Your Sonos Ace headphones won't connect to your phone. They show up in Bluetooth but pairing fails, the app can't find them, or they just sit there blinking at you. This is fixable in almost every case without needing to contact Sonos support.
First, check the obvious thing. On your phone, make sure Bluetooth is actually on from Control Center or the quick settings panel, not just sitting grayed out in the background. An accidental tap turns it off on both iOS and Android, and it's the number one reason headphones won't pair.
The Sonos Ace uses a specific reset method that's different from most wireless headphones. You can't just hold a button for 15 seconds and call it done. The Sonos official reset requires a USB-C cable plugged into power while you hold the Power/Bluetooth button. This is worth memorizing because the standard button sequences you know from other headphones won't work here.
Charge the Headphones First
The Sonos Ace needs enough battery to maintain a stable Bluetooth connection during pairing. Plug the USB-C cable into the headphones and a 5W or higher power source for at least 10 minutes before trying anything else.
The headphones take about 3 hours to fully charge from empty with a standard 5W charger. A quick 10-minute charge gives you enough juice to test pairing, so don't wait for a full charge unless you suspect the battery is completely drained. While they're charging, the status light behaves differently depending on the charge state. Normal behavior is a steady white light while charging and a solid white when full.
Reset the Sonos Ace Using the Power/Bluetooth Button
Here's the Sonos official reset method. Take the USB-C cable and plug it into the headphones, then plug the other end into any powered USB port or charger. While the cable is connected, press and hold the Power/Bluetooth button. Keep holding it until the status light on the headphones flashes white and amber. That confirms the reset worked.
Release the button at that point. The headphones will now be in pairing mode, ready to connect to your phone. If the light doesn't flash white and amber, try again with a different USB-C cable. Some third-party cables don't carry the signal needed for this reset to trigger.
Forget the Device, Then Re-Pair
If your phone still shows the Sonos Ace in Bluetooth settings but won't connect, the saved pairing record is corrupted. Go to your phone's Bluetooth settings, find the Sonos Ace in the list, and select Forget This Device or Unpair. Confirm it.
Now reset the headphones using the USB-C method above. Once they're back in pairing mode, they should show up as available on your phone. Tap to connect and you should be back in business within 30 seconds.
Check the Sonos App Version
The Sonos app has been going through changes since the 2024 redesign, and some versions have had setup and connectivity issues. If you're trying to set up the Ace through the app and it can't find them, the app itself might be the problem.
Check that you're running the latest version of the Sonos app from the App Store or Google Play Store. The Ace requires the Sonos app for initial setup and configuration, including TV Audio Swap mode and firmware updates. If the app is outdated, it may not recognize the headphones at all.
For iOS users, the Sonos app requires iOS 17 or later for full features. If you're running iOS 16, the app runs in an unsupported mode and configuration features are disabled. Android users need at least Android 10.
TV Audio Swap Requires a Compatible Soundbar
If your main reason for buying the Sonos Ace is the TV Audio Swap feature, double-check your setup. This feature only works with the Sonos Arc, Beam Gen 2, or Ray soundbar. If you have a different Sonos soundbar, the TV Swap feature won't activate and the headphones won't connect directly to your TV.
The Sonos Ace doesn't have a standalone Bluetooth connection to your TV. It connects through the soundbar using the Sonos app. If the app can't find your soundbar or the headphones, check that both devices are on the same Wi-Fi network and that the soundbar is fully updated.
Switch Between Bluetooth and TV Swap Mode
The Sonos Ace can operate in two modes: standard Bluetooth mode for your phone and TV Swap mode for passthrough audio. If you're stuck in one mode and can't connect to the other, the Sonos app is where you switch.
Open the Sonos app, select your Ace from the device list, and check the mode setting. If it's in TV Swap mode, your phone won't connect to it via normal Bluetooth because it's waiting for the soundbar signal. Switch it to Bluetooth mode and try pairing again.
This catches a lot of people. They think their headphones are broken when really they're just in the wrong mode.
Update the Firmware on the Sonos Ace
Sonos releases firmware updates through the app, and the headphones need to be connected and charging to install them. Open the Sonos app, go to Settings, and check for system updates. If there's an update available for the Ace, install it.
Some important firmware updates have addressed Bluetooth stability and the USB-C audio mode. The USB-C audio mode in particular requires firmware version 1.2 or later to work. If you're trying to use the included USB-C cable for lossless audio and it's not working, check your firmware version first.
Clear Bluetooth Cache on Android
Android phones sometimes hold onto corrupted Bluetooth data that prevents new connections. The fix is to clear the Bluetooth app cache. Open Settings > Apps > Show all apps > tap the three dots and Show system > find Bluetooth > Storage & cache > Clear cache. Don't clear storage unless you want to delete all saved Bluetooth pairings.
After clearing the cache, restart your phone and try pairing the Sonos Ace again. This resolves most Android-specific Bluetooth issues without a full phone reset.
Restart Your Phone
Before going any deeper, just restart your phone. This clears out any temporary Bluetooth glitches and resets the Bluetooth stack on both iOS and Android. It takes 30 seconds and saves you from doing anything more dramatic.
On an iPhone with Face ID, press and hold the Side button and either Volume button until the power off slider appears. On Android, press and hold the Power button and select Restart. Once the phone comes back up, try pairing the Ace again.
Try Pairing Without the Sonos App
If the Sonos app is causing issues, and it often does after a major redesign, pair the headphones directly through your phone's Bluetooth settings. Put the Sonos Ace in pairing mode by holding the Power/Bluetooth button until the status light flashes white. Then open your phone's Bluetooth settings and select Sonos Ace from the available devices list.
You lose the TV Audio Swap and configuration features this way, but you gain a stable Bluetooth audio connection. You can always set up the app features later once the connection is working.
Reset Network Settings as a Last Resort
If you've tried everything and the Sonos Ace still won't connect, resetting your phone's network settings can clear deeper Bluetooth corruption. On iPhone, go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. On Android, the path varies by manufacturer but is usually in Settings > General Management > Reset > Reset network settings.
This wipes saved Wi-Fi passwords and all Bluetooth pairings, so you'll need to reconnect to Wi-Fi and pair everything again. But it clears the most stubborn Bluetooth corruption that nothing else can touch.
