What does the Glow-worm Ultimate F76 fault code mean?
The F76 fault code on the Glow-worm Ultimate indicates a fault with the Domestic Hot Water (DHW) PCB, which is responsible for controlling the hot water supply. This error typically suggests a malfunction in the electronic control board that manages the hot water function.
Common Causes
- Faulty DHW PCB: The printed circuit board may have developed a fault due to age or electrical issues.
- Wiring Issues: Damaged or loose wiring connections to the DHW PCB can lead to communication errors and trigger the fault code.
Can I fix it myself? (DIY)
It is highly recommended to call a Gas Safe Engineer for this issue, as it involves electrical components and gas safety. Attempting to fix it yourself could pose safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing the DHW PCB is around £250 to £350, including parts and labour. This cost reflects the complexity of the repair and the need for a qualified technician to ensure safety and compliance with regulations.