What does the Worcester Bosch Greenstar Ri F65 fault code mean?
The F65 fault code indicates a system lockout due to a fault within the boiler’s operation. This typically means that the boiler has detected an issue that prevents it from functioning safely and efficiently.
Common Causes
- Low Water Pressure: Insufficient water pressure can trigger a lockout to prevent damage to the system.
- Faulty Sensors: Malfunctioning temperature or pressure sensors may cause the boiler to incorrectly assess its operating conditions.
Can I fix it myself? (DIY)
If the issue is related to low water pressure, you can attempt to repressurise the system by using the filling loop. However, for any electrical or gas-related issues, it is crucial to call a Gas Safe Engineer to ensure safety and compliance with regulations.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving an F65 fault could range from £150 to £300, depending on whether it involves a simple pressure adjustment or the replacement of faulty sensors, which can be more expensive.