What does the Baxi Duo-tec F97 fault code mean?
The F97 fault code on a Baxi Duo-tec boiler indicates a critical fault related to the domestic hot water (DHW) system. This typically means that the boiler is unable to provide hot water due to a malfunction in the system.
Common Causes
- Faulty DHW Sensor: The sensor that monitors the temperature of the hot water may be defective, preventing the boiler from functioning correctly.
- Blocked Heat Exchanger: A blockage in the heat exchanger can restrict water flow, leading to insufficient heating and triggering the fault code.
Can I fix it myself? (DIY)
It is highly recommended to call a Gas Safe Engineer for this issue, as it involves gas and electrical components that can be dangerous if mishandled. Attempting to fix it yourself may void any warranties and pose safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F97 fault could be around £200-£300, primarily due to the potential need for replacing the DHW sensor or cleaning the heat exchanger, which requires professional expertise.