dF error code indicating defrost sensor or defrost cycle fault on Café refrigerator.

Safety first: Disconnect power before accessing the evaporator compartment or control board.

• 1. Access the evaporator area: Remove freezer drawers and the rear panel to locate the defrost thermistor (usually clipped to the evaporator tubing).
• 2. Inspect the thermistor: Ensure it is firmly clipped to the tubing and not hanging loose. A loose sensor can misread temperature.
• 3. Check the connector: Follow the thermistor wires to the connector. Verify it is fully seated and free of corrosion or moisture.
• 4. Test resistance: With a multimeter, measure thermistor resistance at a known temperature (e.g., in ice water at 32°F/0°C). Compare to Café/GE thermistor specifications. A reading far out of range indicates a bad sensor.
• 5. Replace thermistor if faulty: Cut and splice using approved connectors or plug in the new sensor if it uses a direct connector. Secure it back to the evaporator tubing.
• 6. Clear the code: Restore power and allow the unit to run through a defrost cycle. The code should clear automatically if the sensor is now reading correctly.