What does the Worcester Bosch Greenstar Si F58 fault code mean?
The F58 fault code indicates a problem with the gas pressure in the Worcester Bosch Greenstar Si boiler. This can prevent the boiler from operating efficiently or safely, leading to heating and hot water issues.
Common Causes
- Low Gas Pressure: Insufficient gas supply to the boiler can trigger this fault, often due to issues with the gas meter or supply line.
- Blocked Gas Line: A blockage in the gas line can restrict the flow of gas, causing the boiler to detect low pressure and display the F58 code.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer to address this issue, as working with gas appliances can be dangerous. Attempting to fix gas pressure problems without proper training can lead to serious safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F58 fault could be around £150 to £250, depending on whether the issue is a simple adjustment or requires replacement parts, such as a gas valve or regulator.