How to open the thermometer Xiaomi: disassembly without the risk of breakdown

Xiaomi thermometers are some of the most popular smart gadgets for health, but even they sometimes require disassembly. The reasons can be different: replacing a dead battery, cleaning contacts or even repairing after a fall. But the design of these devices often raises questions about how to open the case without breaking the latches or damaging the electronic filling?

In this article, you will find detailed instructions for different Xiaomi thermometer models (including Mi Smart Thermometer, Mijia Bluetooth Thermometer and Smartmi Evaporative Humidifier Thermometer), as well as useful tips on how to avoid typical errors.

Important: Disassembly can lead to loss of warranty if the device is still in warranty service.

What Xiaomi Thermometers Can Be Disassembled By Yourself

Not all Xiaomi thermometers are disassemblable at home, and here are the models that users use most often:

• 🔹 Xiaomi Mi Smart Thermometer 2 – a classic model with a removable back cover.
• 🔹 Mijia Bluetooth Thermometer E Ink – has a glued body, but deals with caution.
• 🔹 Smartmi Evaporative Humidifier Thermometer (combined device) + hygrometer, requires accuracy.
• 🔹 Xiaomi Mi Bunny Thermometer - children's version with a simplified design.

Models with a sealed body (such as some versions for swimming pools or street sensors) are almost impossible to disassemble without damage - their body is glued or sealed with ultrasound. If your model is not included in the list above, check it for screws or latches on the back side.

Preparation for disassembly: tools and security measures

Before you start, prepare everything you need. Without the right tools, you risk scratching the case or damaging the board.

• 🔧 Plastic mediator (or guitar) - to separate the latches.
• 🔧 Cross screwdriver (usually) PH0 or PH00).
• 🔧 Tweezers – to extract small details.
• 🔧 Hair dryer (if the body is glued) - for heating glue.
• 🔧 Isopropyl alcohol - for cleaning contacts.

⚠️ Warning: Do not use metal screwdrivers or knives to open! they leave scratches and can close contacts on the board.

Also, prepare a clean, light-free workplace. It is advisable to use an antistatic mat if you plan to touch electronic components. If the thermometer is connected to the Mi Home app, disconnect it from Bluetooth before disassembling to avoid crashes.

How to open the thermometer Xiaomi Mi Smart Thermometer 2

This is one of the most common models, and it doesn't require any special skills to disassemble.

1. Turn the thermometer downwards, and on the back cover you'll see two screws (sometimes hidden under the sticker).
2. Carefully remove the sticker (if any) with a hair dryer (heat 10-15 seconds) or isopropyl alcohol.
3. Spin the screws with a cross screwdriver. Don't put too much effort into it, because the threads can be fragile.
4. Put a plastic mediator in the gap between the front and back of the body, and carefully swipe it around the perimeter, snapping the mounts.
5. When all the latches open, remove the back cover, and inside you'll see a battery (usually a CR2032) and a board with sensors.

If the lid doesn't lend itself, don't pull it by force -- you've probably missed one of the latches. Check the top and bottom of the hull again.

Features of disassembling Mijia Bluetooth Thermometer with E-Ink display

This model is more difficult to disassemble because of the glued body, and you need patience and accuracy.

Algorithm of action:

1. Heat the body with a hair dryer (temperature 60–70°C) for 1-2 minutes to soften the glue.
2. Insert a plastic mediator into the slot at the display and slowly lead along the seam. The glue should start to lag behind.
3. If the case fails, repeat the heat again. Do not use metal tools!
4. Once opened, you'll see the battery (in some versions) and the board with the E-Ink display. Be careful - the display is fragile!

⚠️ Warning: When disassembling this model, there is a high risk of damage to the E-Ink screen. If you are not sure about your skills, you should contact the service center.

If you need to replace a battery, pay attention to the type of battery that is used in this model, often using the CR2450 (rather than the CR2032 as in other thermometers).

What to do after disassembly: battery replacement and assembly

When the case is open, you can start to do basic manipulations, most often users change the battery or clean the contacts.

After completion of the work, collect the thermometer in reverse sequence:

1. Make sure all contacts are in place.
2. Carefully combine the latches of the body.
3. Turn the screws (do not pull!).
4. Then put the back on the back (if you have).

1. correct battery installation (polarity!).

2. The density of the contacts.

3. Presence of damage on the board (darkness, charred tracks).-->

Common Mistakes and How to Avoid Them

Even with careful disassembly, users often make mistakes that lead to breakdowns.

• 🔸 Use of metal tools → scratching.
• 🔸 Excessive force when opening latches → break down.
• 🔸 Forget to turn off Bluetooth → failures after assembly.
• 🔸 Improper polarity of the battery → plug-in.
• 🔸 Loss of screws or springs → leakproof-body.

If you break the latch, you can temporarily lock it with superglue (but it will break the tightness), and ideally, you can order a replacement case on AliExpress or at a service center.

💡

The most common cause of breakdown after disassembly is damage to the flexible plume (in models with E-Ink display). Always keep the edge charge, do not pull the wires!

When the Disassembly is Inappropriate: Alternative Solutions

Sometimes it's pointless to disassemble a Xiaomi thermometer.

• 💡 If the problem is a software failure (incorrect readings, synchronization errors), try resetting the settings via Mi Home.
• 💡 If the body is sealed (for example, in street sensors), disassembly will lead to moisture ingress.
• 💡 If the thermometer is guaranteed, it is better to contact the service center.

In some cases, it is easier to buy a new thermometer - their price often does not exceed 1000-1500 rubles. For example, Xiaomi Mi Smart Thermometer 2 is cheaper than repairing in the service.

If you still want to try to fix the device, but are afraid to damage it, consider buying a used thermometer for training on Avito or Yula.

FAQ: Frequent questions about the disassembly of Xiaomi thermometers