What does the Worcester Bosch Greenstar 8000 Lifestyle E257 fault code mean?
The E257 fault code indicates a pump monitoring fault, suggesting that the boiler’s pump is either not operating correctly or is not being monitored properly by the control system. This can lead to inadequate circulation of water within the heating system, potentially causing overheating or system failure.
Common Causes
- Faulty Pump: The pump may have failed mechanically or electrically, preventing it from circulating water effectively.
- Wiring Issues: Damaged or loose wiring connections to the pump can disrupt communication between the pump and the control board, leading to monitoring faults.
Can I fix it myself? (DIY)
It is advised to call a Gas Safe Engineer for this issue, as it involves electrical components and potential gas safety risks. Attempting to fix it yourself may void warranties or lead to further complications.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the E257 fault could be around £250 to £400, primarily depending on whether the pump needs replacement or if wiring repairs are necessary. This estimate includes parts and labour for a qualified engineer.