Whirlpool W10441082B Manuel D'instructions page 18

FOR SERVICE TECHNICIAN'S USE ONLY
TEST #7: Water Level Sensor
This test checks the water level sensor, ACU,
and wiring. NOTE: Usually, if the water level
sensor malfunctions, the washer will generate
a long fill or long drain error.
1. Check the functionality of the water level
sensor 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.
Figure 7 - Water Level Sensor
2. Press START/PAUSE to stop the cycle and
then press POWER. The cycle will cancel and
drain the water from the tub.
3. Unplug washer or disconnect power.
4. Remove top and rear panels to access tub,
air trap, and pressure hose connections. Water
level sensor is located at top right rear of cabinet.
5. Check connections from tub to air trap,
air trap to pressure hose, and pressure hose
to water level sensor.
6. Check to ensure hose is routed correctly in
the lower cabinet and not pinched or crimped.
7. Verify there is no water, suds, or debris
in the hose or air trap. Disconnect hose from
water level sensor, clean air trap and remove
and blow into hose to clear water, suds,
or debris.
8. Check hose for leaks. Replace if needed.
9. Visually check that connector J28 is
inserted all the way into the ACU (refer to
ACU diagram on page 13). Also check that
the water level sensor harness is securely
connected to the sensor.
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10. Check the harness between the ACU and
water level sensor for continuity.
 If there is continuity, go to step 11.
 If there is no continuity, repair or replace
as necessary.
11. Plug in washer or reconnect power.
12. With a voltmeter set to DC, connect black
probe to ACU connector J28, pin 1 (GND) and
red probe to J28, pin 4 (+5V [Vcc]).
 If +5V DC is present, replace the water
level sensor. (Before replacing the sensor,
make sure that there is NO water remaining
in the tub or there will not be an accurate
water level measurement and an error code
may appear. Drain the tub by running a
drain & spin cycle with the sensor plugged
into J28 but with the hose removed).
 If+5V DC is not present, perform TEST
#1: ACU Power Check on page 13.
13. If the preceding steps did not correct the
problem, replace the ACU.
 Unplug washer or disconnect power.
 Replace the ACU.
 Reassemble all parts and panels.
 Perform the "Quick Diagnostic Test"
on page 6 to verify repair.
TEST #8: Drain Pump
Perform the following checks if washer does
not drain.
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 "Quick Diagnostic
Test" on page 6. The following procedures
assume that this step was unsuccessful.
3. Unplug washer or disconnect power.
4. Remove top panel to access machine
electronics.
5. Visually check that the J17 connector is
inserted all the way into the ACU. Refer to
ACU diagram on page 13.
 If visual check passes, go to step 6.
 If connector is not inserted properly,
reconnect J17 and repeat step 2.
6. Remove connector J17 from the ACU.
With an ohmmeter, measure the resistance
across pins 1 and 2.
DO NOT REMOVE OR DESTROY