← Full guide: Nest Thermostat Won't Connect — Power, Wi-Fi, App Checks
Nest is offline in the app but thermostat still controls heating/cooling locally
If local temperature control works, the HVAC side is alive; focus on Wi-Fi/app/cloud connectivity instead of touching thermostat wiring first.
Start here
If local temperature control works, the HVAC side is alive; focus on Wi-Fi/app/cloud connectivity instead of touching thermostat wiring first.
Check these first
- Verify local temperature adjustment works.
- Read thermostat Network status/code.
- Check whether other Nest devices are also offline.
Fix it in this order
- Check Internet/router.
- Restart thermostat/network as Google directs.
- Reconnect Wi-Fi or update network credentials.
- If only the app fails, troubleshoot app/account separately.
Evidence to keep
- Local control result
- Network code
- Other-device status
Do not make it harder
- Rewiring a thermostat that is controlling HVAC normally
How you know it is fixed
- Local control and app control both work and remain connected.
If the obvious fix does not work
- If all Nest devices are offline, start with home Internet/service status.
- If only this thermostat is offline and shows W5, use the W5 path.
If this still isn't resolved
- Google Nest Support
Sources for this path
Use these references to confirm provider-, model-, policy-, or jurisdiction-specific details before an irreversible step.
Need the complete context?
This page solves one branch. The parent guide covers the full decision, edge cases, alternatives, and related checks.