BoilerFaultCodesIdeal F 09 Fault Code
Also written as F09 — same fault.
The Ideal F 09 fault code means: your boiler's internal computer brain is confused or having trouble talking to the gas components, meaning it has shut down for safety.. It appears on 4 Ideal models in our database.
Technical description: Unconfigured/faulty PCB or gas valve short circuit (soft fault)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Ideal models that show the F 09 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal F 09 fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.
- Ideal i-mini2 C24 manual (PDF)
- Ideal Independent System2 S15 manual (PDF)
- Ideal Logic Max Combi 2 manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026