Requirements: Servicing and Component Checks
Standard mechanical thermostats and programmers typically have fewer electronic components. Their wear points are often mechanical contacts and bimetallic strips, which can stick or become inaccurate over time. Smart controls, with their integrated circuit boards, wireless modules, and touchscreens, introduce more potential failure points. While no dedicated annual service for the control unit itself is usually required by manufacturers, a qualified engineer should visually inspect all wiring and connections to the boiler during your annual boiler service. This includes checking for signs of overheating or loose terminals at both the thermostat and the receiver unit.
- Annual visual check during boiler service.
- Inspect wiring terminals for security.
- Confirm control unit is securely mounted.
- Check battery condition in wireless units.

