What does the Worcester Bosch Greenstar Si F48 fault code mean?
The F48 fault code indicates a problem with the condensate trap in the Worcester Bosch Greenstar Si boiler. This typically means that the condensate trap is either blocked or malfunctioning, preventing proper drainage of condensate water.
Common Causes
- Blocked condensate trap: Debris or sludge can accumulate in the trap, obstructing the flow of condensate.
- Faulty trap mechanism: The internal components of the trap may be damaged or worn out, leading to failure in operation.
Can I fix it myself? (DIY)
It is advisable to call a Gas Safe Engineer to address this issue, as working on boiler components can be dangerous and requires professional expertise.
Estimated Repair Cost (2026 UK Prices)
The estimated cost for repairing or replacing the condensate trap is around £150 to £200. This includes parts and labour, as the trap itself is relatively inexpensive, but professional installation is necessary for safety and compliance.