Water Heating / Heat Dry - 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.

Water Heating / Heat Dry

This test will check the wiring to the heater element and hi-
limit thermostat and the heating circuit itself. The following
items are part of the heater circuit.
■ Harness/Connection
■ Heater Coil
■ Hi Limit Thermostat
■ Control Board
Test Procedure
Control may be programmed to disable the heater if it detects
a problem with the heating system. Run Diagnostics to clear
the control and allow the heater to turn on again. If heating
problem is not corrected, the control will disable the heater
again.
1. Unplug dishwasher or disconnect power.
2. Remove outer door panel to access control board.
3. Disconnect P4 from the control board.
Strip Circuit – Heater Circuit
6-10 KitchenAid 2013 Stainless Steel Tall Tub Dishwasher
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For Service Technician Use Only
4. Using an ohmmeter, measure resistance between P4, pins
3 and 4.
¾ If the resistance is between 8-30 ohms, go to step 6.
¾ If an open circuit is detected, go to step 5.
5. Visually check the wire connections between the control
board, the heater element, and the hi-limit thermostat. If
the connections look good, check for continuity across the
heater element and the hi-limit.
¾ Replace heater element or hi-limit thermostat if it is
electrically open.
¾ Repair or replace wire harness if test fails continuity.
6. Reconnect P4 to control board.
7. Plug in dishwasher or reconnect power.
8. Check for AC voltage from the Control. Start the
Diagnostic Cycle and at the proper interval measure for
AC out of the control between P4-3 and P4-4 using a
voltmeter set to AC.
¾ If 120V AC is measured and heater element is on, go to
step 9.
¾ If no AC voltage is measured, replace control board.
9. Perform Diagnostic Cycle to verify repair.
¾ If heater related error still exists, perform Water
Sensing test procedure on following page.
10. Unplug dishwasher or disconnect power.
11. Reassemble all parts and panels.
12. Plug in dishwasher or reconnect power.