What does the Vaillant ecoTEC exclusive F98 fault code mean?
The F98 fault code on the Vaillant ecoTEC exclusive indicates a failure related to energy standards compliance, often linked to the boiler’s efficiency or emissions. This fault may prevent the boiler from operating correctly to meet regulatory requirements.
Common Causes
- Faulty Sensor: A malfunctioning sensor that monitors energy efficiency may trigger this fault code.
- Software Issue: Outdated or corrupted software in the boiler’s control system can lead to incorrect readings and the F98 error.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it may involve complex electrical or gas components that require professional expertise to ensure safety and compliance.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F98 fault could be around £150 to £250, primarily depending on whether a sensor replacement or software update is required, along with the engineer’s labour charges.