How much does it cost to fix Ferroli error code RY4 Not Energised?

Typical repair cost for the Ferroli RY4 Not Energised fault is £120-250 including labour.

RY4 Not Energised High

Ferroli RY4 Not Energised Fault Code

Q: What does the Ferroli RY4 Not Energised fault code mean?

Your boiler is failing to start because it cannot confirm that the air circulation inside is safe, causing it to lock itself to prevent an unsafe condition.

Also written as RY4NOTENERGISED — same fault.

The Ferroli RY4 Not Energised fault code means: your boiler is failing to start because it cannot confirm that the air circulation inside is safe, causing it to lock itself to prevent an unsafe condition.. It appears on 4 Ferroli models in our database.

Technical description: Air pressure switch (43) not in NC position or miswired

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 RY4 Not Energised fault code

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

Source

Ferroli RY4 Not Energised 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