What does the Baxi Duo-tec F95 fault code mean?
The F95 fault code on a Baxi Duo-tec boiler indicates a domestic hot water (DHW) emergency fault, which typically means that the boiler is unable to provide hot water due to a malfunction. This can be caused by various issues, including sensor failures or problems with the water flow.
Common Causes
- Faulty DHW Sensor: The sensor responsible for detecting the temperature of the hot water may be malfunctioning, leading to incorrect readings and triggering the fault code.
- Blocked Heat Exchanger: A blockage in the heat exchanger can prevent the efficient transfer of heat, causing the boiler to fail in producing hot water.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves gas and electrical components that require professional expertise. Attempting to fix it yourself could be dangerous.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F95 fault could be around £150 to £250, primarily depending on whether the DHW sensor needs replacement or if the heat exchanger requires cleaning or servicing.