Display shows dF or DF and the unit may be stuck in defrost or not defrosting correctly.

Safety: Unplug the refrigerator before accessing internal panels or the rear control area.

Steps:

• 1. Observe behavior: If the unit remains warm and the compressor does not run for long periods, it may be stuck in defrost. If the evaporator is heavily iced, defrost may not be completing.
• 2. Manually defrost: Power off, open doors, and allow the unit to defrost fully (several hours). Protect the floor with towels.
• 3. Check defrost components: Access the evaporator and test the CDA defrost heater and defrost thermostat/NTC for continuity and correct resistance.
• 4. Inspect wiring: Look for burnt connectors or broken wires between the heater, sensor, and PCB.
• 5. Replace faulty parts: Replace any open-circuit heater or defective thermostat/sensor. Reassemble and restore power.
• 6. PCB logic: If dF returns and components test OK, the defrost control on the main PCB may be faulty and should be replaced by a technician.

Warning: Do not bypass safety thermostats or fuses; they prevent overheating and fire risk.