What does the Worcester Bosch Greenstar Ri F24 fault code mean?
The F24 fault code indicates that the boiler is experiencing overheating issues, which can lead to potential damage if not addressed promptly. This typically occurs when the temperature of the water in the system exceeds safe operating limits.
Common Causes
- Blocked Heat Exchanger: A build-up of debris or limescale can restrict water flow, causing the boiler to overheat.
- Faulty Thermostat: If the thermostat is malfunctioning, it may not accurately read the water temperature, leading to overheating.
Can I fix it myself? (DIY)
It is advisable to call a Gas Safe Engineer for this issue, as it involves gas and electrical components that can be dangerous if handled incorrectly. Attempting to fix it yourself may void any warranties.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F24 fault could range from £150 to £300, depending on whether the heat exchanger needs cleaning or replacement, or if the thermostat requires servicing. This cost reflects the complexity of the repairs and the need for professional expertise.