What does the Vaillant ecoTEC pro F98 fault code mean?
The F98 fault code on the Vaillant ecoTEC pro indicates a problem with the system inspections, which may involve issues with the boiler’s internal components or sensors. This fault typically requires a thorough examination to identify the underlying cause.
Common Causes
- Faulty Sensors: Malfunctioning temperature or pressure sensors can lead to incorrect readings, triggering the F98 fault code.
- Internal Component Failure: Issues with internal components such as the heat exchanger or circuit board may cause the system to fail inspections.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer for this fault, as it involves complex internal components and safety risks. Attempting DIY repairs could lead to further damage or safety hazards.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F98 fault code is around £250 to £400, depending on whether sensors or internal components need replacement. This cost reflects the complexity of the repairs and the need for professional expertise.