How to fix Ideal Logic Plus fault code F90

What does the Ideal Logic Plus F90 fault code mean?

The F90 fault code on the Ideal Logic Plus indicates a problem with the boiler’s energy initiatives, which can affect its efficiency and operation. This fault typically suggests that the boiler is unable to communicate effectively with its energy management system.

Common Causes

  • Faulty PCB: The printed circuit board may be malfunctioning, leading to communication issues within the boiler.
  • Wiring Issues: Damaged or loose wiring connections can disrupt signals between components, causing the F90 fault.

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 could lead to further damage or safety hazards.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for resolving the F90 fault code is around £200 to £300, primarily due to the potential need for a new PCB or extensive wiring repairs, which can be labour-intensive.