Sonos Error 701 — What It Means & How to Fix It

What Does This Error Mean?

Error 701 means a Sonos software update failed to download or install correctly. This is usually a temporary network issue rather than a hardware fault. Restarting your speaker and retrying the update typically resolves it within minutes.

Affected Models

Sonos Era 100
Sonos Era 300
Sonos One SL
Sonos Move 2
Sonos Beam (Gen 2)

Common Causes

Wi-Fi connection dropped mid-download, leaving the update file incomplete
Sonos update servers temporarily unavailable during a scheduled update window
Insufficient storage on the speaker to stage the new firmware before installation
Router or firewall blocking outbound connections to Sonos update servers
The speaker was power-cycled or moved during an active update process

How to Fix It

Open the Sonos app and check whether any other rooms or speakers are also showing an update error.

A system-wide update failure affecting all speakers usually points to a Sonos server outage rather than a local problem.
Power-cycle the speaker showing Error 701 — unplug it for 10 seconds, then plug it back in.

A power cycle clears any stalled update process and forces the speaker to restart the update attempt cleanly.
In the Sonos app, go to Settings > System > System Updates and tap Check for Updates.

Manually triggering the update check restarts the download from scratch, discarding any corrupted partial download.
Move the speaker closer to your Wi-Fi router to ensure a strong, stable connection during the update.

Sonos updates can be 50–200 MB in size — a weak signal that drops mid-download is a very common cause of Error 701.
Temporarily disable any VPN running on your router or network during the update attempt.

Some VPN configurations intercept or block connections to Sonos update servers, causing the download to fail silently.
If the update still fails, factory reset the speaker using the button on the unit and set it up again, then retry the update.

A factory reset clears any corrupted firmware state — use this as a last resort as it removes the speaker from your Sonos system.

When to Call a Professional

Sonos Error 701 almost never requires professional support — it is almost always a network or timing issue. If multiple speakers all show Error 701 simultaneously across multiple update attempts, contact Sonos Support at support.sonos.com. Make sure your Sonos app and all speakers are on the same software version — mixed versions can sometimes cause persistent update failures.

Frequently Asked Questions

Is it safe to leave my Sonos speaker running while it shows Error 701?

Yes — Error 701 only means the update failed; the speaker continues to work normally. You can keep listening to music while you troubleshoot the update issue. Failing updates are automatically retried by the Sonos app — you may not need to do anything.

Will my Sonos speakers stop working if they are not updated?

Sonos speakers continue to function on older firmware for an extended period. However, some music services and new Sonos app features require matching firmware versions. It is worth resolving Error 701 promptly to keep your system fully compatible.

Can I update Sonos speakers on a mobile data connection instead of Wi-Fi?

Sonos updates require the speaker to be on the same local Wi-Fi network as the Sonos app — mobile data alone will not work. However, ensuring your phone is on Wi-Fi while the speaker connects to the same network will allow the update to proceed. A stable home Wi-Fi connection is always the best environment for Sonos updates.