High
LED 3 (B) on Ferroli Hawk II

Your boiler is currently idle because it is not receiving a signal from your thermostat or timer to start heating.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Roomstat (72) or clock (62) not calling for heat

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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