How to fix Glow-worm Betacom fault code F75

What does the Glow-worm Betacom F75 fault code mean?

The F75 fault code indicates a fault with the domestic hot water (DHW) pressure sensor in the Glow-worm Betacom boiler. This issue can prevent the boiler from properly regulating water pressure, affecting hot water delivery.

Common Causes

  • Blocked Pressure Sensor: Debris or mineral build-up can obstruct the pressure sensor, leading to inaccurate readings.
  • Wiring Issues: Damaged or loose wiring connections to the pressure sensor can disrupt its functionality, triggering the fault code.

Can I fix it myself? (DIY)

While some homeowners may attempt to clean the pressure sensor, it is highly recommended to call a Gas Safe Engineer for any repairs involving gas or electrical components to ensure safety and compliance with regulations.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for the F75 fault, including parts and labour, is around £150-£200. This includes the replacement of the pressure sensor and any necessary wiring repairs.