How much does it cost to fix Ferroli error code LED 2: 1?

Typical repair cost for the Ferroli LED 2: 1 fault is £90-160 including labour.

LED 2: 1 Medium

Ferroli LED 2: 1 Fault Code

Q: What does the Ferroli LED 2: 1 fault code mean?

Your boiler thinks a hot water tap is turned on even when all taps are closed, which may prevent your central heating from working.

Also written as LED21 — same fault.

The Ferroli LED 2: 1 fault code means: your boiler thinks a hot water tap is turned on even when all taps are closed, which may prevent your central heating from working.. It appears on 2 Ferroli models in our database.

Technical description: Hot water tap open - D.H.W. flowmeter (136) contact closed

Typical repair cost £90-160 (including labour)

DIY fix possible

Check all hot water taps in the house are fully closedEnsure there are no dripping taps or leaking hot water pipesTurn the boiler power off and back on again to reset the sensor

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Ferroli models that show the LED 2: 1 fault code

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

Source

Ferroli LED 2: 1 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