Sensi Touch Thermostat Not Connecting to WiFi or App

Problem Description

Your Sensi Touch Smart Thermostat is not connecting to WiFi, showing offline in the Sensi app, or not responding to remote temperature changes.

Common Causes

• WiFi credentials changed
• Thermostat out of WiFi range
• Network requires 2.4GHz (5GHz not supported)
• Router security settings blocking connection
• App needs re-authentication

Solutions

1. Check WiFi Status on Thermostat

1. Tap the WiFi icon on the thermostat display
2. Check if it shows connected or searching
3. Signal strength bars indicate connection quality

2. Verify Network Requirements

• Must be 2.4GHz network (5GHz not supported)
• WPA/WPA2 security required
• Network name should not have special characters
• Password limited to certain lengths

3. Reconnect to WiFi

1. On thermostat, tap Menu then WiFi
2. Select your network from available networks
3. Enter password using on-screen keyboard
4. Wait for connection confirmation

4. Check Router Settings

• Disable AP isolation if enabled
• Ensure MAC filtering is not blocking thermostat
• Check that DHCP has available addresses
• Try temporarily disabling firewall

5. Re-register in Sensi App

1. Open Sensi app
2. Delete the thermostat from your account
3. Tap Add Thermostat
4. Follow the setup process to re-add

6. Power Cycle Thermostat

1. Remove thermostat from wall plate
2. Wait 30 seconds
3. Reinstall on wall plate
4. Wait for it to boot and reconnect

7. Factory Reset

1. Go to Menu then About
2. Select Reset then Factory Reset
3. Confirm the reset
4. Set up thermostat again from scratch

When to Contact Support

Contact Sensi/Emerson Support if the display is not working, HVAC is not responding, or you see persistent error codes.