Freezer Defrost Heater Testing
The freezer defrost, suction line drain trough, & evap drain pan/drain tube heaters
are in a parallel circuit.
The heaters are in series with a bi-metal defrost safety thermostat.
Ch
k f
bi
d
i t
f 38
t t
i
l bl
k CN07 b t
i 1 & i
Check for a combined resistance of 38
at terminal block CN07 between pin 1 & pin
2 (when defrost safety thermostat is closed).
Check for 120VAC at terminal block CN07 between pin 1 & pin 2 when the freezer is
in defrost mode.
o
o
The defrost safety thermostat opens @ 140
o
F & resets @ 104
o
F
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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g
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