What does the Worcester Bosch Greenstar i 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 fault typically arises 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 regulate the water temperature, leading to overheating.
Can I fix it myself? (DIY)
While some issues may be resolved by checking the pressure and resetting the boiler, it is highly recommended to call a Gas Safe Engineer for any gas or electrical problems to ensure safety and compliance with regulations.
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 issue is a simple reset or requires replacement of parts like the thermostat or heat exchanger.