What does the Glow-worm Betacom F74 fault code mean?
The F74 fault code on the Glow-worm Betacom indicates a problem with the central heating flow rate sensor. This sensor is crucial for monitoring the flow of water through the heating system, and its failure can lead to inefficient heating or system shutdown.
Common Causes
- Blocked or Dirty Sensor: Accumulation of debris or limescale can obstruct the sensor, affecting its performance.
- Electrical Connection Issues: Loose or damaged wiring can disrupt the sensor’s signal, leading to erroneous readings.
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. Attempting DIY repairs could pose safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for the F74 fault, including parts and labour, is around £150. This includes replacing the flow rate sensor and any necessary electrical repairs.