F16
Ferroli Non‑Volatile Memory (EEPROM/Flash) Error

Thermostat shows F16 and the heating schedule cannot be saved or is lost after reboot.

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Safety Warning

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.

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Possible Causes

Corrupted configuration memory, Excessive write cycles to EEPROM, Firmware bug in schedule storage routine, Power loss during configuration save

How to Fix / Troubleshooting

Safety first: Low‑voltage only.

  • Factory reset:
    • Perform a full factory reset of the thermostat.
    • Re‑enter schedules and settings.
  • Avoid rapid changes:
    • After editing schedules, wait a few seconds before cutting power to allow proper saving.
  • Update firmware:
    • Check for and install any firmware updates that may fix memory handling.
  • If F16 persists:
    • The internal memory chip is likely failing.
    • Replace the Ferroli smart thermostat main unit.
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Repair Difficulty

Medium 3/5

Required Part

Ferroli Smart Thermostat Main PCB (Memory)
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