Xiaomi’s “L” Error: What Does It Mean and How to Fix the Fault

You’ve stood on Xiaomi’s smart scales, expecting to see the usual weight numbers, but instead the mysterious letter “L” flashed on the screen. What does it mean? a failure, software failure or user error? In this article, we’ll look at all the possible causes of the L symbol on the Mi Body Composition Scale, Smart Scale 2 and other models of the brand, as well as give step-by-step instructions for fixing the problem – from simple reboot to deep calibration of sensors.

It's important to understand that the L is not a random artifact, but an error code that signals problems with load measurement. Unlike errors like "Err" or "Lo" (battery discharge), the L symbol is most often associated with strain gauges or excess load, but there are other nuances that many users don't know.

Before you take the scales to the service center or write them off, try going through our diagnostic checklist. 80 percent of the time, the problem is solved by yourself in 5 to 10 minutes. And if you own a model with bioimpedance (body composition analysis), then the L error can mask more serious malfunctions, which we will also discuss below.

What the letter “L” means on Xiaomi scales: decoding the error

The L symbol on Xiaomi’s smart scale display is not just a random signal, but part of the device’s diagnostic system, which the official brand documentation interprets as:

• 🔍 Low Load is a load below the minimum threshold (less than 5 kg) and a scale cannot measure weight correctly if you stand on it too easily (such as a child or pet).
• ⚖️ Load Error -- a strain gauge malfunction, which can be caused by mechanical damage, contamination of contacts, or software failure.
• ⚡ Overload Protection is the excess of the maximum load (usually 150-180 kg for most Xiaomi models), in which case the scales block the measurement to avoid damaging the sensors.

Interestingly, in some firmware (for example, for Mi Body Composition Scale 2), the letter L can appear when the letter is not calibrated correctly after transport or fall.

Also, the L error sometimes occurs when you conflict with the Mi Fit app. If the scale is connected to the smartphone via Bluetooth, but the data synchronization is error-prone, the device can give false signals about the malfunction, especially after updating the firmware of the scale or application.

The main causes of the “L” error and how to diagnose them

To effectively fix the problem, we first need to identify the source of the problem, and we've collected all the possible causes of the letter L on Xiaomi scales and arranged them by frequency, from the simplest to the most complex.

Special attention should be paid to mechanical damage. If the scales fell from a height, were hit or put heavy objects (eg weights), could damage the load gauges. In this case, the symbol L will appear even under the correct load. Check this is simple: carefully press each corner of the scales with your hand — if you hear foreign sounds (screaks, cods), this is a sign of breakdown.

⚠️ Warning: If Xiaomi scales show L after replacing batteries, don't be quick to blame the batteries. Often the problem lies in the oxidized contacts of the battery compartment. Wipe them with a cotton swab dipped in alcohol and try again.

Step-by-step: how to remove the error “L” on the scales Xiaomi

Now, let's get to the practice. Below is the universal L error fixing algorithm that is suitable for most Xiaomi weight models (Mi Body Composition Scale 2, Smart Scale 2, Mi Scale, etc.) Follow the instructions in order until the problem disappears.

Make sure that the load is within 5-150 kg|

Replace batteries with new ones (even if the old ones “seem to work”)|

Wipe the contacts of the legs of the scales with alcohol |

Reset settings (click the power button for 10 seconds)|

Update the firmware through the application Mi Fit-->

Step 1. Load check

Stand on the scales with bare feet (socks or slippers can distort readings) and make sure that your weight is in the range of 5-150 kg. If you weigh less than 5 kg (for example, a child), take an additional load. If more than 150 kg, try weighing on other scales for check.

Step 2: Replace batteries

Even if the battery light doesn't flash, replace the batteries with new ones. Use the AAA batteries of well-known brands (Duracell, Energizer). After replacing, wait 30 seconds for the scales to initialize the new batteries.

Note: In bioimpedance models (e.g. Mi Body Composition Scale 2), discharged batteries can cause false sensor errors.

Step 3: Resetting settings

If replacing batteries doesn’t work, do a hard reset:

1. Remove the batteries from the scales.
2. Press and hold the on button (or touchpad) for 15 seconds.
3. Put the batteries back in and turn the scales on.

After reset, you may need to reconnect to the Mi Fit application.

Step 4: Calibration of sensors

For models with bioimpedance function (Mi Body Composition Scale 2), perform manual calibration:

1. Stand on the scale and hold the weight for 10 seconds.
2. Get off the scale and wait 5 seconds.
3. Repeat the weighting 2-3 times in a row.

This procedure helps sensors to “learn” your weight.

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If Xiaomi scales after reset show the wrong weight (for example, 0 kg or inflated values), repeat the calibration 3-5 times.

What to do if the “L” error appears after the firmware update

One common cause of failure is an incorrect firmware update through the Mi Fit app, which can occur if:

• 📱 The update was interrupted due to loss of Bluetooth connectivity.
• 🔄 Installed beta version of firmware with bugs.
• 📵 The scales were turned off during the update.

In this case, the L symbol can be accompanied by other artifacts: a flashing screen, incorrect weight readings or a complete lack of response to pressing, solving the problem by rolling back the firmware or forced flashing.

Instructions for restoring firmware:

1. Remove the scales from the Mi Fit app (Profile → Devices → Delete).
2. Reset the scales (see Step 3 in the previous section).
3. Connect the scales again through Mi Fit and wait for the offer to update the firmware.
4. Make sure the scales are not discharged (the battery charge should be enough for 10-15 minutes of continuous operation).

If automatic updates don’t help, try the manual firmware via Mi Home (power users only).

1. Download the latest firmware version for your model from the official Xiaomi website.


2 Rename the file to "scale_fw.bin".




3. Place it in the root folder of the smartphone.




4. In the Mi Home app, select scales → Three dots → Manual update.

⚠️ Warning: Don't interrupt the firmware process! If Xiaomi scales show L after a failed upgrade and don't respond to a reset, contact a service center - self-repair can lead to complete loss of functionality.

Mechanical breakdowns: when you can not do without repairs

If all software methods have been tried, but the scale still shows L, the problem is probably hardware.

• 🔧 The symbol L appears even when empty scales (no load).
• 💧 The legs or body show signs of corrosion or moisture.
• 🔊 When you press the angles of the scales, you hear extraneous sounds (crunch, creak).
• 🔌 The scales are not switched on or off immediately after L appears.

The most vulnerable elements in Xiaomi’s weights are:

1. Tenzos are responsible for measuring weight, and when you fall or hit, your contacts can crack or move away.
2. Control fee - if it gets moisture, short circuits are possible.
3. Battery compartment contacts – oxidation leads to unstable power supply and failures.

The cost of repairs in Xiaomi service centers varies from 1,500 to 4000 rubles depending on the breakdown.

• Replacement of strain gauges - ~ 2,500 rubles.
• Cleaning of the board from corrosion - ~ 1,800 rubles.
• Replacement of the battery compartment - ~1 200 rubles.

If the scales are warranty, do not try to disassemble them yourself - this will void the warranty obligations. Contact the official Xiaomi service center with a check and a box.

How to avoid the “L” error in the future

To ensure that Xiaomi scales last a long time and do not give out errors, follow these recommendations:

• 🧼 Regular cleaning: Rub the legs of the scales and the glass surface with a soft cloth soaked in soapy solution. Avoid abrasives!
• 🔋 Batteries: Use only alkaline batteries AAA. Change them every 6 to 12 months, even if the scales are working.
• 🚫 Moisture protection: Do not place the scales in the bathroom or near the sink. If water hits, wipe the device immediately and dry for 24 hours.
• 📱 Updates: Check firmware updates in Mi Fit regularly, but don’t install beta versions.
• 🏋️ Load: Do not exceed the maximum weight (as indicated in the instructions) and do not drop heavy objects on the scale.

If you are using a bioimpedance scale (Mi Body Composition Scale 2), remember:

• Weigh yourself at the same time (better in the morning on an empty stomach).
• Do not weigh yourself after intense training or sauna – this will distort the readings.
• Bare feet should be dry and clean (sweat or cream may interfere with contact with electrodes).

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Xiaomi bioimpedance scales require careful handling: do not put them on a cold floor (for example, in the bathroom in winter), as this can cause condensation inside the case and corrosion of sensors.

Frequent questions about the “L” error on Xiaomi scales