BoilerFaultCodesIdeal 6A Fault Code
The Ideal 6A fault code means: your boiler is failing to light the gas flame properly, meaning it cannot heat your water or radiators.. It appears on 1 Ideal model in our database.
Technical description: No ionisation after ignition phase, defective igniter / fan is not rotating / igniter and fan are functioning.
What causes the Ideal 6A fault?
This fault occurs when the boiler's control system tries to start the burner but cannot detect a stable flame. It is usually caused by a blockage in the burners, a worn-out ignition spark, or a failed sensor that cannot 'see' the fire once it has lit. In some cases, it may also happen because the internal fan isn't spinning fast enough to clear out old gases and allow fresh air in for combustion.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Ideal models that show the 6A fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal 6A fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026