Overheating Xiaomi Redmi Note 8T: How to cool your phone quickly and prevent a breakdown

Xiaomi Redmi Note 8T — One of the most popular smartphones in the budget segment, but even it is not immune to the problem of overheating.°C for simple tasks or even turns off with a warning The temperature is too high, this is a signal of a problem. 8T It relies only on passive heat sinks, making it vulnerable to long-term stresses.

In this article, we will discuss 12 Proven ways to cool the phone - from basic (removing the case, closing background applications) to technical (replacing the thermal paste, firmware core). 665 In the early batches, and how to eliminate them without going to the service center. MIUI 12–14 and relevant to firmware Global/EEA.

Why is Xiaomi Redmi Note warm? 8T: 5 main reasons for the causes

Overheating is not always a sign of a breakdown, for example, during charging, the temperature of the body can rise to 40-42.°C, which is considered the norm for lithium-ion batteries, but if the phone heats up in standby mode or on easy tasks (watching videos, messengers), this is cause for concern.

Here are the key reasons for the Redmi Note 8T:

• 🔥 Thermointerface defect: In the factory, a low-quality thermopaste is applied between the processor and the heat pipe, which dries after 1-2 years, which leads to a deterioration in the heat sink by 30-40%.
• 🎮 Game loads: The Snapdragon 665 chipset is not designed for modern games (Genshin Impact, Call of Duty Mobile) at high settings. core temperatures can reach 70-80°C.
• 🔋 Faulty battery: After 300-400 charging cycles, battery capacity drops and internal resistance rises – this causes heating even at 20% charge.
• 📱 Background processes MIUI: System services (miui.analytics, com.xiaomi.market) can load the processor by 20-30% for no apparent reason.
• 🌡️ External factors: Direct sunlight, ambient temperature above 30°C, use of silicone or leather covers.

⚠️ Note: If the phone is heated unevenly (for example, only in the upper part or near the camera), this may indicate detachment of the graphics chip or short circuit in the power module.

How to quickly cool the Redmi Note 8T undisassembled: 5 express methods

If your phone is already hot and you can’t turn it off (for example, wait for an important call), use these methods:

1. Remove the case and place the phone on a metal or ceramic surface (for example, on the back of a laptop). Metal will take away heat 2-3 times more efficiently than wood or plastic.
2. Activate the plane mode for 5-10 minutes. 4G, Wi-Fi, Bluetooth and GPS, That loads the processor even in the background. → SIM-maps and mobile networks → Flight mode.
3. Lower the screen brightness to 30-40% and turn off autobrightness.Redmi Note Display 8T (IPS, 6.3) consumes up to 1.5 W of energy at maximum brightness.
4. Close all apps through the multitasking menu (swipe up late). Especially critical ones: Facebook, Instagram, TikTok — they continue to work in the background.
5. Use a cooling pack (such as Baseus Ice Silk or Xiaomi Cooling Pad) and attach it to the back for 10-15 minutes, the temperature drops by 5-10.°C.

If the temperature is over 50°C, and the phone started to brake or spontaneously reboot, immediately turn it off and let it cool for 30 minutes.

Settings MIUI To reduce heat: step-by-step instructions

MIUI It offers a few hidden features that help control the temperature, most of which are available without root rights, but require activation in the developer menu.

First, turn on the developer mode:

1. Go to Settings. → The phone.
2. Tap 7 times on the MIUI version.
3. Enter your Xiaomi account password if required.

Now activate these parameters:

⚠️ Warning: Do not activate the option Do not turn off the screen in developer mode. This will lead to constant operation of the display and overheating even in simple mode.

For advanced users: If you’re willing to sacrifice performance for temperature, set a CPU clock limit through the Kernel Auditor app (requires root). Lowering the maximum core frequency of the Snapdragon 665 from 2.0 GHz to 1.6 GHz will reduce heating by 10-15 GHz.°C, but will reduce the speed of work by 20-25%.

💡

After the update MIUI phone began to warm up stronger, perform a cache reset through recovery: turn off the device, press the Power + Volume Up, select Wipe Cache Partition.This won't delete your data, but will clear temporary files that may be loading the system.

Software Solutions: Applications for Temperature Control

Specialized utilities help monitor the temperature of components and automatically cool the phone. We tested 5 applications on the Redmi Note. 8T — The best results were shown:

• 📊 CPU Monitor: Shows the temperature of each CPU core in real time, shows peak loads that are not visible in the standard menu MIUI.
• ❄️ Coolify: Automatically closes background processes when a set temperature is exceeded (e.g. 45).°C) Works without root.
• 🔧 AccuBattery: Monitors battery health and shows how charging/discharge affects heating. useful for identifying faulty battery.
• 🛠️ Greenify: Freezes apps that wake up in the background (like Facebook or AliExpress) and requires root for full functionality.

Example of Coolify Setup for Redmi Note 8T:

1. Install the app from Google Play.
2. Launch and grant permissions for Special Access (Settings) → Annexes → Coolify → Special access).
3. In Temperature, set the threshold 42.°C.
4. Turn on the Auto Cool Down option and select Aggressive Mode.

Important: Some apps (such as Xiaomi's Game Booster) can increase heat despite promises of optimization. FPS In games, which has the opposite effect, check the temperature before and after use.

Hardware methods: when without disassembly can not do

If the software doesn't work, the problem lies in the physical condition of the phone. 8T There are three "hardware" causes of overheating:

1. The dried thermopaste between the processor and the heat pipe, and over time, it loses thermal conductivity, and the chip begins to "choke."
2. Pollution of the radiator with dust or fibers (for example, from a cover) This impairs heat transfer.
3. Bloated battery that presses on the motherboard and breaks the contact of the thermal interface.

Removal will require disassembling the phone, and if you're not sure about your skills, you'd better go to the service, but with the tools (plastic blades, suction cups, hair dryers) you can do it yourself.

Step-by-step instructions for replacing thermopaste:

1. Turn off the phone and remove the tray for SIM-map.
2. Heat the back cover around the perimeter with a hair dryer (temperature 70–80)°C) for 2-3 minutes to soften the glue.
3. Tap the lid with a plastic spatula, starting at the bottom corner (near the connector). USB-C).
4. Unscrew 12 screws (type) T3) and carefully remove the metal plate.
5. Remove the old thermopaste from the processor and heat tube using isopropyl alcohol (90%+).
6. Apply a new paste (recommended Arctic) MX-4 or Thermal Grizzly Kryonaut) in a thin layer (thickness 0.1–0.2 mm).
7. Put your phone back together, check the work.

⚠️ Note: When disassembling Redmi Note 8T It's easy to damage the fingerprint scanner plume (from the power button to the board) and it's attached by fragile connectors -- don't pull the wires!

If the temperature has not dropped after the replacement of the thermopaste, check:

• 🔍 Battery condition: Bloating is visible to the naked eye (the cover may be lifted).
• 🔌 Charging port contacts: Oxidation or pollution increases resistance, leading to heating.
• 📡 Antenna modules: Damaged 4G/LTE-antennas cause the processor to work at the limit at a weak signal.

💡

Replace thermopaste with Redmi Note 8T It only works when you're right about the material. Cheap pastes, for example, KPT-8) They lose their properties after 3-6 months, and the best choice is liquid metal pastes (for example, Thermal Grizzly Conductonaut), but they require careful application to avoid short circuits.

What to do if you have a Redmi Note 8T heats up

Heating during charging is one of the most common complaints of Redmi Note owners 8T. Causes:

• 🔌 Use of a non-original charger (especially with higher power output) 18W).
• 🔋 Quick Charge 3.0 heats up battery to 45°C and above.
• 📱 Using your phone while charging (games, videos, navigation).

Decisions:

1. Turn off fast charging: Settings → Battery → Battery settings → Disable "Fast Charging" This will increase the charging time to 2-2.5 hours, but the temperature will not exceed 35°C.
2. Use the original Xiaomi power supply (model) MDY-08-EQ, 18W). Non-original memory (especially no-name) can produce unstable voltage.
3. Charge your phone when it's off or in airplane mode, and that'll reduce the processor load.
4. Do not use your phone at temperatures below 10.°C. Lithium-ion batteries do not tolerate charging in the cold.

If the phone is heating up and not charging (or charging is jerky), the problem may be:

• 🔌 porte USB-C: Check for debris or oxidation (clean carefully with a toothpick).
• 📉 Firmware: Update MIUI before the latest version or reset to factory settings.

When overheating is a reason to contact the service

Not all problems can be solved by yourself. Contact Xiaomi Service Center if:

• 🌡️ The temperature of the phone is over 55°C in standby mode (check through) CPU Monitor).
• 🔥 The body is heated unevenly (for example, only in one corner).
• 📵 The phone turns off on its own when heated to 40-45°C.
• 🔋 The battery is swollen (seen by the raised back cover or the increased gap between the screen and the frame).
• 📱 Artifacts (strips, flickers) appear on the screen when heated - this is a sign of detachment of the graphics chip.

The cost of repairs in official Xiaomi services (for 2026):

⚠️ In informal services often offer a "cheap" replacement battery (1000-1500) ₽), But they have batteries of questionable quality, and they can swell in 3 to 6 months or not hold a charge!

If the phone is warranty (up to 12 months from the date of purchase), repairs should be free if overheating is caused by a manufacturing defect.

1. Keep a check or a warranty card.
2. Do not open the phone yourself (opening marks will void the warranty).
3. Please contact the official service center with your passport.

FAQ: Frequent questions about the Redmi Note overheating 8T