What does the Worcester Bosch Greenstar i F27 fault code mean?
The F27 fault code on the Worcester Bosch Greenstar i indicates a problem with the boiler’s pump, which is responsible for circulating water through the heating system. This fault can lead to inadequate heating and potential system failures if not addressed promptly.
Common Causes
- Blocked Pump: Debris or sediment may be obstructing the pump, preventing it from functioning properly.
- Electrical Fault: Issues with the electrical supply to the pump, such as a blown fuse or faulty wiring, can also trigger the F27 fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any repairs related to the pump, as it involves gas and electrical components that require professional expertise. Attempting to fix it yourself could pose safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F27 fault code is around £150 to £250, depending on whether the pump needs cleaning or replacement. This cost reflects the price of parts and the labour involved in a professional service.