What does the Worcester Bosch Greenstar Ri F23 fault code mean?
The F23 fault code indicates a flame failure in the Worcester Bosch Greenstar Ri boiler. This means that the boiler is unable to detect a flame during the ignition process, which can prevent it from operating correctly.
Common Causes
- Blocked Flue: A blockage in the flue can prevent exhaust gases from escaping, leading to a flame failure.
- Faulty Ignition Electrode: If the ignition electrode is damaged or dirty, it may not create a spark to ignite the gas.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any gas or electrical issues. Attempting to fix these problems without proper training can be dangerous.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F23 fault could be around £150 to £250, depending on whether the issue is a simple cleaning or requires replacement parts like the ignition electrode.