F10 displayed, water temperature overshoots setpoint, then unit locks out.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Incorrect NTC readings, Sticking gas valve, PCB control error, Poor water flow

Safety: Risk of scalding—allow water to cool before working.

1. Verify set temperature: Ensure the user setpoint on the Ferroli panel is reasonable (e.g., 50–60°C).
2. Check flow rate: Very low flow can cause overshoot. Clean aerators and filters.
3. Sensor check: Test and replace suspect NTC sensors as needed.
4. Technician tasks: A professional should verify gas valve modulation and PCB control; replace faulty components.

Hard 4/5

Main Control PCB

Check Price on Amazon

We may earn a commission from links on this page.