F12
Ferroli
Display / LCD Module Fault
Thermostat shows F12 and the display is unreadable or segments are missing.
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Possible Causes
Damaged LCD ribbon connector, Physical impact to thermostat front, Manufacturing defect in display module, Excessive heat or UV exposure degrading LCD
How to Fix / Troubleshooting
Safety first: Low‑voltage only.
- Power reset:
- Remove power or batteries for 1–2 minutes and restart.
- Check mounting location:
- Ensure the thermostat is not in direct sunlight or above a heat source.
- Inspect for physical damage:
- If the front glass is cracked or the unit has been dropped, the display is likely irreparable.
- Replace unit:
- Order a replacement Ferroli smart thermostat display unit and pair it with the existing receiver.
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Repair Difficulty
Easy
2/5
Required Part
Ferroli Smart Thermostat Display Module
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