Thermostat or TRV frequently shows child lock or locked symbol and cannot be adjusted locally.

Safety: No electrical work is required.

• Disable lock in app: Open the Eurotronic app and check if child lock or local lock is enabled for the device. Disable it if not needed.
• Use unlock sequence: Follow the manual’s key combination (e.g., hold two buttons for several seconds) to unlock the device.
• Check for stuck buttons: Ensure no button is physically stuck in the pressed position.
• Update firmware: Install the latest firmware to correct any lock-related bugs.