What does the Glow-worm Ultimate F97 fault code mean?
The F97 fault code indicates a warning related to the domestic hot water (DHW) pump. This typically suggests that the pump is either malfunctioning or not operating as intended, which can affect the heating of water in the system.
Common Causes
- Blocked DHW Pump: Debris or scale buildup can obstruct the pump, preventing it from circulating water effectively.
- Electrical Fault: Issues with the wiring or connections to the pump can lead to a failure in operation, triggering the fault code.
Can I fix it myself? (DIY)
It is advisable to call a Gas Safe Engineer for this issue, as it involves electrical components and potential safety risks. Attempting to fix it yourself could lead to further damage or safety hazards.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F97 fault could be around £150 to £250, primarily due to the need for a qualified engineer to diagnose and replace the DHW pump if necessary.