Whirlpool WTW5840BW0 Guide page 17

FOR SERVICE TECHNICIAN'S USE ONLY
TEST #5: Temperature Thermistor
This test checks valves, main control,
temperature thermistor, and wiring.
1. Check the cold valve by performing Cold
Valve test under Manual Test Mode on page 9.
 If cold water is being dispensed, proceed
to step 2.
 If hot water is being dispensed, verify
proper hose connection.
2. Check the hot valve by performing Hot
Valve test under Manual Test Mode on page 9.
 If hot water is being dispensed, proceed
to step 3.
 If cold water is being dispensed, ensure
that household hot water is present.
3. Unplug washer or disconnect power.
4. Remove console to access main control.
5. Remove connector J3 from the main
control. With an ohmmeter, measure the
resistance of the temperature thermistor
between pins J3-9 and J3-10. Verify that the
approximate resistance, shown in the table
below, is within ambient temperature range.
THERMISTOR RESISTANCE
Approx. Temperature
F° C°
32 0
41 5
50 10
59 15
68 20
77 25
86 30
95 35
104 40
113 45
122 50
131 55
140 60
149 65
 If the resistance is within the range shown
in the table, go to step 6.
 If the resistance is infinite or close to zero,
replace the temperature thermistor assembly.
NOTE: Most thermistor errors are a result
of the resistor being out of range. If the
temperature thermistor malfunctions, the
washer will default to pre-programmed
wash settings.
6. If the thermistor is good, replace main
control and calibrate washer (see page 4).
Perform Automatic Test to verify repair.
DO NOT REMOVE OR
Approx. Resistance
(K )
163
127
100
79
62
50
40
33
27
22
18
15
12
10
DESTROY
TEST #6: Water Level
This test checks the water level sensing
components. NOTE: Usually, if the pressure
transducer malfunctions, the washer will
generate a long fill, or long drain error.
1. Check the functionality of the pressure
transducer by running a small load cycle. The
valves should turn off automatically after sensing
the correct water level in the tub. The following
steps assume that this step was unsuccessful.
2. Drain the tub until all water has been removed.
3. Unplug washer or disconnect power.
4. Remove console to access main control.
5. Check hose connection between the
pressure transducer on the main control and
the pressure dome attached to the tub.
6. Check to ensure hose is routed correctly in
the lower cabinet and not pinched or crimped
by the back panel.
7. Verify there is no water, suds, or debris in
the hose or dome. Disconnect hose from main
control and blow into hose to clear water, suds,
or debris.
8. Check hose for leaks. Replace if needed.
9. If the preceding steps did not correct the
problem, replace main control and calibrate
washer. Run fill cycle to test and verify repair.
TEST #7: Drain Pump
Perform the following checks if washer does
not drain.
NOTE: Refer to Figure 6, "Drain Pump Strip
Circuit" on page 18 for tests and measurements.
IMPORTANT: Drain water from tub before
accessing bottom of washer.
1. Check for obstructions in the usual areas.
Clean and then perform step 2.
2. Check the drain pump and electrical
connections by performing the Drain Test under
Manual Test Mode on page 9. The following
steps assume that this step was unsuccessful.
3. Unplug washer or disconnect power.
4. Remove console to access main control.
5. Visually check that the J16 connector is
inserted all the way into the main control.
 If visual check passes, go to step 6.
 If connector is not inserted properly,
reconnect J16 and repeat step 2.
PAGE 17