What does the Worcester Bosch Greenstar Si F51 fault code mean?
The F51 fault code indicates a problem with the gas supply to the boiler, which may prevent it from igniting or operating correctly. This issue can arise from various factors affecting the gas line or the boiler’s internal components.
Common Causes
- Gas Supply Interruption: A blockage or leak in the gas line can disrupt the flow of gas to the boiler.
- Faulty Gas Valve: A malfunctioning gas valve may fail to open or close properly, preventing gas from reaching the burner.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer for any issues related to gas supply or electrical components, as these can be dangerous and require professional expertise.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F51 fault could range from £150 to £300, depending on whether the issue is a simple gas supply blockage or if a replacement gas valve is needed.