Thermostat displays 'Service Due' or wrench icon; heating still operates normally.

Safety first: This is a reminder, not a fault. However, regular boiler servicing is essential for safety.

• Arrange service: Book a Gas Safe registered engineer to service the Worcester Bosch boiler.
• Reset reminder: After service, the engineer or user (if allowed) can reset the service reminder in the thermostat or boiler menu.
• Do not ignore: While the system may continue to work, overdue servicing can lead to inefficiency and potential safety issues.