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!

------------------------------

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.

------------------------------

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.

------------------------------

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.

------------------------------

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.

------------------------------

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.

[KarlWS]

I have the same error message appear on 4 of my 5 Chromecast devices. I even tried factory resetting 1 of them, but during the process, it said something like, "can not connect to your Chromecast". These 4 non-working Chromecast devices worked fine until yesterday, 3/9/25. I have a screenshot of the error message, but don't see any way to post it to this message. 

[Kilovolt]

Ohio here

Have the same issue.

Tried resetting it, didn't help. Saying it can't authenticate.

[mskelsey]

Me too, both Chromecast and my Chromecast audio and a Google nest screen as well.

[NTL42]

Same issue as described, 

ROKU / fire stick or other alternatives are looking more and more attractive given the recent flakey behaviour and increasingly annoying ads inserted everywhere with the price and size of new devices on a par with apple who don't have ads everywhere!

Google are going down hill fast..... 

[Uacata]

Mi associo a queste segnalazioni dall'italia. Da ieri non funzionano più tutti i chromecast!! Fate qualcosa per favore!

[emmaemma]

Yes! So glad I found this post. We are in Australia and suddenly none of the TV's or devices will work either on Apple or Android. Because we aren't in the US I didn't think about the daylight savings change. Anyone find a fix yet? 😞 

[samah]

Same problem from yesterday 9th March I'm facing.  May be firmware outdated. After resetting device still showing "we couldn't authenticate your chromcast. 

[SebinParis]

And my device is a NC2-6A5

[Karbar63]

Same here Chromecast worked earlier now I can't get it to connect and getting message like everyone else"can't authenticate" Google. what's up ? It stinks that you have no human customer support number to call as I have had issues with several things by Google and only thing offered is AI and this chat site 

[Abigail1]

Ola 

Alguien que me ayude para volver a conectar mi Chromecast de nuevo 🥺

[DURA123]

I am in u.k same problem I try everything still don't wrk 

[ctgarvey]

during the phonecall, the team did recognise there was a world wide problem. And this was reported in the global media this morning. There is no fix yet. And its not clear if there will be a fix.

[m16Kris]

I'm so mad 😡 

This isn't the first time. I found a post about this same issue from 2023. The solution was to use Google TV to update the chrome cast but I don't have a Google TV.

[Tonyk67]

Same problem. Woke up to find my device (chromecast) no longer a trusted device?? Reset it but now Google Home App can't authenticate it???

What is going on with Google device support? Why all the changes without warning or notice or ability to opt out / over-ride

[NikunjDadhania]

I am facing the same issue.

[PratikP]

Same error to me as well, we couldn't authenticate.

[Terry28]

Same in Melbourne 

[Taimoor]

I am facing the same error from Pakistan 

[gerzellmann]

I have the same issue. Yesterday suddenly youtube showed an authentication issue when i tried to cast my phone to my chromecast 4800. After that the chromecast couldn't be found at my network anymore. Finally applied a factory reset to my chromecast, but setting up through my Home app results in the 'We couldn't authenticate your Chromecast", while the chromecast can be seen on my network. I have an generation 1 chromecast also on the same network, this one is still functioning without problems. Anybody a clue? 

[yakovmisafhi]

I have 3 Chromecast devices and they all became untrusted suddenly. I rest them, removed them from Google home, disconnected everything from Google home, but nothing can seem to work! Chromecast devices are functional, displaying hour, tv code, but they can't connect. 

[Sulu]

Yip. Looks like Google has 'bricked' the second gen Chromecast. Gone burger. RIP.

[supratim29d]

I am also getting the same issue.. I tried to factory rest the device and now I am not able to connect with my chrome cast.

So disappointed 

[Squeakypics]

Same here. I've done a factory reset and it says it can't authenticate. There is something up with google😭

[waff]

Adding to this. Please fix this issue.

[gedelys]

Bonjour, 

J'ai le même problème que les autres, impossible de caster sur un Chromecast 2ème génération. 

J'ai réinitialisé le Chromecast, supprimé de l'application Home et maintenant impossible de le rajouter à ma Maison. Lors d'une tentative d'ajout à Home, le Chromecast indique qu'il ne sait pas être authentifié et qu'il y a probablement un problème de micrologiciel.

N'ayant pas envie d'acheter un nouveau streamer de Google, je risque d'aller voir la concurrence et de changer d'environnement...

Très mauvaise idée de Google d'avoir abandonné le support de ces anciens Chromecast qui sont encore fonctionnels. 

[mathiasgenvagen]

Same issue here on 2 out of 3 gen 2 devices.

[AdityaSrivastav]

Facing same issue, Chromecast casting stopped and stating ChromeCast (old model) has an untrusted firmware.
Please provide the solution for this .

[fycheong]

Yes lar......... we are not alone. My location is in Singapore, have the same problem few hours ago.

I have done the long way, removing all google home device and also removed my home.

Re-setup everything all over again. My Chromecast still can't works 

[AnaIn]

El mismo problema me esta pasando

[Stoneageman1]

Same is happening to me

[Dasch]

Same.

[BlueyandBingo]

Same issue in Australia, all resets tried. Gen 2. Seems likely that its a firmware update issue. 

[Kris_1992]

I had the same problem yesterday evening, UK time.

My photo frame stopped. I tried resetting it to add it to Home again and, ever since, I get some strange authentication error on the Home App and it that doesn't allow me to register it again.

Have they killed the Chromecast remotely?

[shankarraj86]

Yesterday I was able to cast my phone and phone apps on my non android TV through the chromecast i purchased in 2016. But from today onwards I am unable to cast any app on my TV. Getting the same untrusted firmware/outdated firmware error. By what time will this be resolved .????

[Gercas]

Me pasa igual

[AbdulQ]

Same here

Google team please resolve ASAP

[Rmalkawi]

Same problem here I reset it and now couldn’t connect to again 

any possible solution??

[Quimey07]

Same here, Hope we get a response soon 

[PLACIDOE14]

hello,

I'm just wondering if the issue/error mentioned is fixed? My device is having the said issue still.

[NeilR]

Same issue in UK. All my Chrome cast devices have stopped working.