GE PSB42LSRBV Manual page 78

 If either evaporator thermistor fails (open or shorted), the power control board (PCB)
defaults to a timed defrost cycle based on cabinet temperature.
 If the freezer evaporator thermistor fails (open or shorted) & the freezer temperature  If th f
is below 27°F (-3°C), the freezer defrost heater will be energized for 20 minutes.
 If the freezer temperature is above 27°F (-3°C), the heater will not come on.
 If the fresh food evaporator thermistor fails (open or shorted) & the fresh food
temperature is below 68°F (20°C), the fresh food defrost heater will be energized for
10 minutes.
 If the fresh food temperature is above 68°F (20°C), the heater will not come on.
 During thermistor error operation, the control defaults to fresh food defrost every 5
hrs. & freezer defrost every 10 hours of accumulated compressor run time.
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Thermistor Error Defrost Operation
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GE Profile 42-48 Refrigerators (4/1/05)
GE CONFIDENTIAL & PROPREITARY INFORMATION - NOT FOR PUBLIC DISCLOSURE
Copyright 2007 General Electric Company – 12/14/2009
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