Freezer display shows FF and temperature may be too warm or too cold

Safety first: Disconnect power before removing panels or handling wiring.

• Locate the freezer thermistor: In Café freezers, the thermistor is typically behind a small cover on the interior wall near the evaporator or air return vent. Remove the cover to access it.
• Inspect wiring: Check the thermistor leads for cuts, pinches, or signs of moisture damage. Ensure the connector is firmly seated at both the sensor and the main control board.
• Test the thermistor: Disconnect the thermistor and measure its resistance with a multimeter. At around 32°F (0°C), many Café thermistors read approximately 16–20 kΩ (consult model-specific chart if available). A reading of 0 Ω (short) or infinite (open) indicates a bad sensor.
• Replace if faulty: If the thermistor is out of spec, replace it with a Café-compatible freezer thermistor. Route the new sensor wiring along the original path and secure it away from moving parts or sharp edges.
• Check board connection: If the thermistor tests good, inspect the connector at the main control board for corrosion or loose pins. Clean and reseat as needed. Persistent FF with a good sensor may require main control board replacement.