Display shows F70; may occur after PCB replacement or firmware update.

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

Incorrectly configured Ferroli PCB, Wrong parameter set for furnace model, Incompatible display and main board versions

Safety: Turn off power before accessing control boards.

Steps:

Check model and PCB part number: Ensure the installed PCB matches the exact Ferroli model.
Reset to factory (technician only): Some models allow parameter reset via service menu; this should only be done with the Ferroli service manual.

Professional help: Configuration and parameter setting must be performed by a trained technician with access to Ferroli documentation.

Hard 4/5

Main Control Board (PCB)

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