Display shows dF or "DEF" for extended periods and the freezer temperature rises during this time.

Safety: Unplug the freezer before accessing the control board or defrost components.

Steps to resolve dF / stuck in defrost:

• 1. Allow normal defrost duration: Some New World models briefly display dF during a scheduled defrost. If it persists for more than 30–60 minutes and the compressor does not restart, there is likely a fault.
• 2. Power reset: Unplug the freezer for 10–15 minutes, then reconnect. If dF reappears and the compressor remains off, continue diagnosis.
• 3. Check defrost sensor: Inspect and test the defrost NTC sensor or thermostat. If it falsely reports low temperature, the PCB may keep the heater on or prevent exit from defrost.
• 4. Inspect PCB and relay: Access the main control PCB and look for a defrost relay stuck closed (signs of overheating or melted plastic). If suspected, the PCB must be replaced.
• 5. Verify heater operation: Ensure the defrost heater is not energized continuously (only test with proper electrical safety and, ideally, a technician).

Warning: A heater stuck on can overheat the cabinet and damage plastic parts. If you smell burning or feel excessive heat, disconnect power immediately and seek professional service.