What does the Worcester Bosch Greenstar i F73 fault code mean?
The F73 fault code indicates a problem related to system maintenance, often suggesting that the boiler has detected an issue that requires attention to ensure safe and efficient operation. This may involve checking the system pressure or addressing other maintenance-related concerns.
Common Causes
- Low System Pressure: Insufficient water pressure in the heating system can trigger the F73 fault code, indicating a need for pressure adjustment.
- Blocked Filters or Valves: Blockages in the system, such as dirty filters or closed valves, can impede water flow and lead to maintenance faults.
Can I fix it myself? (DIY)
If the issue is related to low system pressure, you can attempt to repressurise the system by following the manufacturer’s instructions for adding water. However, for any gas or electrical issues, it is crucial to call a qualified Gas Safe Engineer to ensure safety and compliance with regulations.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F73 fault code could range from £100 to £200, primarily depending on whether the issue is simply a pressure adjustment or if it involves cleaning or replacing blocked components.