Whirlpool W10254428A Manual page 18

FOR SERVICE TECHNICIAN'S USE ONLY
Water Temperature Controls
Heating Element – Test #10
Temperature Sensor – Test #11
TEST #10: Heating Element
This test checks the heating element, wiring,
and CCU.
1. Unplug washer or disconnect power.
2. Remove top panel to access machine
electronics.
3. Disconnect connector HE2 from the CCU.
Refer to CCU diagram on page 12.
4. Using an ohmmeter, measure the resistance
across pins 1 and 2 of connector HE2.
If the resistance is between 10-20 Ω, the
heating element and wiring are good; go
to step 8.
If the resistance is open, go to step 5.
5. Access the heating element.
6. Disconnect the wire connectors from the
heating element.
7. Using an ohmmeter, measure the
resistance across the two heating element
terminals.
If the resistance is between 10-20 Ω, the
heating element is good; replace the lower
main harness.
If the resistance is open, replace the
heating element.
8. If the preceding steps did not correct the
heating element problem, replace the CCU.
Unplug washer or disconnect power.
Replace the CCU.
Reassemble all parts and panels.
Perform the "Quick Diagnostic Test"
on pages 4–5 to verify repair.
Temperature Sensor
Heater Terminal
Figure 13 - Heater & Temperature Sensor
PAGE 18
TEST #11: Temperature Sensor
This test checks the temperature sensor,
wiring, and CCU.
1. Unplug washer or disconnect power.
2. Remove top panel to access machine
electronics.
3. Disconnect connector SET2 from the CCU.
Refer to CCU diagram on page 12.
4. Using an ohmmeter, measure the
resistance across pins 1 and 2 of temperature
sensor connector SET2. The measured
resistance should be within the temperature
range shown in the following table.
Approx. Temperature
If the resistance is within the range shown
in the table, go to step 8.
If the resistance is infinite or close to zero,
go to step 5.
5. Remove the front panel to access the
heating element.
6. Disconnect the temperature sensor
connector from the heating element.
7. Using an ohmmeter, measure the
resistance across pins 1 and 2 of the
temperature sensor (on the heating element).
If the resistance is within the range shown
in the table above, the sensor is good;
replace the lower main harness.
If the resistance is open, replace the
temperature sensor.
8. If the preceding steps did not correct the
temperature sensor problem, replace the CCU.
Unplug washer or disconnect power.
Replace the CCU.
Reassemble all parts and panels.
Heater Terminal
Perform the "Quick Diagnostic Test"
on pages 4–5 to verify repair.
F° C°
32 0
50 10
68 20
86 30
104 40
122 50
140 60
158 70
176 80
194 90
DO NOT REMOVE OR DESTROY
Approx. Resistance
K
35.9
22.8
14.8
9.8
6.6
4.6
3.2
2.3
1.7
1.3