How to fix Ideal Logic Plus fault code F78

What does the Ideal Logic Plus F78 fault code mean?

The F78 fault code on the Ideal Logic Plus indicates a problem with energy reporting, which may affect the boiler’s ability to accurately monitor and report its energy consumption. This can lead to inefficiencies in operation and potential issues with heating performance.

Common Causes

  • Faulty Sensor: A malfunctioning energy reporting sensor can lead to incorrect readings and trigger the F78 fault code.
  • Wiring Issues: Damaged or loose wiring connections related to the energy reporting system can disrupt communication and cause faults.

Can I fix it myself? (DIY)

It is recommended to call a Gas Safe Engineer for this issue, as it involves electrical components and safety risks. Attempting to fix it yourself may void warranties or lead to further complications.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for resolving the F78 fault code is around £150 to £250, primarily due to the potential need for sensor replacement and associated labour costs.