Ambient Thermistor; Interior Lights - Electrolux Built-in 42" Service Manual

The AC switch, above the freezer door, controls the freezer
interior lights and the auger motor operation. The freezer
light is switched through the neutral side of the line.
The AC switch, above the fresh food door, controls the
fresh food interior lights.
The DC switches provide "door open" information to the
power control board (PCB).
Note: The fans turn off when the doors are opened (DC
door switches control operation) and delay 10 seconds
before restarting when the doors are closed again. The
freezer door switch controls only the freezer fan. The
fresh food door switch controls both the fresh food and
freezer fan operation.

Interior Lights

Both the fresh food and freezer interior lights use 120
VAC, 40-watt incandescent bulbs. There are 4 bulbs (160
watts) in the fresh food section, and 2 bulbs (80 watts) in
the freezer section.
Freezer bulb voltage is checked at CN07 on the terminal
block. Test for voltage between pin #9 and pin #10.
Note: Pin #10 is only at neutral when the freezer door AC
switch has closed contacts (door open). Fresh food bulb
voltage is checked at CN09 on the terminal block. Test for
voltage between pin #4 (neutral) and pin #3.
Note: Pin #3 is only at line voltage (120 VAC) when the
fresh food AC door switch has closed contacts (door
open).
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WARNING: The center terminal of the freezer light
socket is energized whenever the refrigerator is plugged
in and the main switch is closed, regardless of door
position.
Thermistors
The main control board uses input from 5
thermistors:
• Ambient
• Freezer
• Fresh Food
• Freezer Evaporator
• Fresh Food Evaporator
The thermistors have a negative coeffi cient.
As the temperature increases, the thermistor's
resistance decreases.
Testing
The most accurate
method of testing a
thermistor is to place it
in a glass of ice water
for several minutes. The
thermistor should read
approximately 13K W
in the glass of 33°F ice
water.
Note: Thermistors can also be checked for an open or
shorted condition by using the diagnostic mode (see
Service Diagnostics).

Ambient Thermistor

The ambient thermistor measures room temperature and is
clipped to the back of the dispenser cover. Check for
thermistor resistance (see Thermistor Chart) by
disconnecting the harness at CN03 and testing between
pin #4 (gray wire) and pin #6 (red wire) on the harness.
Freezer Air Thermistor
The freezer air thermistor is clipped to the inside of the
evaporator cover.
Check for thermistor resistance (see ThermistorChart) by
disconnecting the harness at CN06 and testing between
pin #3 (gray wire) and pin #5 (brown wire) on the
harness.
Fresh Food Air Thermistor
The fresh food air thermistor is clipped to the inside of
the ceiling cover. Check for thermistor resistance (see
Thermistor Chart) by disconnecting the harness at CN05
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