What does the Worcester Bosch Greenstar Ri F22 fault code mean?
The F22 fault code indicates a dry fire condition or low water pressure in the boiler system. This typically means that the boiler is unable to detect sufficient water pressure to operate safely, which can lead to overheating and potential damage.
Common Causes
- Low Water Pressure: This can occur due to leaks in the system or insufficient water supply, preventing the boiler from functioning properly.
- Air in the System: Trapped air can cause pressure issues, leading to the boiler not being able to circulate water effectively.
Can I fix it myself? (DIY)
You can attempt to fix low water pressure by checking the pressure gauge and re-pressurising the system if necessary. However, if the issue persists or if you suspect a gas or electrical fault, it is crucial to call a Gas Safe Engineer.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F22 fault code is around £150 to £250, primarily for re-pressurising the system and checking for leaks. If additional repairs are needed, such as replacing components, costs may increase accordingly.