What does the Worcester Bosch Greenstar Si F72 fault code mean?
The F72 fault code indicates an issue with the pressure settings of the boiler, which may prevent it from operating correctly. This can lead to insufficient heating or hot water supply.
Common Causes
- Low Water Pressure: Insufficient water pressure in the system can trigger the F72 fault code, often due to leaks or insufficient filling.
- Faulty Pressure Sensor: A malfunctioning pressure sensor may incorrectly report pressure levels, causing the boiler to shut down.
Can I fix it myself? (DIY)
If you are comfortable, you can check the pressure gauge and attempt to re-pressurise the system by adding water through the filling loop. However, if the issue persists or if you suspect a fault with the pressure sensor, it is strongly advised to call a Gas Safe Engineer.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F72 fault may range from £150 to £250, depending on whether it requires a simple re-pressurisation or replacement of the pressure sensor, which can be more expensive.