Display shows dF or DF periodically; unit may pause cooling briefly.

Note: On many Costway digital freezers, dF/DF simply indicates that the unit is in an automatic defrost cycle and is not an error.

What to do:

• Observe behavior: During dF, the compressor and interior fan may stop while the defrost heater operates. This can last 15–30 minutes.
• Check temperature: The interior temperature may rise slightly but should return to normal once the cycle completes.
• Do not unplug: Allow the defrost cycle to complete. Interrupting it repeatedly can lead to frost buildup.
• Investigate only if: dF remains on the display continuously for several hours, or the freezer warms excessively. In that case, inspect the defrost sensor and heater as described in E2/E4 entries.

Safety: No action is required for normal dF indication. Only open panels with the unit unplugged if you suspect a defrost malfunction.