Test #5: Water Inlet Valve - Whirlpool WFW3090GW Service Manual

TESTING COMPONENT
DANGER
Electrical Shock Hazard
Only authorized technicians should perform
diagnostic voltage measurements.
After performing voltage measurements,
disconnect power before servicing.
Failure to follow these instructions can result in
death or electrical shock.

TEST #5: Water Inlet Valve

This test checks the electrical connections to the valve and the
valve itself. The valve is a double valve consisting of a prewash
valve and a main wash valve.
1. Check the relays and electrical connections to the valve by
performing the Service Test Cycle on pages 2-4 and 2-5.
The following steps assume one or more of the valves did
not turn on.
5. Disconnect the J43 connector from the
2. For the valve(s) in question, check the individual solenoid
ACU. NOTE: To measure the door lock switch
coils:
in the "locked" position, plug in washer or
a. Unplug washer or disconnect power.
reconnect power. Press the POWER button,
b. Remove top panel to access the inlet valve, and then
gently lay washer on its right side to access the ACU.
select any cycle, and then press START.
c. Remove connector J15 from the ACU. Refer to ACU
Actuation of the door lock solenoid should be
diagram on page 3-5.
heard. At that point, unplug the washer and
d. Check harness connections to the solenoid valves.
disconnect J43 from the ACU and measure
Verify continuity in harness between ACU and solenoid
valves.
resistance across pins 2 & 3 (ACU side).
Resistance should measure according to the
following chart:
WATER INLET VALVE ASSEMBLY
Component Resistance
Door Lock 60–90 ohms
ACU
L1
Solenoid (Door must
be closed)
Door Door Open =
Switch Open Circuit
Door Closed =
IF-2
60–90 ohms
Lock Locked =
RELAY
Switch 0 ohms
Unlocked =
Open circuit
If resistance values are good, go to step 6.
If any of the measurements are out of
range, check the harness of the suspected
component between the ACU and door lock
3-10 Whirlpool Compact Front Load Washer
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mechanism for continuity.
If the harness and connections are
For Service Technician Use Only
FOR SERVICE TECHNICIAN'S USE ONLY
Contacts Measured
J43-1 J43-2
J43-1 J43-2
J15-1
J43-2 J43-3
Figure 2 - Water Inlet Valve Strip Circuit
3. Check valve coil resistance at the valve, or across the
following connector pinouts:
Valve
Prewash Valve
Main Wash Valve
Resistance should be 890Ω–1.1k Ω.
¾ If resistance readings are outside the range or open,
replace the valve assembly.
¾ If resistance readings are within range, reconnect J15.
Go to step 4.
4. With a voltmeter set to AC, attach the leads across the
pins of the suspect valve (see chart in step 3). Plug in
washer or reconnect power.
5. Run the Service Test Cycle and check for line voltage
across the pins of the valve. NOTE: Refer to the Service
Test Cycle on pages 2-4 and 2-5 to determine when the
prewash valve and main wash valve are actuated.
¾ If line voltage is present and valve still does not
activate, replace valve assembly.
¾ If line voltage is not present, replace the ACU.
6. Unplug washer or disconnect power.
7. Reassemble all parts and panels.
8. Perform the Service Test Cycle on pages 2-4 and 2-5 to
verify repairs.
Figure 1 - Double Valve Assembly
Figure 5 - Water Inlet Valve
1. Check the relays and electrical connections
to the valve by performing the Service Test Cycle
on page 5. The following steps assume
one or more of the valves did not turn on.
2. For the valve(s) in question, check the
PREWASH
individual solenoid coils:
J15-2
a. Unplug washer or disconnect power.
b. Remove top panel to access the inlet
MAIN WASH
valve, and then gently lay washer on its right
J15-3
side to access the ACU.
DOUBLE VALVE
c. Remove connector J15 from the ACU.
890 - 1.1K Ohms
Refer to ACU diagram on page 16.
d. Check harness connections to the
solenoid valves. Verify continuity in harness
between ACU and solenoid valves.
3. Check valve coil resistance at the valve,
Pinout
J15, pins 1 & 2
J15, pins 1 & 3
ACU
IF-1
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