BoilerFaultCodesFerroli F10 Fault Code
The Ferroli F10 fault code means: your boiler's internal sensor has stopped correctly monitoring the water temperature as it leaves the unit, preventing it from heating up properly.. It appears on 19 Ferroli models in our database.
Technical description: Flow sensor error
What causes the Ferroli F10 fault?
This fault occurs when the boiler's internal thermometer, which measures the water temperature as it leaves the unit, sends an incorrect or missing signal to the control board. The most common reason is that the sensor has physically failed due to age or wear, though loose or damaged electrical wiring can also prevent the sensor from communicating correctly.
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 F10 fault code
Click a model for the full fault code list and model-specific repair notes.
- Arena 30A Repair: £150-250
- Atlas D Repair: £120-220
- Bluehelix HiTech RRT Repair: £90-180
- Bluehelix Pro RRT Repair: £150-250
- Bluehelix Tech Repair: £90-180
- Bluehelix Tech RRT Repair: £150-250
- Bluehelix Tech RRT 24C Repair: £150-250
- Domiproject Repair: £90-160
- Energy Top B Repair: £150-250
- Extrema C Repair: £120-220
- Force W Repair: £120-200
- i25 Repair: £120-220
- i29 Repair: £120-220
- Leb TS Repair: £120-220
- Maxima 35 S Repair: £150-300
- Modena HE Repair: £100-180
- Optima 201 Repair: £180-350
- Optimax Repair: £200-400
- Optimax 25 C Repair: £150-300
Source
Ferroli F10 fault code information on this page is sourced and cross-checked against the official Ferroli service / installation manuals for each affected model.
- Ferroli Arena 30A manual (PDF)
- Ferroli Atlas D manual (PDF)
- Ferroli Bluehelix HiTech RRT manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026