What does the Worcester Bosch Greenstar i F63 fault code mean?
The F63 fault code indicates a mechanical fault within the heating system of the Worcester Bosch Greenstar i boiler. This typically suggests issues with components such as the pump or diverter valve, which may be affecting the system’s operation.
Common Causes
- Faulty Pump: A malfunctioning pump can prevent water circulation, leading to overheating and triggering the F63 fault code.
- Diverter Valve Issues: If the diverter valve is stuck or malfunctioning, it can disrupt the flow of water between the heating and hot water systems.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves mechanical components that require professional expertise. Attempting to fix it yourself could lead to further damage or safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving an F63 fault could range from £150 to £300, depending on whether the pump or diverter valve needs replacing. This estimate includes parts and labour, reflecting the complexity of the repairs involved.