Display shows dF and cooling pauses periodically while fans may stop

Safety first: No disassembly is required for basic checks. If you open panels, unplug the unit first.

Steps:

• Allow cycle to complete: dF often indicates a normal defrost cycle. Wait 20–40 minutes to see if the code clears and cooling resumes.
• Check door usage: Excessive door openings can cause frost buildup, leading to longer defrost cycles. Reduce door openings and ensure the door seals properly.
• Inspect for heavy frost: If dF persists for hours and cooling is poor, unplug the unit, remove the inner rear panel, and check for thick ice on the evaporator. Manually defrost if necessary.

Repair: If the unit remains stuck in defrost or repeatedly shows dF with poor cooling, test and replace the defrost sensor or thermostat as needed. Persistent issues may require main control board replacement.