What does the Worcester Bosch Greenstar Si F55 fault code mean?
The F55 fault code indicates a problem with the ignition system of the Worcester Bosch Greenstar Si boiler. This typically means that the boiler is unable to ignite due to issues with the ignition electrode or related components.
Common Causes
- Faulty Ignition Electrode: The ignition electrode may be damaged or dirty, preventing it from creating a spark.
- Gas Supply Issues: Insufficient gas supply or blockages in the gas line can hinder ignition.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any gas or electrical issues, as working on these systems can be dangerous. However, you can check the gas supply and ensure that the boiler is properly reset by following the manufacturer’s instructions.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F55 fault code is around £150 to £250, primarily due to the potential need for replacing the ignition electrode or addressing gas supply issues, which can require professional intervention.