How much does it cost to fix Ferroli error code E41?

Typical repair cost for the Ferroli E41 fault is £120-200 including labour.

E41 High

Ferroli E41 Fault Code

Q: What does the Ferroli E41 fault code mean?

Your boiler has lost the ability to measure the temperature of your hot water, which means it will stop providing hot water until the faulty sensor is replaced.

The Ferroli E41 fault code means: your boiler has lost the ability to measure the temperature of your hot water, which means it will stop providing hot water until the faulty sensor is replaced.. It appears on 1 Ferroli model in our database.

Technical description: DHW sensor fault (short/open circuit)

Typical repair cost £120-200 (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 E41 fault code

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

Maxima 35 S Repair: £120-200

Source

Ferroli E41 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