Freezer displays F03 and may show incorrect internal temperature or cycle erratically.

Safety first: Disconnect the appliance from mains before removing covers.

Locate the cabinet sensor:

• The cabinet or air NTC is usually located behind a small plastic cover or grille on the inner wall of the freezer compartment.
• Remove the cover to expose the sensor probe and connector.

Inspection and testing:

• Check for frost buildup or water droplets around the sensor. Gently defrost with a hairdryer on low setting, keeping it at a safe distance to avoid melting plastic.
• Unplug the sensor connector and inspect for corrosion or loose pins.
• Measure resistance of the sensor at a known temperature (e.g., room temperature if the freezer has been off). Compare with typical NTC values or service documentation if available.

Repair steps:

• If resistance is out of range (open or short), replace the cabinet NTC sensor with the correct Indesit spare.
• Clean and dry the connector, then reconnect firmly.
• Ensure the sensor is clipped back in its original position so it measures air temperature correctly, not touching the evaporator directly.