Thermostat shows child lock or lock symbol and does not respond to button presses, but app control still works.

Safety first: No safety risks; this is a configuration issue.

Steps:

• Check Ally app: Open the device settings in the Ally app and look for a child lock or keypad lock option. Disable it.
• Use button sequence: If supported, hold specific buttons (see manual) for several seconds to toggle the lock state.
• Confirm unlock: Verify that the lock symbol disappears and that local button control is restored.