Why Xiaomi Phone Is Heating: All the Reasons and Solutions

Have you noticed that your Xiaomi is getting hotter than usual? It may be hot even at minimal load, and the battery goes down in a few hours, POCO And Mi, but it's not always a sign of a breakdown, and 80 percent of the time, you can fix it yourself without going to a service center.

In this article, we will look at all possible causes of overheating, from the harmless (background processes, bright screen) to the critical (faulty battery, damaged motherboard), how to diagnose the problem by symptoms (for example, only the top or bottom warms), what settings will help to reduce the temperature, and when to really sound the alarm. We also collected current data from models from 2022-2026, which are more likely to suffer from overheating.

It is important: if the phone is not just warm, but hots up to 50-60°C in normal use (checked through an engineering menu or application such as AIDA64), It can lead to irreversible consequences, from the battery to the failure of the processor!

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

Any smartphone gets hot while you're working, it's a physical process, but where is the line between normal heating and dangerous overheating?

Focus on these indicators:

• 🌡️ 30–37°C - normal temperature in standby mode or for easy tasks (messaging, calls).
• 🔥 38–45°C - allowable heating during games, video shooting 4K If the temperature is short-lived and drops rapidly, you don't have to worry.
• ⚠️ 46°C and above, critical overheating. 50.°C or more triggers trottling (forced performance decline), and at 60°C the device can be turned off to avoid damage.

How to check the temperature:

1. Install the app CPU Monitor AIDA64 (There are free versions on Google Play).
2. Run the test and see the indicators for CPU, GPU battery.
3. Compare it to the norm for your model (see table below).

⚠️ Warning: If the temperature exceeds the critical point even in standby mode, turn off the phone immediately and do not use it until the cause is determined.

2. Programmatic causes of overheating (and how to eliminate them)

In 60 percent of cases, the phone is heated by software problems, such as background processes, viruses, or non-optimized applications, and the advantage of these reasons is that they can be fixed without disassembling the device.

The main culprits are:

• 🤖 Background apps: Messengers (Telegram, WhatsApp), social networks (TikTok, Instagram) and games continue to work in the background, loading the processor.
• 🦠 Viruses and malware: Some Trojans disguise themselves as system processes (e.g., com.android.system) and cause CPU work out%.
• 🔄 Auto-updates. MIUI default updates applications and system in the background, which leads to load surges.
• 🎮 Nonoptimized games: Games like Genshin Impact or Call of Duty Mobile may misuse Mali-G resources).

How to diagnose and correct:

Open "Settings" → Annexes → All applications" and sort by use CPU

Close unnecessary processes manually or through "Optimization" MIUI

Check your phone for viruses using Malwarebytes or Dr.Web

Disable Auto-Update Apps in Google Play

Reset your graphics settings for games through Game Turbo-->

If the problem persists, try resetting to factory settings (don't forget to back up!) which helps in 30% of software overheating cases.

Games.

Charging.

Use of the camera

Working in the background (without active actions)

Friendly.-->

3. Hardware causes: from battery to processor

If software methods have not worked, the problem lies in the hardware. Hardware malfunctions are more common in devices older than 2 years, but can also manifest on new phones (for example, due to marriage).

Common hardware reasons:

• 🔋 After 500-800 charging cycles, the battery loses capacity and starts to warm up. Check the wear and tear at ##4636## (Battery information menu).
• 🛠️ A damaged thermopaste, which eventually dries up, and the processor stops cooling efficiently. POCO F3 redmi K40.
• 📱 Deformed housing: After falls or impacts, the heat sink may be disturbed, leading to local overheating (for example, only the top part warms up).
• 🔌 Faulty charging port: Oxidation of contacts or damage to the charging controller causes current surges and heating.

How to identify a hardware problem:

1. Check if the phone is warming even when it’s off (if so, a battery or board problem).
2. Notice the localization of the heating: the bottom is the battery or the charging port; the top is the processor or the camera module; the back is uniformly thermointerface or cooling system.

See if the battery is swollen (close the back cover carefully - if there is a gap, it is a bad sign).

⚠️ Warning: If the phone spontaneously turns off when heated or shows a warning "Temperature too high", this is a sign of critical overheating of internal components!

4. Overheating during charging: the norm or the problem?

Many Xiaomi users complain that the phone warms up while charging, which can be both normal and a sign of malfunction, depending on the specific conditions.

When the heating during charging is normal:

• ⚡ Quick charging is used (33W, 67W, 120W). The higher the power, the more heat is released.
• 🔄 At the same time, there is charging and intensive use (games, video shooting).
• 🌡️ Ambient temperature above 25°C (for example, the phone is in the sun).

When the heat is ANOMALEN:

• 🔥 The phone warms up even when charging. 5W–10W (Slow charging should not cause strong heating).
• 📉 Charging is jerky (it connects, then disconnects) - a sign of problems with the port or cable.
• 💥 There is a smell of burning or the body becomes scorching hot.

How to charge Xiaomi without overheating:

1. Use the original cable and power supply (Chinese "no-name" charging often does not match the claimed characteristics).
2. Remove the case during charging - it worsens heat transfer.
3. Do not use your phone while charging (especially avoid games and video calls).
4. If the phone supports, turn on night charging mode (Settings) → Battery → Charging mode).

💡

If your Xiaomi supports wireless charging, remember: it always warms your phone more than wired charging. Use cable whenever possible, especially in the heat.

5. Local overheating: What's warming up in your Xiaomi

The temperature can be distributed unevenly throughout the body, and at the place of heating, you can assume which component is to blame:

For example, Xiaomi 12T The upper left side is often heated, due to the location of the Snapdragon 8 chip.+ Gen 1, which is prone to overheating. In such cases, it helps to limit performance through the developer settings (Settings). → The phone. → Version. MIUI — Tap 7 times, then return to the additional → For developers → Limit background processes).

If the lower right side is warming (like the Redmi Note 11), there's probably a battery problem.

6.How to cool Xiaomi: emergency and long-term measures

If your phone is already overheated, you need to quickly lower the temperature to avoid damage.

• ❄️ Turn off the phone for 10-15 minutes (if the temperature is above 50 minutes)°C).
• 🧊 Put it in a cool place (but not in the refrigerator!).
• 🔌 Turn off the charger and retrieve SIM-map (sometimes it interferes with heat transfer).
• 📴 Put your phone in air mode to turn off the communication modules (they too warm up).

Long-term solutions:

• 🛡️ Install a thermal paste (you need to disassemble your phone or contact the service). Best options: Arctic MX-4 Or the Thermal Grizzly Kryonaut.
• 📱 Use a cooling case with metal inserts (for example, from Baseus or Black Shark).
• ⚙️ Optimize settings: Reduce screen resolution (Settings) → Display. → Resolution. Turn off autobrightness and set the value manually (e.g. 60%). Enable power saving mode (Settings) → Battery → Energy saving regime).

⚠️ Note: Do not use external coolers (such as: USB-Xiaomi fans, they create vibrations that can damage the gyroscope or the speakers, and you'd better put your phone on a metal stand, and it'll take away the heat.

💡

If your Xiaomi is warming up because of the processor (like Snapdragon) 888/8 Gen 1), The only radical solution is to replace the thermopaste, which you can do yourself, but you need to be careful, because it's very easy to damage plumes or contacts!

7. Xiaomi models prone to overheating: TOP-5 "hot-phone

Some Xiaomi devices are warming up more than others because of the processor architecture or the failed design of the cooling system.

1. POCO F3 / Redmi K40 — It's warmed by the Snapdragon 870 and the thin body.°C in games.
2. Xiaomi 12 Pro — problems with Snapdragon 8 Gen 1, which is known for overheating. in 2022, Xiaomi released a patch, but it did not completely solve the problem.
3. Redmi Note 10 Pro – a weak cooling system + Snapdragon 732G, which is not optimized for long-term loads.
4. Black Shark 4/5 — gaming smartphones with powerful hardware, but at the same time warm up more than competitors (for example, ASUS ROG Phone).
5. Xiaomi Mi 11 Ultra – despite the ceramic body, warms up because of the Snapdragon 888 and the big screen 2K.

If you have one of these models, we recommend:

• Update the firmware to the latest version (Xiaomi regularly releases patches to optimize the temperature).
• Use a game mode with a restriction FPS (Settings → Special facilities → Game Turbo).
• Avoid simultaneous charging and games (this increases heating by 2-3 times).

For owners. POCO F3 redmi K40 The good news is that after thermopaste is replaced, the temperature drops by 10-15.°C. This can be done by yourself by following the guides to 4PDA YouTube.

8.When to contact the service: signs of critical malfunction

Not all overheating problems can be solved at home, but there are symptoms that require you to bring your phone to the service immediately.

• 🔥 The phone turns off when heated and does not turn on until it cools down.
• 💥 There is a smell of burning or smoke (a sign of a short circuit).
• 📉 Battery swelled (body deformed, screen "steps away" from the frame).
• 🔌 The phone does not hold a charge (discharges in 1-2 hours) and warms up strongly even in standby mode.
• 📡 The antenna stopped catching the network after overheating (could burn the communication module).

What to do in the service:

1. Diagnostics - the wizard will check the battery, motherboard and the thermal interface.
2. Replacement of thermopaste (cost: 1000–2 500) ₽ model-wise).
3. Replacement of the battery (from 1,500) ₽ for Redmi up to 4,000 ₽ for Xiaomi flagships).
4. Mainboard repair/replacement (the most expensive option, from 5,000) ₽).

Average cost of repairs during overheating:

⚠️ Warning: If you are asked to “swipe your phone to fix overheating” on the service, it is a scam. Overheating is almost always a hardware problem, and firmware here will not help (except for viruses, but you can remove them yourself).

💡

When choosing a service, give preference to official Xiaomi partners or trusted workshops with a guarantee. Poor repairs (for example, cheap thermal paste) can exacerbate the problem.

FAQ: Frequent questions about Xiaomi overheating