ER 1 High

Ferroli ER 1 Fault Code

Also written as ER1 — same fault.

The Ferroli ER 1 fault code means: your boiler is trying to start but cannot light the internal flame, which means it has safely shut down to prevent gas from building up.. It appears on 1 Ferroli model 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: IGNITION PROBLEM - No gas, Defective gas valve, Clogged injectors, Gas pressure too low, No spark between electrodes during ignition phase
Typical repair cost £120-250 (including labour)

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 ER 1 fault code

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

Source

Ferroli ER 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 7 July 2026