What does the Glow-worm Ultimate F49 fault code mean?
The F49 fault code on the Glow-worm Ultimate indicates a fault with the Domestic Hot Water (DHW) PCB. This typically suggests an issue with the electronic control board responsible for managing hot water delivery.
Common Causes
- PCB Failure: The printed circuit board may have developed a fault due to age, wear, or electrical issues.
- Wiring Issues: Damaged or loose wiring connections to the PCB can disrupt communication and functionality.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer for this issue, as it involves electrical components and gas safety regulations. 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-£350. This includes the cost of the part and labour, as PCB replacements require professional installation to ensure safety and compliance.