6 yellow Low

Ferroli 6 yellow Fault Code

Also written as 6YELLOW — same fault.

The Ferroli 6 yellow fault code means: your boiler has received a request to provide heat and is now attempting to start the internal fan to begin the ignition process.. It appears on 1 Ferroli model in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Demand for heat - fan relay (RL2) will be energised

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Ferroli models that show the 6 yellow fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Ferroli 6 yellow fault code information on this page is sourced and cross-checked against the official Ferroli service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026