What does the Glow-worm Betacom F73 fault code mean?
The F73 fault code indicates a problem with the domestic hot water (DHW) flow rate sensor in the Glow-worm Betacom boiler. This fault typically means that the boiler is unable to detect the flow of hot water, which can lead to issues with hot water delivery.
Common Causes
- Faulty Flow Rate Sensor: The sensor may be malfunctioning or damaged, preventing accurate readings of the water flow.
- Blocked Water Path: Debris or limescale buildup in the water path can obstruct flow, leading to sensor errors.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves gas and electrical components that require professional handling for safety and compliance.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing the flow rate sensor is around £150 to £200. This includes the cost of the part and labour, as sensor replacement typically requires professional expertise.