BoilerFaultCodesIdeal 16 Fault Code
The Ideal 16 fault code means: your boiler's main control computer has detected a serious internal processing error and has shut down to prevent unsafe operation.. It appears on 5 Ideal models in our database.
Technical description: internal failure - electronic
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 16 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal 16 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 Logic Max Heat 2 manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026