How much does it cost to fix Ferroli error code 35?

Typical repair cost for the Ferroli 35 fault is £90-180 including labour.

35 Low

Ferroli 35 Fault Code

Q: What does the Ferroli 35 fault code mean?

Your boiler has detected a temporary issue and stopped working as a safety precaution, but it should restart itself automatically once the internal temperature or pressure returns to normal.

The Ferroli 35 fault code means: your boiler has detected a temporary issue and stopped working as a safety precaution, but it should restart itself automatically once the internal temperature or pressure returns to normal.. It appears on 3 Ferroli models in our database.

Technical description: Temporary shutdown fault - resets automatically as soon as the value comes back within the boiler’s normal working range

Typical repair cost £90-180 (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 35 fault code

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

Source

Ferroli 35 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