Symptoms
- App shows outdated temperature or mode
- Changes in the app don't appear on the thermostat
- Changes on the thermostat don't appear in the app
Likely causes
- CommonThermostat's Wi-Fi connection is weak or droppedWithout a stable connection, the thermostat can't report changes to the cloud.
- PossibleManufacturer server outageCloud service outages happen occasionally and are outside your control.
- PossibleOutdated app versionAn old app version can have sync bugs fixed in a later release.
- PossibleThermostat needs a restartA stuck internal process can block syncing until the device restarts.
- Less commonAccount or device pairing issueThe thermostat may have become unlinked from your account.
What to do
- Check the thermostat's Wi-Fi status on its own screen to confirm it's connected.
- Close and reopen the app, or force-quit and relaunch it on your phone.
- Check for app updates in your phone's app store and install any available update.
- Restart the thermostat by removing it from its base or cycling batteries for 30 seconds.
- Check the manufacturer's status page or social media for reported outages.
- If sync issues persist, try signing out and back into the app, or removing and re-adding the device.
Tools and parts
- Smartphone with the thermostat app
When to call a pro
Contact the manufacturer's support if sync problems continue after reconnecting Wi-Fi and updating the app.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.