Google Nest Learning Thermostat Not Connecting

The Google Nest Learning Thermostat (4th gen) and Nest Thermostat E provide smart HVAC control with learning capabilities. This guide covers connectivity and control issues.

Thermostat Not Connecting to WiFi

Symptoms

• WiFi setup fails
• Can't join network
• Shows offline in app

Solutions

1. Use Google Home app - Set up and control via Google Home app.
2. WiFi networks - Supports 2.4GHz and 5GHz networks.
3. Settings > Network - Navigate to WiFi setup in thermostat settings.
4. Check password - WiFi password is case-sensitive.
5. Restart thermostat - Settings > Reset > Restart to reboot.

Not Controlling HVAC

Symptoms

• Heat/cool won't turn on
• System short cycles
• Delayed HVAC response

Solutions

1. Check wiring - In Google Home, verify wiring diagram matches your system.
2. System compatibility - Some systems aren't compatible. Check Nest compatibility tool.
3. Compressor delay - Built-in 5-minute delay protects compressor.
4. Power issues - If battery low, check for C-wire or use Nest Power Connector.

Learning Not Working

Symptoms

• No learned schedule appearing
• Temperature preferences not saved
• Auto-schedule seems wrong

Solutions

1. Enable learning - Verify auto-schedule is enabled in settings.
2. Manual adjustments - Nest learns from manual temperature changes.
3. Time needed - Takes 1-2 weeks to learn your patterns.
4. Reset schedule - Clear schedule and let it relearn if incorrect.

Temperature Sensor Issues

Symptoms

• Temperature reading wrong
• Additional sensors not working
• Sensor shows offline

Solutions

1. Placement - Avoid direct sunlight, drafts, and heat sources.
2. Temperature sensors - Add Nest Temperature Sensors for multi-room sensing.
3. Sensor battery - Replace CR2 battery in external sensors.
4. Re-pair sensor - Remove and re-add sensor if offline.

Home/Away and Eco Mode

Symptoms

• Doesn't detect when home
• Eco mode activates while home
• Home/Away Assist issues

Solutions

1. Phone location - Enable location for Google Home app on all household phones.
2. Home/Away Assist - Configure in thermostat settings in Google Home.
3. Multiple phones - Add all household members to the home.
4. Activity sensor - Nest has built-in motion sensor for presence.