W5 error, won't connect

[RKBeckV]

Our upstairs thermostat won't connect to WiFi, shows W5 error.

[David_K]

Try these steps:

Troubleshoot a Nest thermostat W5 code - Google Nest Help

[RKBeckV]

Thanks David. We've tried everything though, nothing gets it working. They've accepted it is faulty and are sending a replacement.