Display alternates to show dF and cooling may pause periodically.

Note: On many Whynter wine coolers, 'dF' simply indicates that the unit is in a defrost cycle and is not an error.

What to do:

• Observe duration: A normal defrost cycle may last 15–30 minutes. If 'dF' clears and cooling resumes, no action is needed.
• Check for excessive frost: If 'dF' remains for hours and the cabinet warms, unplug the unit, remove interior panels, and inspect the evaporator for heavy ice buildup.
• Manual defrost: Allow the unit to fully defrost with the door open. Do not use sharp tools to chip ice; use towels to catch meltwater.
• Inspect defrost sensor: If the unit frequently stays in defrost too long, test and replace the defrost thermistor as needed.

Call a technician if the unit remains stuck in defrost or never enters defrost, as the control board or defrost heater circuit may be faulty.