LED 5 (B) Low

Ferroli LED 5 (B) Fault Code

Also written as LED5B — same fault.

The Ferroli LED 5 (B) fault code means: your boiler is perfectly fine, it is simply pausing for a few minutes before starting up again to protect its parts.. 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: Waiting time still operating (max. 3 minutes)

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 LED 5 (B) fault code

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

Source

Ferroli LED 5 (B) 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 7 July 2026