High
Heating demand light OFF on Ferroli Falcon

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

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.

What the manual says

Manufacturer manual

Clock or room thermostat not calling

From this model's manual
Verified against the Ferroli/Ferroli Falcon installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

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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All 22 fault codes on the Falcon

Seeing a different code? Every code this model can display, in one place.

4 (Flashing)5 (Flashing)Boiler lock outBottom red lightHeating demand light ONLED 3 OFF (DHW Mode)LED 4LED 4 Flashing (DHW Mode)LED 5 FlashingLED 5 ONLED1LED2LED3LED4 (Permanent)LED4 flashingLED5 (Permanent)Low water pressure light ONRed light (egg timer symbol)Red lockout lightTap symbol light OFFTap symbol light ON

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