The short answer
One silent earbud is usually a broken pairing state, not a broken earbud. Put both buds in the case, close the lid for 15 seconds, forget the device in your phone’s Bluetooth settings, then reset the buds with the case button and pair again. Clean the metal charging contacts with a dry cotton bud first — a dirty contact means one bud never charged.
When one earbud goes silent, the instinct is to assume it has died. It very rarely has. True-wireless earbuds work by having one bud connect to your phone and relay to the other, or by both connecting independently — and either arrangement can fall out of step. The result sounds like hardware failure and is almost always a software or contact problem.
Check these three things before anything else
1. Is the silent bud actually charged?
This is the single most common cause, and it is sneaky, because the case can look like it is charging both when it is only charging one. Lint, earwax or corrosion on the metal contacts — either on the bud or in the case well — breaks the circuit. Take both buds out and look at the two small metal pads on each bud and the matching pins in the case. If one set looks dull, dark or has a grey film, that is your problem.
Clean them with a dry cotton bud, or a cotton bud barely dampened with isopropyl alcohol, and let it dry fully. Do not use water and do not scrape with anything metal.
2. Is the audio balance slider off centre?
Worth ten seconds because it perfectly mimics a dead earbud. If someone has dragged the left-right balance control to one side, one ear goes silent on every app and every pair of headphones.
- iPhone: Settings, Accessibility, Audio and Visual, and check the Balance slider is centred.
- Android: Settings, Accessibility, then look for Audio balance or Sound balance.
- Windows: right-click the speaker icon, Sound settings, choose the device, Properties, and check the left and right levels match.
3. Does the problem follow the bud or the ear?
Swap the buds between ears. If the silence moves with the bud, the fault is that bud. If the silence stays in the same ear, the fault is the balance setting or your hearing — and in that order.
The reset that fixes most cases
Clean the contacts and charge both buds
Wipe the metal pads on both buds and the pins inside the case. Put both buds in, close the lid, and leave it on charge for 20 minutes. Then check that the case shows both buds charging — most cases show an LED per bud, or report per-bud levels in the companion app.
Reset the connection with the case
Put both buds in the case and close the lid for 15 seconds. This is not the same as a reset, but it forces both buds to re-establish their link to each other. On many models this alone brings the silent bud back.
Forget the earbuds on your phone
Open Bluetooth settings, find the earbuds, and choose Forget or Unpair. This matters: pairing again without forgetting first reuses the same broken profile. On iPhone tap the small i next to the name, then Forget This Device.
Factory reset the earbuds
With both buds in the open case, press and hold the button on the case for roughly 15 seconds until the light flashes white or amber, depending on the model. AirPods use the same method: open case, hold the setup button on the back until the light flashes amber then white. Check your model’s manual, because the hold time varies from 5 to 30 seconds.
Pair from scratch
Open the case near the phone and pair as if they were new. Test both buds immediately with a track you know has sound in both channels — some music is genuinely mixed heavily to one side, which has fooled plenty of people.
Check for firmware updates
If the brand has a companion app, open it and look for a firmware update. Single-bud dropouts are a common bug and a common fix. The buds usually need to be in the case and charging for the update to install.
Pair the earbuds to a different phone, tablet or laptop. If both buds work there, the fault is the pairing profile on your original device, not the earbuds — and deleting and recreating that profile will fix it.
If one bud is genuinely dead
After a clean, a reset and a fresh pairing, if one bud still shows no charge and never appears, it has failed. Two things worth knowing before you buy a whole new set:
- Most brands sell single replacement buds. Apple, Samsung, Sony, Jabra and Bose all do, and a single bud is far cheaper than a pair. You usually order it through support rather than the shop front.
- Check the warranty date first. Earbud failures cluster in the first year and are normally covered. A failed bud that never charges is a straightforward warranty claim.
The common physical cause of a genuinely dead bud is moisture — sweat during exercise is the usual culprit, and it corrodes the charging contacts from the inside where cleaning cannot reach. If you train in them, drying them before they go back in the case measurably extends their life.
Frequently asked questions
Most often the other one has not charged, because of a dirty contact in the case, or the pairing state has broken. Clean the contacts, charge both, forget the device on your iPhone, then reset with the button on the back of the case until the light flashes amber and white.Why does only one AirPod work?
On nearly all modern models, yes — each bud can connect independently, which is useful for calls or for cycling. If only one bud will ever connect and the other refuses even alone, that points at the bud rather than the pairing.Can I use just one earbud on its own?
Intermittent cutting is usually interference or distance rather than a fault. Your body blocks 2.4 GHz well, so a phone in a back pocket on the opposite side to the struggling bud produces exactly this. Move the phone to the front and see whether it settles.Why does one earbud keep cutting out instead of going fully silent?
It clears the paired devices list and any custom settings such as equaliser profiles or touch control assignments. Your music and accounts are untouched. You will need to pair again with every device you used them with.Does resetting earbuds delete anything?
Clean the contacts, charge both, forget and re-pair. That sequence resolves the large majority of single-earbud failures without spending anything.
