Component Testing
Before testing any of the components, perform the following checks:
•
Control failure can be the result of corrosion on connectors. Therefore, disconnecting and
reconnecting wires will be necessary throughout test procedures.
•
All tests/checks should be made with a VOM or DVM having a sensitivity of 20,000 ohms per- volt
DC, or greater.
•
Check all connections before replacing components, looking for broken or loose wires, failed
terminals, or wires not pressed into connectors far enough.
•
Resistance checks must be made with power cord unplugged from outlet, and with wiring harness
or connectors disconnected.
Thermistor
Sensor Temperature °F
Resistance Range
W
32
29,000 to 31,000
75
9,500 to 10,500
1. Unplug ice maker or disconnect power.
2. Set the ohmmeter to the appropriate scale.
3. For the most accurate measurement, immerse
the thermistor in ice water for 5 minutes, then use
the 32°F reading in the chart.
4. Touch the ohmmeter test leads to the two
evaporator thermistor connectors. The meter
should indicate as shown in the chart.
Cutter Grid
1.
Unplug ice maker or disconnect power.
2. Set the ohmmeter to the appropriate scale.
3. Touch the ohmmeter test leads to the pins of the
cutter grid 2-wire connector. The meter should
indicate 4 to 5 ohms
Transformer
1.
Unplug ice maker or disconnect power.
2. Set the ohmmeter to the appropriate scale.
3. Touch the ohmmeter test leads to the primary
black and white leads of the dual transformer. The
meter should indicate between 3.5 and 4.5 ohms.
4. Touch the ohmmeter test leads to the secondary
yellow and yellow leads of the dual transformer.
The meter should indicate between 0.11 and 0.14
ohms.
5. Touch the ohmmeter test leads to the secondary
red and red leads of the dual transformer. The
meter should indicate between 0.14 and 0.18
ohms.
Water Pump
1. Unplug ice maker or disconnect power.
2. Set the ohmmeter to the appropriate scale.
3. Touch the ohmmeter test leads to the outside
water pump wire connector pins. The meter should
indicate approximately 3.6 ohms.
Reservoir Drain Pump
1.
Unplug ice maker or disconnect power.
2. Set the ohmmeter to the appropriate scale.
3. Touch the ohmmeter test leads to the outside
reservoir drain pump wire connector pins. The
meter should indicate approximately 3.6 ohms.
July 2007
Page 13
CS0415
Service Manual
Electrical Shock Hazard
Electrical shock can
cause personal injury.
Disconnect electrical
power before proceeding.
