The display alternates between temperature and dF; the unit may pause cooling periodically.

Safety: No immediate hazard; this is often a normal indication. Unplug the unit before removing panels.

Steps:

• Observe duration: If dF appears briefly and then returns to the normal temperature display, it is likely a standard defrost cycle and requires no repair.
• Check for frost: If dF remains for hours and cooling is poor, inspect the evaporator area for heavy ice buildup. Defrost manually by unplugging the unit and leaving the door open until all ice melts.
• Inspect defrost sensor: Verify that the evaporator sensor is correctly attached to the coil and that the wiring is intact.
• Monitor after reset: After a full manual defrost and restart, if dF still persists abnormally, the control board or sensor may be faulty and should be tested or replaced.

Warning: Do not chip ice with sharp tools; you can puncture refrigerant lines.