Refrigerator Defrost Cycles

No-Frost / Automatic DefrostFrost-free refrigerators and upright freezers defrost automatically either on a time-based system (Defrost Timer) or usage-based system (Adaptive Defrost). For more information, visit: Refrigerator - Automatic Defrost System

 
The defrost system activates a defrost heater in the evaporator section at the rear of freezer. This heater melts frost off the evaporator coils and then turns off.
  • During defrost there will be no running sounds, no fan noise, and no compressor noise.
  • Most models will defrost for approximately 25 to 45 minutes, usually once to twice a day.
  • You may hear water dripping or sizzling as it hits the heater. This is normal and helps evaporate the water before it gets to the drip pan. 
  • When the defrost heater is on, it is normal to see a red, yellow, or orange glow from the freezer. 

 

Manual Defrost or Partial Automatic Defrost (compact)You must manually defrost by turning off the refrigerator and letting it warm to room temperature. There is not a defrost heater in these models. 

  • Defrost whenever frost becomes 1/4 inch to 1/2 inch thick.
  • Following the instructions in the care and cleaning section of your Owner's Manual. 
  • Fresh food compartment defrosting takes place automatically every time the refrigerator turns off. Melted frost water drains from the cooling coil into trough on rear wall of cabinet, and  then down the corner to a drain tube at bottom. Water flows into a pan behind the grille where it is evaporated.

Cycle DefrostRefrigerator fresh food section defrosts automatically by means of a thermostat affixed to the evaporator coils every time the unit cycles off (every 20-30 minutes); however, the freezer compartment must be manually defrosted whenever frost becomes 1/4 inch to 1/2 inch thick.

  • Fresh food compartment defrosting takes place automatically every time refrigerator turns off. Melted frost water drains from the cooling coil into trough on rear wall of cabinet then down the corner to a drain tube at bottom. Water flows into a pan behind the grille where it is evaporated.

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