Thermostat is very slow to respond to touch or app commands; menus lag or freeze.

Safety: No high‑voltage work is required.

• Reboot device: Power cycle the thermostat by turning off the HVAC breaker for 1 minute, then restore power.
• Update firmware: Use the Bosch app to check for and install the latest firmware, which may improve performance.
• Simplify schedules: Reduce the number of complex schedules, scenes, or automation rules to lighten processing load.
• Check for overheating: Ensure the thermostat is not in a hot, enclosed space. Improve airflow around it.
• Replace if persistent: Ongoing severe lag after updates and resets may indicate internal hardware issues.