One headphone Xiaomi Redmi Airdots does not work: causes and step-by-step solution of the problem

Did you pull out of the Xiaomi Redmi Airdots case, turn on your favorite playlist, but the sound comes from only one headphone? Or the second headphone is not determined by the phone at all? This problem is familiar to many owners of Xiaomi wireless headphones - from budget Redmi Airdots to more expensive AirDots Pro. The reasons can be both software (sync failure, outdated firmware) and hardware (contact damage, battery discharge).

In 80% of cases, the malfunction can be repaired without going to the service center, and in this article we will discuss all the possible reasons why one Redmi Airdots earphone stopped working, and give step-by-step instructions for diagnosis and repair, and you will learn when to carry the headphones to the service, and when the problem lies in the smartphone or Bluetooth settings.

Before you start repairing, check the obvious: whether the headphones are charged (the indicator on the case should burn white or green), whether the speakers are contaminated, whether the mono-sound mode is turned on in the phone settings. If everything is fine, read on.

1.Why one earphone stopped working: the main reasons

The problem with a single Xiaomi Redmi Airdots headphone rarely comes on suddenly, usually preceded by characteristic “symptoms.”

• 🔋 The battery is dead, the headphone doesn't turn on, the indicator doesn't burn, the case doesn't charge, and it often happens if you don't use headphones for a long time or store them outside the case.
• 📱 Sync failure: the earphone plugs in, but only one is sounded, the other is defined as a separate device, typically after updating the firmware of the phone or headphones.
• 🎧 Contact contamination — the sound is interrupted, the earpiece is periodically turned off, visible to the naked eye: oxidation, dust or corrosion on metal contacts in the case or on headphones.
• 🔊 Dynamic damage - sound is present, but distorted (wheezing, crackling) or very quiet, can occur after falling or getting moisture.
• 🔄 Software failure: the earphone plugs in, but it shuts down immediately or it's unstable, often solved by resetting the settings.

According to service centers, 60 percent of the time is due to battery discharge or headphone synchronization failures, the remaining 40 percent is due to hardware malfunctions, from contamination of contacts to failure of the microphone or speaker, and if your case does not fit any of the reasons, check your smartphone settings (perhaps Monosound mode is activated for people with hearing impairments).

⚠️ Warning: If the earphone fell into water or was subjected to heavy mechanical stress (hit, squeeze), do not try to repair it yourself. In this case, the probability of short circuit is high, and any manipulations can lead to a complete failure of the device.

2. Diagnosis of the problem: how to determine the cause

Before you fix it, you need to understand what the problem is. Go through this checklist to narrow down the possible malfunctions:

Check the charge of the case and headphones (the indicator should burn white / green)

Connect the headphones to another device (phone, tablet, PC)

Try using the headphone separately (get only it out of the case)

Examine contacts on headphones and in the case for oxidation or dirt

Check your Bluetooth settings on your phone (are there any restrictions on audio devices)-->

If the earphone is not detected by any device, the problem is most likely in the earphone itself (discharge, damage to contacts). If it connects but there is no sound, check the sound settings on the phone or reset the headphone settings. If there is sound but it is distorted, the speaker or microphone is to blame.

Pay special attention to the indicators on the case and headphones:

• 🔴 Red flashing – low charge, charging is required.
• 🔵 Blue flashing - headphone in pairing mode.
• ⚪ White permanent – the headphone is charged and ready to go.
• 🟢 Green on the case – headphones are fully charged.

If the indicator on the broken headphone does not burn at all, this is a sign of complete discharge or damage to the battery. In this case, try charging the earphone separately (for example, bringing contacts to the charger for the phone using tweezers).

Redmi Airdots (First Generation)

Redmi Airdots S

Redmi Airdots 2/2S

Redmi Airdots 3/3 Pro

Another model-->

3. Software solutions (without disassembly)

If the problem isn't mechanical damage, start with software that doesn't need disassembly and helps bring the earbud back to life in 70 percent of cases.

Resetting headphone settings

The most effective way to get synchronization out of order is for all Redmi Airdots models:

1. Put both headphones in the case and close the lid.
2. Pull them out and hold the touch buttons on both headphones for 15 to 20 seconds until the lights start flashing red and blue.
3. Return the headphones to the case, then pull them out again – they should automatically sync.
4. Connect them to your phone as a new device through Settings → Bluetooth.

If the reset didn't help, try forced reconnection:

1. Forget the device in your phone's Bluetooth settings.
2. Turn off Bluetooth for 30 seconds, then turn it on again.
3. Remove the headphones from the case and hold the buttons until the blue light flashes (pairing mode).
4. Connect as a new device.

Firmware update

Outdated firmware can cause synchronization problems. Redmi Airdots can be updated through the official Mi Home app (update-enabled models only):

1. Install the Mi Home app from Google Play or the App Store.
2. Put the headphones on the phone.
3. Open Mi Home, find the headphones in the list of devices.
4. If an update is available, follow the instructions on the screen.

⚠️ Warning: Do not interrupt the firmware update process, this can cause the headphones to fail completely. Make sure the case charge is at least 50% and the phone is connected to the network.

Checking the phone settings

Sometimes the problem lies not in the headphones, but in the settings of the smartphone:

• 📵 In the plane mode – turn it off in the notification curtain.
• 🔊 Monosound - check in Settings → Special facilities → Sound (on Android) or Settings → Universal access → Audiovisual content (on iPhone).
• 📱 Bluetooth restrictions – some applications (like Poweramp) can block audio output to wireless devices.

💡

If the headphones are plugged in but only sound in one, try turning on and off Separate Use mode (if supported by the model). To do this, double tap the touch button on the non-functioning earphone.

Hardware methods: cleaning contacts and charging

If the software didn't work, it's time to check the hardware. Start with the simplest thing: cleaning the contacts and checking the charging.

Cleaning headphone and case contacts

Over time, dust, sweat, or oxides accumulate on metal contacts (both on the headphones and inside the case), leading to poor contact and unstable charging.

• 🧴 Cotton sticks (better with a hard tip).
• 💧 Alcohol (isopropyl or medical 70%).
• 🧲 Lastic (to remove persistent oxides).

Step-by-step:

1. Soak the cotton swab in alcohol and gently wipe the contacts on the headphones and inside the case.
2. For persistent contamination, use an eraser - rub the contacts until shine.
3. Allow the headphones to dry for 10-15 minutes before use.
4. Check if the headphones are charging now (the indicator on the case should burn red when charging).

If the headphone is not charging after cleaning, the problem may be damage to the battery or a break in the contact group, in which case only repairs at the service center will help.

Checking the charger

Sometimes the case doesn't charge one of the headphones because of the bad contact.

1. Get both earphones out of the case.
2. Put back only the non-working headphone and close the lid.
3. Look at the charging indicator: 🔴 Blinks red, it's charging. ⚪ No fire, no contact or damaged battery.

If the indicator does not respond, try to slightly press the headphone in the case (possibly, the contacts do not touch).

If the headphone doesn’t charge even when pressed, try an alternative charging method:

⚠️ Warning: Charging the headphone directly from the charger is an emergency method that can damage the battery if it is not performed correctly. Use it only if other methods have not worked, and you are willing to risk it.

5. Disassembly of the headphone: when and how to do it

If all previous methods have failed, the last chance is to disassemble the earphone to check the internal components, which is a risky step, because you can damage the device permanently, but sometimes it only helps to identify the problem.

Redmi Airdots is only worth disassembling in the following cases:

• 🔊 The earphone does not make sound, but connects and charges.
• 🔋 The battery does not hold a charge (discharges in a few minutes).
• 💧 The headphone fell into the water or was subjected to severe humidity.
• 🔧 Mechanical damage to the body is visible.

You will need to disassemble:

• 🔧 Plastic mediator or thin screwdriver.
• 🧲 Tweezers.
• 🔥 Fryer (for softening glue).
• 🧴 Clay. B-7000 or similar (for reassembly purposes).
• If you see a wire break, carefully solder it (you need a soldering iron and experience with microelectronics).
• Collect the body back by gluing the seam with glue B-7000.

⚠️ Note: If you are not sure about your soldering skills or do not have experience with microelectronics, do not try to repair the headphone yourself. Contact the service center - the cost of repairing Redmi Airdots usually does not exceed 1000-1500 rubles, which is cheaper than buying new headphones.

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If you find a bloated battery after disassembly, don't use an earphone! It's dangerous: Lithium-ion batteries can ignite. Dispose of the device and buy a new one.

6. When to contact the service center

Not all breakdowns can be repaired by yourself, but here are the times when you need to carry Redmi Airdots for repair:

• 🔥 Bloated battery - the risk of fire.
• 💧 Liquid ingress - corrosion of the board, short circuit.
• 🔊 Damaged speaker – crackling, wheezing or complete lack of sound after falling.
• 📡 Bluetooth module problems – the headphone is not defined by any device.
• ⚡ Charging board malfunction - the case does not charge the headphones, although it itself charges.

The cost of repairs in official service centers Xiaomi:

Before the service visit:

1. Check the warranty card – if the headphones are warranty, repairs can be free.
2. Do a reset (as described above) – sometimes it saves diagnostic time.
3. Check with the master if there are spare parts for your model.

If the repair costs more than 30% of the cost of new headphones, it makes sense to consider buying a new pair. For example, Redmi Buds 4 or Redmi Airdots 3 Pro cost about 2000-3,000 rubles and offer better sound quality and running time.

7. How to prolong the life of headphones: prevention of breakdowns

To avoid problems with Redmi Airdots in the future, follow these guidelines:

• 🔋 Charge correctly: Don't leave your headphones in a case on charge for more than 24 hours. Use the original cable and power adapter. Avoid overheating (don't charge in direct sunlight).
• 🧼 Keep your contacts clean: Clean with a cotton swab with alcohol 1 time per month. Remove earwax from the speaker mesh with a soft brush.
• 🌧️ Protect from moisture: Do not use headphones in the rain or in the pool (even if they have protection). IPX4). If your headphones get wet, dry them for 24 hours in rice or silica gel before charging.
• 📦 Store correctly: Always put your headphones in your case after use. Avoid storage in pockets with keys or coins (risk of mechanical damage).

It is also useful to update your firmware regularly through the Mi Home app (if your model supports updates), which fixes bugs and improves connection stability.

💡

If you lose your headphones often, turn on the “Device Search” feature in the Mi Home app, which will show the last connection on the map (only works for models with Mi Band or Xiaomi Wear support).

FAQ: Frequent questions about Redmi Airdots