What does the Ideal Logic Plus F91 fault code mean?
The F91 fault code on the Ideal Logic Plus indicates a problem with the energy management system, which may affect the boiler’s ability to operate efficiently. This fault typically suggests that the boiler is unable to communicate properly with its internal components.
Common Causes
- Faulty PCB: A malfunctioning printed circuit board can disrupt the energy management system’s operations.
- Wiring Issues: Damaged or loose wiring connections can lead to communication failures within the boiler.
Can I fix it myself? (DIY)
It is highly recommended to call a Gas Safe Engineer for this issue, as it involves electrical components that can be dangerous if mishandled. Attempting DIY repairs could void your warranty or lead to further damage.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F91 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.