What does the Vaillant ecoFIT pure F24 fault code mean?
The F24 fault code on a Vaillant ecoFIT pure boiler indicates an overheating issue, which can lead to the boiler shutting down to prevent damage. This fault typically arises from problems in the heating system or component failures.
Common Causes
- Blocked Heat Exchanger: A buildup 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 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 crucial 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 an F24 fault could range from £150 to £300, depending on whether the heat exchanger needs cleaning or replacement, as well as the labour costs involved.