Regarding an issue with Chromecast 2nd gen and Chromecast Audio

[GoogleNestTeam]

Update 3/20/25

Hey folks, 

If you previously performed a factory reset, we’re happy to report that the Google Home app update will reach all users today.

Please make sure you’re on version 3.30.1.6 for Android and 3.30.106 for iOS to set up your Chromecast (2nd gen) and Chromecast Audio. Check out this help center article if you need help updating the Google Home app.

If you’re still experiencing problems during setup, please reach out to customer support for further assistance. 

Thanks again for your patience while we worked to resolve this issue!

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Update 3/17/25:

Hi folks,

Thank you for your patience as we worked to resolve the issue with Chromecast (2nd gen) and Chromecast Audio devices. As of today, this disruption has been fixed.

If you did not perform a factory reset, your device should now function normally. If it is still not functioning as intended check the firmware version of your device by following the instructions here. If your device is not on the corresponding firmware version, please try rebooting your device to start the update process.

For users who have performed a factory reset, you will need to update your Google Home app to the latest version (3.30.1.6 for Android and 3.30.106 for iOS) to set up your Chromecast (2nd gen) or Chromecast Audio device again. The app roll out has begun and may take a few days to roll out to everyone. We’ll post a confirmation once the roll out to all users is complete.

We sincerely apologize for this disruption and any inconvenience it may have caused, and we are committed to ensuring all users are back up and running as quickly as possible.

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Update 3/14/25:

Hi everyone,

Thank you again for your patience, we have some good news - the fix should reach all users today. If your device has received the update it should be on the following firmware versions:

Chromecast (2nd gen): Firmware version 1.56.467165

Chromecast Audio: Firmware version 1.56.467166

Check the firmware version of your device by following the instructions here. If your device is not on the corresponding firmware version, please try rebooting your device to start the update process.

Please note: If you performed a factory reset during the troubleshooting process, you may still be experiencing an issue where you cannot re-setup the device. The team is working diligently to resolve this, and we will provide next steps as soon as possible.

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Update 3/13/25:

Hey everyone, thank you for your patience while we work to resolve this issue. Here’s the latest:

We have started to roll out a fix for the problem with Chromecast (2nd gen) and Chromecast Audio devices, which will be completed over the next few days. Your device must be connected to receive the update.

If you performed a factory reset during initial troubleshooting, you may still be experiencing an issue where you cannot re-setup your device. We are working to resolve this as soon as possible. Please continue to check the Community page here for updates and next steps.

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Update 3/11/25: 

Hi all,

An update on the situation: the team has identified the cause of the issue impacting Chromecast (2nd gen) and Chromecast Audio devices.

Please do not factory reset your device. If you previously performed a factory reset during troubleshooting, you may also be experiencing an issue where you're unable to re-setup your device. The team has identified the cause for this as well and is currently working on a fix.

We’re working to resolve this as soon as possible, and will keep you updated when there is more to share.

We sincerely apologize for the inconvenience, and appreciate your patience in the meantime.

Thank you.

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Hello,

We're aware of an emerging issue impacting Chromecast 2nd gen and Chromecast Audio devices, and we 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.

[Edrizio]

Então esse que temos não serve mais ? 

[Rene11]

Ahora google dice que no restablescas el chromecast, muy mal por parte de google, el problema es global. 

[Karluixss]

No puedo establecer conección de Chromecast me pedía actualizar, lo resetie pero no jala. Sale un mensaje que dice que no se puede autenticar tu Chromecast. Ayuda

[Leomadryn]

Me pasas lo mismo desde hoy que estoy intentando y me aparece ese msj 

[CarlosM2206]

Muitos usuários estão reportando o mesmo, acredito que foi geral, aguardando uma solução 

[Lohester12]

Happening in TN, USA. Same thing. Tried all the fixes and then factory reset it. "Can't authenticate Chromecast."

[johnbutcheracad]

It is happening in Brazil, Argentina, Spain and USA, so far that I was able to noticed.

[Orielle]

Peru as well.

[Aurakin]

User tchebb on Reddit broke the issue down in a very comprehensive way. 

(TLDR: Certificate expired. Not much for us to do, except wait for Google to fix the core issue. There are some workarounds provided in the Reddit thread though!) 

https://www.reddit.com/r/Chromecast/comments/1j7lhrs/the_chromecast_2s_device_authentication/

[DebWilly]

Very technical breakdown of the problem.

Seems that Google need to change a certificate for 2nd generation chromecast devices. Great explanation and breakdown.

Now Google should be able to resolve the problem!!

[bumbJiggyK]

Holy smokes, the fixes in that thread are to die for. Wish I had the ability to soak it up and safely do it lol. Definitely NOT in my wheelhouse, but what a great read! Thanks for the heads up on that though! I did post a stand alone 'issue' here, instead of just my initial reply earlier, with the information that I had gathered-stating that it indeed seemed as though it was a coding issue or an AI glitch, lent heavy on the coding glitch though, since the permissions were dimmed out. Such an odd thing though. You'd think you could at least hook up to WiFi, but just not stream since-however that would be even more frustrating to me, imo. hagn, thanks again! 

[Bas3]

My chromecast stopped working yesterday afternoon, about four o'clock. And it's still not working. The Netherlands. Did Google punish me for watching porn on saturdaynight?😗😚

[Wendyf]

Same here, accept the porn 🤣

[Bas3]

Hoi Wendy, je bent best technisch hè? 

Hier is de oplossing, deels in Nederlands:

https://www.googlenestcommunity.com/t5/Streaming/Hoe-je-de-ChromeCast-2e-Editie-weer-werkend-krijgt/...

Groetjes Bas

[Nissalea]

I have the same problem with 2 chromecast and am in Australia..  No clue how to actually fix the problem.. 

[Steve_D]

search "Google Chromecast Outage"

its global.  news headlines all over

[Tonyk67]

Google's second-generation Chromecast and its Chromecast Audio are suffering a major ongoing outage, with devices failing to cast due to an expired security certificate. The web giant is aware of the breakdown and says a fix is in the works.

On Sunday, many users of these gadgets encountered an "untrusted device" error, preventing them from casting content to TVs and other displays. Tech-savvy netizens quickly traced the issue to an expired intermediate certificate authority – created by Google to handle authentication for the affected equipment – which lapsed on March 9, 2025, at 1644 UTC after 10 years of validity. Models relying on this authority no longer work as expected due to this expiry; they can't securely connect to Google's backend systems and authenticate themselves.

"We're aware of an emerging issue impacting Chromecast 2nd gen and Chromecast Audio devices, and we are working on a fix," Google told The Register on Monday.

In an update on the Google Nest community site, where Chromecast support seems to live these days, the internet titan added, "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."

[Spekski66]

Same with my Chromecast in the Netherlands, did everything to reconnect but noting worked. Hope Google will fix this problem soon.

[Spekski66]

I read that it's global Google doesn't support the Chromecast 1 and 2, they want us to buy Google TV, if this is true I will never buy any product of them. Then Apple will be my middlename.

[gerzellmann]

My chromecast gen1 is still working fine, only problem with my gen2

[Ritesh1]

I have tried factory reset but not I am not to connect to cast device with authentication error. How I should resolve this any steps which will help here

[GiacomoMilazzo]

No way. It's a problem that only Google can resolve with an upgrade. But the question is (I've reset to fabric too one of my 2 devices): a reset device will be configurable in some way to get the update?

[BadFlash]

Yes , just set the date on your phone to March 7th 2025 and add it back.

[Ravi009]

The same happened,  I tried to do everything, factory reset etc multiple time, but I am unable to even connect with chromecast after reset with the 4 digit code from TV as it's not appearing even after 20 efforts

[GiacomoMilazzo]

You don't need to factory reset multiple times...just one is enough! 😉

[trob1]

We reset multiple times because the one time did not work. 

[eviltwinhans]

I saw the same topics in 2023 and the problem is still here. 

- Do you want to configure Chromecast1633?

- Yes

- Connecting... No, authentication failed, please proceed to the article that can't help with your problem.

So frustrating and disappointing.

[yanelp]

Me pasa lo mismo. Soy de Argentina.

[Tinajensen]

Samme problem sidder, jem med nu.

[Hds]

Same here in France...

[morf]

Today, all my chromecast audio were offline! Resetted all devices (factory reset). Tried to add them back with google home. It says they are untrasted device, I m not able to have my  any chromecast audio back to my google home!

I think it is happened after an update. Google please...don't do update. You are not able anymore to do a good company! Please just don't do nothing...

[byeager]

I'm in the same boat. My nest devices are working fine, it's just the Chromecast devices that will not connect. What is going on with this?

[hybridalienrob]

Same here,  chromecast switched off halfway through a program and can't setup now.  Sort it out Google please 

[gabrielhopkins]

Me too. 5 chromecast audio devices working fine earlier today and now not at all.

[Anonymous]

Chromecast no me dejaba hacer streaming y después de resetearlo no se puede configurar y añadir a Google home. Me dice que no se ha podido autentificar mi Chromecast y que acuda a una página de soporte. Alguien sabe que pasa?

[Abc21]

A mí me a pasado lo mismo, no sé que hacer, haber si alguien saben cómo solucionarlo 

[MR15]

En reddit avisaron que es generalizado. Google aun no se pronuncia, pero se supone que tiene soporte hasta septiembre asi que ESPERO que sea un bug.

[claudiafalkoski]

Me aconteceu a mesma coisa. 

Ontem estava funcionando,hoje não funcionou. 

Resetei e tentei reinstalar e sempre dá mensagem que não foi possível autenticar. Aparece o código na TV, mas no google home aparece essa mensagem e não é possível concluir a instalação. 

[DarceeSchmidt]

My Chromecast just stopped working today, It's either a gen 2 or gen 3.  I tried to reconnect it in the Home app (android), but it was set up, just not registering my wifi.  Nothing worked from the troubleshooting guidelines, so I ended up doing a hard factory reset. I deleted the old setting from the Home app.  Now, my CC won't even get set up.  When I open the Home app I click on "add device" it will find my CC and then want to establish a temporary internet connection.  After that it thinks and thinks and then says "unfortunately I cannot communicate with your CC."  

I have done all these steps before and after the factory reset: 

1. Make sure your Chromecast is close to the Wi-Fi router. If you have a dual band router, try to set up your device on both the 2.4 GHz and 5 GHz bands.
2. Make sure Wi-Fi and Bluetooth are both turned ON on your phone or tablet.
3. Turn OFF mobile/cellular data.
4. Reboot your router. Most routers just require that you unplug the power source and then plug it back in to reboot.
5. Reboot Chromecast by removing the power cable, then reconnect it.
6. Make sure you're using the latest version of the Google Home app, by checking your app store for any updates.
7. Restart the Google Home app.

Nothing works.  I do not have an older device that supports the Google Home app (I tried) and we only have 1 TV.   Any tips/advice are welcome. 

I also tried to connect to the CC's wifi and open the Google Home App and see what happens then, but it still does not work.   

[Paleo16]

Exactly the same problem here (Gen II device in the Netherlands). I also saw some Spanish and Portuguese language posts complaining about the same issue posted not long before your entry, so it might be a global bug that's very recently crossed some wires. If so, I think (hope) that the issue will be fixed soon. Until then, I'm keeping an eye (and an email alert) on this comment section.