How much does it cost to fix Ferroli error code F50?

Typical repair cost for the Ferroli F50 fault is £150-300 including labour.

F50 High

Ferroli F50 Fault Code

Q: What does the Ferroli F50 fault code mean?

Your boiler has detected a problem with the internal mechanism that controls the gas supply, meaning it has safely shut itself down to prevent unsafe operation.

The Ferroli F50 fault code means: your boiler has detected a problem with the internal mechanism that controls the gas supply, meaning it has safely shut itself down to prevent unsafe operation.. It appears on 6 Ferroli models in our database.

Technical description: Modulating gas valve fault

Typical repair cost £150-300 (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 F50 fault code

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

Arena 30A Repair: £150-300
Domi Compact Repair: £120-250
Domiproject Repair: £250-£450
Econcept 100 Repair: £180-300
iBoiler 24 Repair: £250-£400
iBoiler 28 Repair: £250-£400

Source

Ferroli F50 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