A LED 1 High

Ferroli A LED 1 Fault Code

Also written as ALED1 — same fault.

The Ferroli A LED 1 fault code means: your boiler has lost all power and is effectively switched off, preventing it from heating your home or water.. It appears on 2 Ferroli models in our database.

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: No mains electricity/switches off/fuse blown.
Typical repair cost £80-200 (including labour)

DIY fix possible

Check that the main boiler isolation switch (usually a fused spur nearby) is turned on.Inspect your home's consumer unit (fuse box) to see if a trip switch or RCD has flicked to the off position.Check if the fuse within the boiler's local connection unit has blown and replace it if necessary.

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Ferroli models that show the A LED 1 fault code

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

Source

Ferroli A LED 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