What does the Worcester Bosch Greenstar Si F73 fault code mean?
The F73 fault code on the Worcester Bosch Greenstar Si indicates an issue with the temperature settings, often related to the boiler’s ability to regulate water temperature effectively. This can lead to overheating or insufficient heating, affecting the overall performance of the system.
Common Causes
- Faulty Temperature Sensor: A malfunctioning temperature sensor can provide incorrect readings, causing the boiler to mismanage heating levels.
- Control Board Issues: Problems with the control board can disrupt the communication between components, leading to improper temperature regulation.
Can I fix it myself? (DIY)
If you are comfortable with basic boiler maintenance, you can try resetting the boiler by turning it off and on again. However, for any gas or electrical issues, it is crucial to call a Gas Safe Engineer to ensure safety and compliance with regulations.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F73 fault could range from £150 to £300, depending on whether the temperature sensor or control board needs replacement. This estimate includes parts and labour, reflecting the complexity of diagnosing and fixing electronic components.