What does the Worcester Bosch Greenstar CDi F45 fault code mean?
The F45 fault code indicates a problem with the flue system of the Worcester Bosch Greenstar CDi boiler. This could be due to blockages, incorrect installation, or damage to the flue components, affecting the safe expulsion of combustion gases.
Common Causes
- Blocked Flue: Debris, such as leaves or bird nests, may obstruct the flue, preventing proper ventilation.
- Incorrect Installation: If the flue has been installed incorrectly, it may not function as intended, leading to safety issues.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer for any issues related to the flue system, as improper handling can pose serious safety risks, including carbon monoxide exposure.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F45 fault could range from £150 to £300, depending on whether the flue needs cleaning or replacement. This cost reflects the complexity of the work and the need for a qualified engineer.