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Fault Diagnostics
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Fault Steps to determine failure Failure Resolution
Will not fill
or does not
fill with
enough
water
1. Check if water supply is turned on
and water pressure is between 15-
145 psi (1-10 bar).
2. Check if water inlet screen is
blocked.
3. Check if float switch (e6) has
activated or water is in dishwasher
base.
4. Run customer service test program
and measure voltage between
water inlet valve terminals.
5. Check that orange wire connections
to flow meter are seated properly
and not damaged.
6. Check that connections to float
switch (e6) and control are seated
properly and not damaged.
7. Measure float switch (e6) resistance
between terminals 4 & 1 (by
measuring between gray wire (“L”
terminal) of drain pump (m3) and
terminal 3 of on/off switch (a1)).
8. Measure water inlet valve
resistance (between violet wires).
1. Turn water supply completely on and
adjust to proper water pressure.
2. Clean out water line and screen.
3. Check for leaks and drain water from
the base to disengage the float
switch. If water won’t drain from
dishwasher tub, see Will Not Drain.
4. If voltage is not
≈ 120V, go to step 5.
If the voltage is ≈ 120V, replace water
inlet valve.
5. If connectors aren’t properly seated,
reseat them. If properly seated,
replace flow meter or harness.
6. If connectors aren’t properly seated,
reseat them. If connectors are
damaged, replace wire harness.
7. If resistance is ≈ 0 Ω, the float switch
is stuck closed and should be
replaced. If resistance is not ≈ 0 Ω, go
to step 8.
8. If resistance is ≈ 950 Ω, replace
control.
Heater diagnosing
Test programs heat the water to 150ºF at ~ 2ºF / minute. To save time, don't
run the entire test – when water circulates and the heater is on, measure the
incoming current to the dishwasher. If the current is ~ 11A, the heater is OK. If
the current is ~ 1.5 – 2A, the control or heater could be faulty.
At the control or heater, measure the voltage between the large red heater wire
and a chassis ground or the dw neutral (WHRD on/off switch or flow switch
wire). If the voltage is 120 VAC, the control is OK. If the voltage is 0, the heater
relay has failed – replace the control.