Google Works to Resolve Chromecast Outage Affecting Older Devices

An expired certificate has rendered second-generation Chromecast and Chromecast Audio devices unusable, with a fix potentially weeks away.

Second-generation Chromecast and Chromecast Audio devices stopped functioning on March 9, 2025, due to an expired device authentication certificate.
Google has apologized to users via email and confirmed that engineers are working on a fix, though no timeline has been provided.
Users are advised not to perform a factory reset on their devices, as this will render them completely inoperable.
Experts suggest the fix could take weeks or even over a month, as it may require either app updates or replacing device certificates, a complex process.
The issue highlights potential future problems, with certificates for other Google devices like Chromecast Ultra and Google Home set to expire in the coming years.