What does the Glow-worm Ultimate F61 fault code mean?
The F61 fault code indicates a malfunction of the domestic hot water (DHW) pump in the Glow-worm Ultimate boiler. This issue can prevent the boiler from effectively heating water for taps and showers.
Common Causes
- Blocked DHW Pump: Debris or limescale buildup can obstruct the pump, leading to operational failure.
- Electrical Fault: A failure in the electrical components or wiring connected to the DHW pump may prevent it from functioning correctly.
Can I fix it myself? (DIY)
It is recommended 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 the DHW pump malfunction is around £250 to £350. This includes the cost of a new pump and labour, as replacing the pump typically requires professional expertise.