AIDA64 or CPU Monitor.

⚠️ Note: If the processor temperature exceeds 60°C in standby mode (screen off, no active tasks), this is a 100% hardware problem – most likely a faulty battery or the thermal paste under the chipset has dried up.

2. Program causes of overheating: what we remove first

60 percent of the time, it's the software. Even if your Xiaomi is new, the factory settings are the fault. MIUI And the background processes can make the processor work at its limits:

Background applications and autoloading

MIUI The system aggressively caches apps and keeps them in memory even when they are not needed.For example, Facebook, Instagram or TikTok can consume up to 20% CPU background!

How to clean:

1. Go to Settings → Applications → Application Management.
2. Sort by Use. CPU (tap three points up there).
3. Close applications that consume >10% of the processor (except system).
4. Turn off autoboot: Settings → Battery and productivity → Autostart control.

2.2 Viruses and malware

If your smartphone starts to warm up suddenly, for no apparent reason, check it for viruses. APK It's from unverified sources:

• 🕵️‍♂️ Mining cryptocurrency in the background (popular on Redmi) 4/5 weak-protection).
• 📊 Send your data to servers (consumes) CPU net).
• 🔄 Run banner ads even on a locked screen.

How to check:

1. Install Malwarebytes or Dr.Web Light (free versions are enough).
2. Check the Settings section → Battery → Using a battery for unknown processes (e.g., high-consumption com.android.system).
3. If you find a suspicious application, delete it and reset your network settings (Settings) → SIM-maps and mobile networks → Resetting network settings).

Updates to the MIUI and firmware bugs

Xiaomi regularly releases updates, but not all are optimized. MIUI 14 Many Redmi Note users 10/11 Complained overheating due to a bug with Mediatek Helio G95. And MIUI 13 There was a problem with the Thermal Engine (cooling system) that kept the phone warm even when you simply scrolled through Instagram.

What to do:

• 🔄 Check for updates: Settings → The phone. → Updating the system.
• 📉 If overheating began after the update - roll back to the previous version (instruction below).
• 🛠️ For advanced: disable the Thermal Engine through ADB (Adb shell settings put global thermal_level 0).

3. Hardware causes: when the "iron" is to blame

If the software methods didn't work, the problem is the hardware, and most of the time, it's the hardware.

Critical fact: Xiaomi models on Snapdragon processors 8xx (Like Mi. 10/11, Black Shark: Overheating is often due to malfunctioning of the Adreno graphics core. If the phone is warmed up when playing games or rendering videos, it's almost always the fault GPU.

Battery: How to know if it is "dead"

Lithium polymer batteries degrade over time, and after 300 to 500 charging cycles, their capacity drops by 20 to 30 percent, and internal resistance rises, which is what causes them to overheat.

• 🔋 Charge drops from 100% to 80% in 30-40 minutes without loading.
• 🌡️ The phone warms up even at 10-20% charge.
• 📉 B Settings → Battery → The state of the container shows <3000 mAch (for Redmi Note) 10 Pro — 5020 mic).

The solution is to replace the battery, which in Xiaomi’s official service centers costs 1500-3000.₽ (Self-replacement is possible, but it is risky, as it can damage the plumes or the power controller.

⚠️ Warning: If the battery is swollen (the phone body has become a "bubbly"), immediately turn off the device and do not use it until it is replaced!

Thermopaste: why it dries and what to do

Thermopaste is a heat-conducting material between the processor and the radiator, and it dries out over time, especially in active-cooled phones (e.g., phones with a heat-conducting cooling system, POCO F3 GT or Black Shark:

• 📈 Temperatures rise faster than usual (for example, from 30 to 30).°C to 50°C in 5 minutes of play).
• 🔄 The phone starts to brake when heated (trottling works earlier).
• 🕒 The problem is worse after 1.5-2 years of use.

The solution is to replace the heat paste, and it's 1,000 to 2000 times a service center.₽. If you decide to do it yourself:

1. Buy a thermal paste with high thermal conductivity (for example, Arctic). MX-4).
2. Take the phone apart (you need a plastic mediator and a hair dryer to undo the plumes).
3. Clean the old paste with alcohol, apply the new thin layer (no more rice grain!).

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If you're not sure, don't take the risk. If you don't replace the heat paste correctly, you can overheat the chipset and your phone will fail.

4.Overheating while charging: why it happens and how to lower the temperature

Many Xiaomi users experience the phone warming up while charging, which is normal if the temperature is below 45.°C, but if the smartphone gets hot and charging is slow, something is wrong.

Fast charging: good or evil?

Quick Charge 4 Technology+, HyperCharge (up to) 120W Redmi Note 12 Pro+) Or Turbo Charging, which heats the phone, basically -- that's physics. The higher the power (watts), the more heat you get:

• ⚡ Original power supplies (Xiaomi or Qualcomm Certified) heat less than cheap counterparts.
• 🔌 The cable should support high power (look for labeling) USB-C to USB-C 5A).
• 📉 If the battery is discharged to 0%, the first 10-15 minutes of charging will go at maximum power - hence, strong heating.

How to reduce the temperature when charging:

1. Use the charger. 18W instead 30W/67W (For example, the block from the iPhone).
2. Remove the case (especially silicone – it retains heat).
3. Do not use your phone while charging (even a simple scrolling of the tape in TikTok increases heating by 10-15).°C).
4. Turn on the plane mode or energy saving.

Wireless charging: why it heats up more

If you have a Xiaomi 13 Pro, Mix 4 or other Qi-charged model, know that wireless charging is always less efficient and warms more than wired charging.

• 🔄 Energy loss for conversion (up to 30% of heat goes into the air»).
• 🧲 The induction coil heats up on its own.
• 📱 The phone can not “breathe” – lies on the charge tightly.

Advice:

• Use the original Xiaomi charging stations (they are optimized for the same price). MIUI).
• Do not put your phone on soft surfaces (sofa, bed) – this blocks ventilation.
• If the temperature is above 45°C - switch to wired charging.

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If your Xiaomi is warming up while charging, but the temperature does not exceed 45°C is normal, as long as the charge is not interrupted due to overheating (this is a sign of a malfunction of the battery or power supply).

5.Overheating in Games: How to Play Without Risk to Your Phone

Xiaomi is a popular choice among gamers thanks to powerful chipsets (Snapdragon) 8 Gen 2, Dimensity 9000) and high frequency of screen refresh (120/144 But games like Genshin Impact, Call of Duty Mobile or something like that, or something like that. PUBG At maximum settings, the processor can be heated to 60°C's 20 minute.

How to play without overheating:

For owners. POCO F3/F4 GT or Redmi K50 Gaming: these models have a built-in cooling mode. Activate it in Settings → Special facilities → Game mode → Cooling.

⚠️ Warning: If the game is lagging and warming even at minimal settings, check the heat paste (see section). 3.2). This is a typical problem for Snapdragon. 888/8 Gen 1, Those who are stronger than their predecessors.

6.Overheating on standby: hidden culprits

If your phone is warming even when you’re not using it (the screen is off, there are no active tasks), the problem lies in one of three:

1. Background synchronization (mail, cloud services).
2. Poorly optimized applications (especially Chinese ones: AliExpress, TikTok, Shein).
3. Modems malfunction (constant network search) 4G/5G).

How to diagnose:

1. Go to Settings → Battery → Battery Use.
2. See which apps have been using power in the last 6 to 12 hours (even when the phone has been locked).
3. If you see unknown processes (e.g., high-consumption com.android.phone), it could be a virus or modem crash.

Decisions:

• 🔄 Turn off autosynchronization for unnecessary accounts (Settings) → Accounts. → Synchronization).
• 📵 Put the phone in mode. 3G (if 4G/5G not required: Settings → SIM-maps and mobile networks → Preferred type of network → 3G.
• 🗑️ Remove or freeze (through) ADB) suspect-appendix.

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If you can’t find the culprit, try safe mode: press the power button. → Safe mode. It only runs system applications. If the overheating is gone, it's third-party software.

7. Features of overheating on older Xiaomi models

If you have a Redmi Note 4/5, Mi A1/A2 or 2016–2018 Overheating is almost normal:

• 🔋 Old batteries (capacity fell to 60-70% of the factory).
• 🖥️ Outdated Processors (Snapdragon) 625/636, Helio X20), Not optimized for modern applications.
• 📦 Rent memory (on 16/32 GB stays. <1 GB of free space).

What to do:

• 🧹 Clear the cache: Settings → Memory. → Clear the cache.
• 🔄 Back on. MIUI 11/12 (New versions are too heavy for old iron).
• 🔋 Replace the battery (costs 800-1500)₽, But it will prolong the life of the phone for a year or two).
• 📱 Use lightweight versions of applications (Facebook Lite, Messenger Lite).

⚠️ Attention: On the Redmi Note 4X (Snapdragon 625) often fails the power controller. Symptoms: the phone warms, does not charge or turns off when you connect the cable.₽).

8.When to contact the service: signs of serious malfunctions

If you've tried all the tips, but Xiaomi is still warming like an iron, it's time to bring it to the service.

• 🔥 The phone turns off when heated (even without warning).
• 📉 Battery swelling (body deformed).
• 🖥️ On the screen appear artifacts (stripes, flickers) when heated.
• 🔌 Charging does not go or goes only in the off state.
• 🌡️ Temperatures are over 60.°C on standby.

Average repair prices in official Xiaomi service centers (2026):

If the phone is warranty, don't take it apart! Opening the case will void the warranty. Contact an authorized service center (the list is available on the Xiaomi website).

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Before visiting the service, make a data backup and reset the phone to factory settings (Settings) → The phone. → Resetting settings. This will speed up the diagnosis and eliminate software errors.

FAQ: Frequent questions about Xiaomi overheating