Fill Circuit - KitchenAid KUDE20FB*0 Technical Education

TESTING
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.

Fill Circuit

This test will check the wiring and components in the fill
circuit. The following items are part of the fill circuit.
■ Harness/Connection
■ Overfill Switch
■ Fill Valve
■ Control Board
Test Procedure
1. Verify water supply is turned on and supply line is
adequate. Check for water siphoning out of the unit (drain
loop or improper drain connection). Check for debris in
water line or fill valve inlet screen. Check for proper float
switch operation. Repair as necessary.
2. Are all the loads controlled by TRIACS not working?
¾ YES – check for open door switch, TRIAC fuse, or pilot
relay.
¾ NO – just the Fill Valve. Go to step 3.
3. Unplug dishwasher or disconnect power.
Strip Circuit – Fill Valve
6-8 KitchenAid 2013 Stainless Steel Tall Tub Dishwasher
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For Service Technician Use Only
4. Remove outer door panel to access control board.
5. Unplug connector P6 from control board.
6. Check the fill valve and harness—using an ohmmeter,
measure the resistance between P6-4 and P6-6.
¾ If the resistance is between 890-1090 ohms, the fill
valve and harness are good. Go to step 7.
¾ If outside the range, replace the fill valve.
¾ If an open circuit is detected, check connections and
harness continuity between control and fill valve. If
good, replace the fill valve.
7. Check the float (overfill) switch—using an ohmmeter,
measure the resistance between P6-1 and P6-3 with the
float switch closed/float down.
¾ If 3 ohms or less is measured, go to step 8.
¾ If an open circuit or high resistance is measured, check
connections and harness continuity between the
control and float switch. If harness is good, replace
switch and retest.
8. Using an ohmmeter; measure the resistance between
P6-1 and P6-3 with the float switch open/float up.
¾ If reading is infinite, go to step 9.
¾ If 3 ohms or less is measured, or float/overfill switch is
damaged, replace switch and retest.
9. Reconnect P6 to control board.
10. Plug in dishwasher or reconnect power.
11. Check for AC voltage from the Control. Start the Diagnostic
Cycle and at the proper interval measure for AC out of the
control between P6-4 to P6-6 using a voltmeter set to AC.
IMPORTANT: The Fill Valve must be connected to the
control board to measure voltage accurately!!!
¾ If no AC voltage is measured, replace the control board
and retest.
¾ If 120V AC is measured and fill valve is energized, go to
step 12.
12. Perform Diagnostic Cycle to verify repair.
13. Unplug dishwasher or disconnect power.
14. Reassemble all parts and panels.
15. Plug in dishwasher or reconnect power.