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Defrost Cycle
Fresh Food Defrost Cycle
The refrigerator evaporator utilizes an adaptive
defrost cycle that operates a metal sheath heater to
remove frost from the evaporator.
If the main board senses any door opening, the
defrost cycle is every 12 hours. Otherwise, the
defrost cycle is 16 hours.
The control board determines the length of time
the heater is energized. It does this by monitoring
the fresh food evaporator thermistor. Once the
temperature of the thermistor reaches 54°F
(12°C), the control cycles the defrost heater off.
A bimetal safety thermostat provides a backup
in the event the evaporator thermistor fails. The
safety thermostat prevents the temperature from
exceeding 140°F (60°C).
Freezer Defrost Cycle
The freezer evaporator utilizes an adaptive defrost
cycle that operates a metal sheath heater to
remove frost from the evaporator.
If the main board senses any door opening, the
defrost cycle is every 12 hours. Otherwise, the
defrost cycle is 16 hours.
The control board determines the length of time the
heater is energized. It does this by monitoring the
freezer evaporator thermistor. Once the temperature
of the thermistor reaches 50°F (10°C), the control
cycles the defrost heater off. A bimetal safety
thermostat provides a backup in the event the
evaporator thermistor fails. The safety thermostat
prevents the temperature from exceeding 140°F
(60°C).
Dispenser Lock
When the dispenser system is locked, actual and
set temperatures can be viewed but no dispenser
command will be accepted. This includes the
dispenser cradle and will prevent accidental
dispensing that may be caused by children or pets.
If a pad or the cradle is depressed with the system
locked, it will not be acknowledged.
Light Time-Out Function
The refrigerator incorporates a light time-out
function for the fresh food and freezer sections. If
either of the fresh food doors or the freezer drawer
is left open for 10 minutes, the main control board
will turn off the lights in that section. If the open
door or drawer is closed, and then reopened, the
timer in the main control board will reset for another
10 minute count.
