BoilerFaultCodesIdeal H6 Fault Code
The Ideal H6 fault code means: your boiler has stopped working because the internal fan, which safely exhausts gases from the unit, is not spinning correctly.. It appears on 1 Ideal model in our database.
Technical description: Fan Error
What causes the Ideal H6 fault?
This fault occurs when the boiler's control system detects that the internal fan is either not spinning at all or is spinning at the wrong speed to safely remove exhaust gases. The most common reasons are a mechanical failure within the fan motor itself, a loose connection in the wiring, or the electronic circuit board failing to send the correct signals to the fan.
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 H6 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal H6 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