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Defrost Heater
The defrost heater is a single-tube, radiant
heater. It is held in place by 2 tabs on the
evaporator (1 on each side) and by 2 ceramic
and wire supports.
The ceramic and wire supports prevent the
heater from sagging and touching the metal
drain pan if the glass is broken.
Heater Supports
Defrost Drain Probe
Evaporator Thermistor
The evaporator thermistor is mounted on the
upper right side of the evaporator. The defrost
cycle will terminate when the main control board
detects 65°F from the evaporator thermistor.
The main control board must sense 65°F in less
than 45 minutes, or the defrost cycle will time
out. Normal defrost time is 25 minutes or less,
not including the 5-minute dwell or post dwell
periods.
Defrost Overtemperature Thermostat
The defrost overtemperature thermostat
(bimetal switch) is mounted on the evaporator
and provides overtemperature protection during
defrost. This thermostat will open at 140°F and
will close at 110°F.
Note:
The main control board will not know if
the heater does not come on due to a broken
heater, open defrost overtemperature
thermostat, or an open wiring harness. The
defrost heater is controlled by maximum time on
the main control board or temperature at the
evaporator thermistor.
Defrost Heater Supports
Defrost Overtemperature Thermostat
Evaporator Thermistor
Summary of Contents for GTRS0 Series
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Page 7: ...5 MODEL NOMENCLATURE Model series GTRS0 GTRC0 GTRL0 MTRL0 20 cubic foot refrigerators...
Page 11: ...9...
Page 14: ...12 REMOVE FRESH FOOD DOOR LOWER HINGE WITH 5 16 SOCKET SCREWDRIVER REMOVE TWO NUTS...
Page 34: ...20 EXPLODED VIEWS Knob Electro mechanical EX PL OD ED VIE WS...
Page 35: ...21 Knob Electronic...
Page 36: ...22 structure...
Page 37: ...23 FREEZER DOOR FRESHFOOD DOOR...
Page 38: ...24 HINGE...
Page 39: ...25 RACKS SPILLPROOF...
Page 51: ...37 Schematic Knob Electro mechanical...
Page 54: ...40 COMPONENT AND CONNECTOR LOCATOR VIEWS...
Page 55: ...41 Relay and Overload Under Cover Compressor Dryer No Clean Condenser Capacitor Condenser Fan...