What does the Glow-worm Ultimate F102 fault code mean?
The F102 fault code indicates a domestic hot water (DHW) electrical warning, suggesting that there is an issue with the electrical components responsible for heating the water. This could be due to a fault in the wiring, a malfunctioning sensor, or a problem with the control board.
Common Causes
- Wiring Issues: Damaged or loose wiring connections can disrupt the electrical flow, leading to the F102 fault code.
- Faulty DHW Sensor: A malfunctioning domestic hot water sensor may fail to provide accurate readings, triggering the fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves electrical components that can be dangerous if handled improperly. Attempting DIY repairs could void warranties or lead to further complications.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F102 fault could range from £150 to £300, depending on whether the issue is with wiring or requires replacement of the DHW sensor. This estimate includes labour and parts, reflecting the complexity of electrical repairs.