Some older Chromecasts are suddenly ‘untrusted,’ can’t cast anymore

Updated March 13, 2025: Google has issued an update that fixes the problem with older Chromecast devices.

Updated March 11, 2025: According to one user on Reddit, the alleged reason behind the faulty Chromecast devices can be traced to the expiration of important SSL certificates on March 9th. These SSL certificates are needed to use the streaming devices.

Google perhaps knew these certificates were expiring and let them expire anyway, banking on users not kicking up a fuss when their older models stopped working. Or perhaps it slipped through the cracks and Google simply forgot to update their certificates.

Conveniently, users have posted some helpful tips to get around the issue. Since Google hasn’t yet provided a solution of their own, you might try fixing it yourself (at your own risk).

The original story: Google Chromecast users are apparently struggling with serious connection problems, as reported by 9to5Google. Google announced last year that Chromecast devices would no longer be manufactured or supported, in favor of the newer Google TV sticks. Many of the older streaming adapters are still in use, though.

Unfortunately, some older Chromecasts are virtually unusable right now, as they’re no longer recognized when an attempt is made to connect them. Users receive the error message: "Untrusted device: [name] couldn't be verified. This could be caused by outdated device firmware." Affected devices include the Chromecast (2nd Gen) and Chromecast Audio.

But it’s important to clarify that this isn’t an attempt by Google to quietly block older Chromecast devices. It’s an unexpected bug.

What can you do if you’re affected?

Right now, there isn’t much that affected users can do. But there is one thing you should avoid at all costs: DON’T reset your Chromecast to factory settings while this problem exists. That’ll make the situation even worse, as your device will no longer be able to connect to Wi-Fi.

Google wrote the following on Reddit:

“Hey all,

We’re aware of an emerging issue impacting Chromecast 2nd gen and Chromecast Audio devices and are working on a fix. Do not factory reset your device — we will keep you all updated when the fix rolls out. If you have already factory reset your device, we will provide instructions to set your device back up as soon as possible. Thank you for your patience.”

For now, affected users can only wait for a bug fix from Google. If you have already reset your device to factory settings, you may need to take additional measures to get your device up and running again.