What does the Worcester Bosch Greenstar Si F74 fault code mean?
The F74 fault code indicates an issue with the flow settings of the boiler, which may affect its ability to operate efficiently. This could lead to problems with heating or hot water delivery.
Common Causes
- Incorrect Flow Rate Settings: The flow rate may be set incorrectly, preventing the boiler from functioning properly.
- Sensor Malfunction: A faulty flow sensor could be providing inaccurate readings, leading to the F74 error.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves technical settings and potential gas safety risks. Attempting to fix it without proper expertise could lead to further complications.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F74 fault code is around £150 to £250. This includes potential replacement of the flow sensor and recalibration of the flow settings, which are common issues associated with this fault.