BoilerFaultCodesIdeal 15 Fault Code
The Ideal 15 fault code means: your boiler has detected an internal error preventing it from operating, which usually indicates an issue with the main control board or communication between internal parts.. It appears on 7 Ideal models in our database.
Technical description: General fault code
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 15 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal 15 fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.
- Ideal Classic SE15P FF manual (PDF)
- Ideal Concord CXC 48 116 manual (PDF)
- Ideal Icos System manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026