Performing a factory reset on your Sonos device returns the unit to the state it was in when you first purchased it. How to perform a factory reset varies by device. This process removes all of your saved settings and data, so proceed with caution, make note of current settings and back up any important data.
A factory reset is not recommended by Sonos as a troubleshooting step but should only be necessary if the player needs to be registered under a new user.
Reset the Sonos Playbar, Boost and Bridge
Unplug the power cable on the back of the Sonos Playbar, Boost or Bridge unit.
Wait two to three minutes and then -- with the other hand free to reconnect the power cord -- press and hold down the Mute button on the Playbar's remote -- or the Connect button if you're using a Boost or Bridge.
Older Playbar models may have a Play/Pause button rather than a Mute button.
Continuing to hold down the Mute (or Connect) button, reconnect the power cable.
Release the Mute button on the Playbar's remote when the Status Indicator light on the right side of the Playbar unit switches from flashing white to solid amber.
Release the Connect button on the Boost or Bridge unit's remote when the Status Indicator light starts flashing amber.
Wait for the green and white Playbar lights to flash in unison. Wait for the Boost or Bridge Status Indicator light to flash green. In both instances, your device has been successfully returned to its factory settings when these lighting changes occur.
Reset Your Controller
Handheld Sonos CONTROL
Choose Settings on the main menu.
Select Controller Settings.
Choose Advanced Settings.
Select Factory Reset, which is located in the Music section.
Sonos Desktop Controller for PC and Mac
Click Help on the main menu of the Desktop Controller program.
Select Reset Controller to return the controller to its factory settings.
Sonos Controller for Android and iOS Devices
Close the Sonos app on your Android or iOS device, if it's currently open.
Open the Settings menu.
Select Reset Controller to return the device to its factory settings.
Relaunch the Sonos app on your mobile device to reestablish its connection with the controller.
After resetting a Sonos controller, you may be prompted to register your system again before you can connect to a music service.