F4 has two meanings, by model: ice maker sensor (36 inch) or freezer sensor (24 inch).
Model compatibility: Bertazzoni reuses codes across series and model years, so F4 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
F4 is an ice maker sensor failure in the REF36FDFZXNT manual and a freezer compartment sensor fault in the 24 inch bottom-mount manuals.
Your refrigerator’s model decides what F4 means.
Model
F4 stands for
Manual guidance
36 inch REF36FDFZXNT
The ice maker sensor has failed
No cause or owner step listed
24 inch bottom-mount (REF24BMBPNB, REF24BMFIXNV / RBM24F4FXNV, REF24BMBIPNV)
Freezer compartment sensor
Still cools; call a professional service engineer
On the 36 inch unit
The code belongs to the ice maker group. Whenever the panel is locked, faults show in the temperature display zone, and several at once take turns along with a chime that any button silences.
On the 24 inch unit
The freezer compartment sensor reports the freezer’s temperature; it is a different part from the ice maker sensor. Cooling carries on, though an engineer should take a look.
Which applies to you
Built-in ice maker and a 36 inch width: the first meaning.
24 inch bottom-mount whose manual lacks the ice maker codes: the second.
Still unsure: the nameplate model number settles it.
Common to both
No reset is published. Leave the ice maker and the freezer liner assembled, and write down any other codes that appear next to F4.
Related codes
E2: freezer compartment temperature sensor on 36 inch models
For refrigerator sensor repair in Los Angeles, call (310) 987-4514. Say how wide the refrigerator is and read the model number from the nameplate. The refrigerator repair page has further details.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your Bertazzoni appliance?
Book a specialist visit for a clear estimate and approval before any repair.
Cooling loss is a symptom, not a diagnosis. A useful refrigerator visit separates airflow, defrost, sensing, door sealing and sealed-system faults before…
