Fix it
Noise-Cancelling Headphones Not Working? Fixes (2026)
Fix common ANC headphone problems: ANC not engaging, Bluetooth dropouts, one side silent, and charging issues.
Most headphone problems are settings or connection issues, not hardware failures. Work through these fixes in order before considering a warranty claim.
ANC will not turn on
Check that ANC is enabled in the companion app or via the headphone's button; some models default to off after firmware updates. Ensure the battery is charged, since ANC disables at very low battery on most models. If the app shows ANC on but you hear no difference, test in a steady-noise environment like near a fan; ANC is subtle in quiet rooms.
Bluetooth keeps disconnecting
Forget the headphone on all previously paired devices, then re-pair with only the device you are using. Move away from Wi-Fi routers and microwaves, which share the 2.4 GHz band. If multipoint is enabled, try disabling it temporarily; some dropouts come from the second device competing for the connection.
One earcup has no sound
Check the balance setting in your phone's accessibility options; it is easy to nudge accidentally. Clean the earcup contacts if the model has detachable cables. For true wireless-style issues on over-ears, a factory reset (hold power and ANC buttons per the manual) resolves most single-side dropouts.
Headphone will not charge
Try a different USB-C cable and a wall charger rather than a laptop port; some headphones are picky about low-power sources. Inspect the port for lint with a wooden toothpick. If the LED shows nothing at all after an hour, the battery may be deeply discharged; leave it plugged in overnight before concluding it is dead.
Questions, answered
Why does ANC sound worse after a firmware update?
Occasionally updates retune ANC behavior. Check the app for an ANC level or optimizer setting that may have reset, and re-run any calibration routine the app offers.
When should I use the warranty instead?
If factory resets, different cables, and re-pairing all fail, or if there is physical damage like a cracked headband or dead driver, contact the manufacturer. Most flagships carry at least a one-year warranty.