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Fresh Food Evaporator Thermistor
The fresh food evaporator thermistor (part #
WR55X10025) is located in an aluminum thermal
block on the back of the evaporator. It is attached
to the fresh food evaporator by a wire tie. (See
Fresh
Food Evaporator
for accessing instructions.)
If the fresh food evaporator thermistor is either open
or shorted,
the main control board defaults to a
fi xed defrost cycle of 1 hour at high-speed fan.
Thermal Block
Barbs on the molded housing hold the thermistor in
the thermal block.
Replacement
Should a thermistor require replacement, use
plastic bell connectors (part # WR01X10466). Fill
the connector with RTV102 silicone, then splice a
new thermistor into the harness as shown in the
illustration.
Barbs
Thermistor
Insert the new thermistor into the thermal block.
Add RTV102 silicone to hold the thermistor in place.
Make certain to wire tie the thermal block back to
the evaporator.
RTV102
Defrost Cycles
Fresh Food Evaporator Defrost Cycle
The refrigerator utilizes a forced air cycle defrost
method (no electric heater) to remove frost from the
fresh food evaporator. Fresh food air that is above
freezing temperature circulates thru the coil and
melts any accumulated frost. Note that during fresh
food defrost, the compressor may still be running,
cooling only the freezer section.
Fresh Food Normal Defrost
The fresh food section cools until the fresh food
thermistor is satisfi ed.
Thermistor
If both freezer and fresh food thermistors are
satisfi ed, the compressor cycles off. If the freezer
still requires cooling, the main control board rotates
the 3-way valve to stop refrigerant fl ow to the fresh
food evaporator. Even though refrigerant fl ow has
stopped in the fresh food evaporator, the fresh food
fan continues to run at low speed.
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