Bosch SHI 4302 Assembly instructions

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Page 1
1st Edition/Revision 2 Thursday, May 17, 2001
TABLE OF CONTENTS
Measuring resistances from the front of SHU/SHI 43/53/68 dishwashers……A-1
Measuring resistances from the front of SHU 99 & SHV 43/48 dishwashers.. A-2
Measuring resistances from the front of SHU 33 dishwashers….....…………. A-3
Measuring resistances from the front of SHU 303x dishwashers.……………. A-4
Installing jumper for control modules for SHU 53x dishwashers.……………..A-5
Using the test program to troubleshoot the heater, flow switch and Hi-Limit
thermostat from the front of SHI/U 43/53/68 dishwashers……….……………...B-1
Key parts changes for SHU/SHV/SHI UC/11 dishwashers for softer bearing..B-2
Using front cover to replace SHU 43/53/68 control module buttons…………..B-3
Soldering SHU 43/53/68 control module heater relays…………………………..B-4
SHU Dishwasher Quick Check Chart…………………………………………..……C-1
SHU Dishwasher Troubleshooting Chart…………….……………………………. D-1
SHU 43/53/68 Schematic Diagram #36 (reprinted from Tech Manual)..……….E-1
SHV 43/48 Schematic Diagram #48 (reprinted from Tech Manual)……………. E-2
SHU 43/53/68 Dishwasher Test Programs…………………………………………. F-1
SHV 43/48 Dishwasher Test Program………………………………………………. F-2
SHU 99 Dishwasher Test Programs………………………………………………….F-3
SHU 33 Dishwasher Test Program…………………………………………………...F-4
Using Dishwasher Serial Number to find Date of Manufacture…....….……….G-1
Dishwasher Notes……………………………………………………………………… H-1

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Page B-2
1st Edition/Revision 0 Friday, September 22, 2000
K e y f u n c t i o n a l p a r t s c h a n g e s f o r S H U/S H V /S H I
d i s h w a s h e r s f o r “ s o f t e r b e a ri n g ” i n d e x U C/1 1
Key SHU/SHV/SHI dishwasher parts have been changed for the “softer bearing” upgrade for index #
UC/11 for all models. This made the dishwashers quieter through suspending the circulation pump
by flexible bands instead of mounting it onto the base. The key parts changes are shown below,
including part #’s and model #’s parts are used on. Please note these changes to order the correct
parts for each dishwasher model/index #. All other component assembly parts and part #’s
(drain pump, circulation pump impeller, circulation pump motor capacitor, water inlet valve,
NTC, base, etc.) are the same as before.
Part description Old part # Models used on New part # Models used on
Circulation pump 263835 All models (index #’s UC/06 &
UC/10, except SHV 43/48 UC/10) 266511 All models (index #’s UC/07, UC/11 & UC/12)
Heater assembly (for
aqua sensor)
263869 SHU 53/68 (index #’s UC/06 &
UC/10) 480317 SHU 43**/53/68 (index #’s UC/11 & UC/12)
Heater assembly (no
aqua sensor)
264462 SHU/SHI 33/43*/99 (index #’s
UC/06, & UC/10) & SHV 43/48
index # UC/06
480316 SHU/SHV/SHI 33/43*/48/99
(index #’s UC/07, UC/11 &
UC/12)
Sump 263103 All models (index #’s UC/06 &
UC/10, except SHV 43/48 UC/10) 266158 All models (index #’s UC/07, UC/11 & UC/12)
Pump support
bushings
167244 All models (index #’s UC/06 &
UC/10, except SHV 43/48 UC/10) --------
Pump support straps -------- 171596 All models (index #’s UC/07,
UC/11 & UC/12)
Gasket (pump to
sump)
165268 All models (index #’s UC/06 &
UC/10, except SHV 43/48 UC/10) --------
Pipe clamp (pump to
sump)
-------- 172272 All models (index #’s UC/07,
UC/11 & UC/12)
Pump rear housing 263314 All models (index #’s UC/06 &
UC/10, except SHV 43/48 UC/10) 267739 All models (index #’s UC/07, UC/11 & UC/12)
Pump front housing 263838 All models (index #’s UC/06 &
UC/10, except SHV 43/48 UC/10) 266514 All models (index #’s UC/07, UC/11 & UC/12)
Seal (pump to water
inlet hose)
165269 All models (index #’s UC/06 &
UC/10, except SHV 43/48 UC/10) 171598 All models (index #’s UC/07, UC/11 & UC/12)
Hose with O-ring
(water inlet to pump)
298556 All models (index #’s UC/06,
UC/07, UC/10 & UC/11) 361113 All models (index # UC/12)
*SHU 4302/4306/4312/4316 models (not including SHU 4322/4326 models with digital displays).
** SHU 4322/4326 models with digital displays.
CAUTION: Although the new base can be used interchangeably with new or old parts, the parts themselves
cannot be used interchangeably. A new pump, sump or heater assembly must be replaced by new parts and
cannot be used with the old pump, sump and heater assembly. Similarly, the old pump, sump or heater
assembly must be replaced by old parts and cannot be used with the new pump, sump and heater assembly.

B/GPage B-3 Service Bulletin
Using # 264946 Front Cover to Replace Broken # 266746,
# 263832 or # 264461 Control Module Buttons
NOTE:The #
264946 front
cover fits on all
three modules -
- the # 266746,
# 263832 and #
264461.
1st Edition/Revision 3 Wednesday, May 9, 2001
# 266746, # 263832 or # 264461 control modules are often replaced when
buttons break, not for electronic failures. Replacing the # 264946 front cover
when buttons break instead of replacing the entire control module will save
customers time and money.
HINT: When customers
report broken buttons on their
dishwashers, the cause is
almost always broken tabs on
the front cover. The white or
black buttons on the fascia
panel and the control module
keypad rarely fail.
NOTE: The # 264946 front
cover has a short lead time
while control modules have
long four month lead times
(from Germany). Using the
cover to replace broken
buttons will avoid delays in
obtaining parts.
HINT: Use the # 264946 front
cover instead of replacing an
older 263832 module with a
266746 module to save
customers time and money.
Many 263832 modules have
been replaced merely for
broken buttons.
NOTE: To determine which control module you have, check the model #’s on the following list:
266746 -- SHU 5302/5304/5305/5306/5312/5314/5315/5316/6802/6805/6806 UC 11 - UC/12, SHU 5307/5317 UC/12
and SHI 6802/6805/6806 UC/11 - UC/12.
263832 -- SHU 5302/5304/5305/5306/5312/5314/5315/5316/6802/6805/6806 UC 06 and SHI 6802/6805/6806 UC/06.
264461 -- SHU 4302/4306/4312/4316 UC 06 - UC/11 - UC/12 and SHI 4302/4306 UC/06 - UC/11 - UC/12.
266746,
263832 or
264461
264946
CAUTION: Insert display module board carefully to
prevent breaking spring locking tabs on front cover.
When installing display module, carefully slide top of
board into top of front cover, making sure board is
fully seated into tabs. Then, carefully rotate bottom
of board into position so spring locking tabs spring
back and lock without cracking or breaking. DO NOT
FORCE bottom or top of display board into position.
Top of front cover
Bottom of front cover
Broken control module
“buttons” occur when
tabs on front cover
break. Use plastic front
cover when replacing
“broken buttons”.
Top tab
CAUTION: Some pc board components are sensitive to static electricity and can be damaged by personnel through
touch or close proximity. Personnel handling pc boards should be grounded.
Note cracks in plastic locking tabs.

B/G
Page B-4 Service Bulletin
Soldering # 266746, 263832 or 264461 Control Modules for SHU/I 43/53/68
& GM 915-710 Dishwashers (excepting SHU 4322/4326)
Occasionally, a heater relay terminal soldered to a # 266746, 263832 or 264461
control module pc board can burn. Heater relays can be resoldered to save
customers time and money. Please follow these instructions carefully when
resoldering a heater relay terminal.
HINT:Soldering irons give
superior results compared to
soldering guns - using an iron
with a small tip (~ 25W) reduces
possibility of damaging pc
board. DETAILED INSTRUCTIONS:
1. Carefully clean burned terminal with a small piece of extra
fine sandpaper, taking care not to scratch pc board.
2. Use an iron with a small tip. Heat soldering iron up to
temperature. Coat tip with small amount of solder.
3. Using rosin core 60/40 solder, hold tip of hot iron to
terminal and briefly touch terminal with solder. Don’t use
excessive amount of solder to avoid damaging pc board.
4. Pull iron from terminal and let solder joint cool.
5. Inspect solder joint -- a good solder joint should be shiny,
not dull. If solder joint is dull, carefully resolder.
6. If joint is sound, carefully clean finished joint with a clean
cloth. Carefully remove any lint from pc board.
7. Reinstall pc board to control module, then reinstall control
module to dishwasher. Check dishwasher and make sure
it operates properly, including how it heats.
1st Edition/Rev. 1 Wednesday, May 9, 2001
CAUTION:
!
!!
!Do not overheat solder joint -- pc board can be damaged by excessive heat. Make sure
soldering iron is fully heated before soldering and keep heating time as short as possible.
!
!!
!Use rosin core 60/40 solder when soldering pc boards as acid core can etch pc boards.
!
!!
!Do NOT resolder if relay terminal or pc board is damaged -- replace entire control module.
!
!!
!To avoid overheating pc board, use a moderately sized soldering iron (~ 25W).
Burned board -- showing burned
terminal on back of pc board.
Good board -- showing proper soldering
on back of pc board.
HINT: The heater relay is the
largest of three relays in the center
of the pc board & can be one of
two colors:
Black
Orange
CAUTION:Some pc board components are sensitive to
static electricity and can be damaged by personnel through
touch or close proximity. Personnel handling pc boards
should be grounded.

BPage C-1
SHU/SHI/SHV Dishwasher Quick Check Chart
1st Edition/Revision 0-A Tuesday, May 11, 1999
Use this chart to quickly identify problems from front of dishwasher without removing it.
For a complete troubleshooting chart when symptoms are known, please refer to the
SHU/SHI/SHV Dishwasher Troubleshooting Chart.
NOTE: Use a multimeter with temperature, voltage/resistance and current (ampere) probes.
Do all resistance checks with power turned off. Identify each wire color and location
at the control module before looking at this chart. For a quick reference for
measuring resistances from the front of the dishwasher, please refer to the one page
diagram Measuring Resistances from the Front of any SHU or SHI Dishwasher.
NOTE: To access wire harnesses, open door and remove outer door panel (by removing
three T20 Torx screws on each side of inner door, starting from bottom -- the top six
screws hold the fascia panel to the door). Once screws are out, close door, lift outer
door panel up and pull bottom of panel out – door panel will drop out.
NOTE: Please see schematic diagram #36 for SHU/I 43/53/68 model dishwashers and
diagram #48 for SHV 43/48 model dishwashers in the Major Appliance Technical
Manual.
NOTE: An "F" fault code in the display for SHU/I 53/68 dishwashers shows there's a filling
problem (not filling, overfilling, underfilling or water in the base). The fault code can't
be reset manually – it will reset itself 15 minutes after the dishwasher has been
turned on (after testing how it fills).
To check Measure If yes If no
!
!!
!Water valve !
!!
!Resistance through
water valve terminals
(≈1000 Ω).
!
!!
!Valve may be OK –
more testing may be
needed.
!
!!
!Turn off dishwasher
and replace water
valve.
!
!!
!Drain motor !
!!
!Lift plastic terminal
cover and measure
resistance through
drain motor terminals
(≈16.5 Ω).
!
!!
!Drain motor may be
OK – more testing
may be needed.
!
!!
!Turn off dishwasher
and replace drain
motor.
HINT: Locking type terminals
are used – push a small (#1)
blade screwdriver into each
terminal notch and slide
terminal off at same time.
HINT: Start test program,
start any wash cycle or reset
dishwasher to run drain motor
-- see if water drains.
HINT: The drain motor is not
a bilge pump – it won't
remove water from the
dishwasher base.

Page C-2 B
SHU/SHI/SHV Dishwasher Quick Check Chart
1st Edition/Revision 0-A Tuesday, May 11, 1999
To check Measure If yes If no
!
!!
!Heater /flow
switch /Hi-
Limit
thermostat
(185oF)
!
!!
!Current through hot
wire into dishwasher –
should be 10.5-11 A
(amps).
!
!!
!Heater/flow switch/Hi-
Limit thermostat are
OK.
!
!!
!Test each part, turn off
dishwasher and
replace defective part.
HINT: The resistance of
heater is ≈ 11 Ω, Hi-Limit
thermostat is
≈ .3 Ω& flow
switch is ≈ .4 Ω. To measure
flow switch resistance,
remove microswitch & close
its contacts.
HINT: The NTC and Hi-Limit
(185oF thermostat) are
changed as a unit. Must pull
out dishwasher and remove
or block up tub to replace it.
HINT: Don't pull out
dishwasher and remove tub
for initial checking – only
when you're certain one of
these parts has failed.
HINT: Start test program
(SHU/I models) and skip
"draining" and "Aqua Sensor
Calibration" until water has
finished filling. When heater
comes on, measure current.
Skip "heating & circulating"
once you've measured
current to save time.
HINT: Must pull out
dishwasher and remove or
tilt/block up tub to replace
parts. Bring all three parts
before disassembling
dishwasher and test each
part separately.
HINT: The Hi-Limit
thermostat (185oF) is a bi-
metal self-resetting
thermostat.
!
!!
!NTC
(temperature
probe)
!
!!
!At control module,
measure resistance
between two brown
wires at left of right
harness (≈55 kΩat
room temperature
(72oF)).
!
!!
!NTC probably is OK. !
!!
!Turn off dishwasher
and replace NTC.
HINT: Make sure water in
sump has cooled to room
temperature before
measuring resistance.
HINT: The NTC and Hi-Limit
(185oF thermostat) are
changed as a unit. Must pull
out dishwasher and remove
or block up tub to replace it.
!
!!
!Water level
switch
!
!!
!After water fills, turn off
dishwasher and
measure (SHU/I
models) between white
wire at left of 3rd
harness from left and
2nd blue wire from left of
4th harness from left (≈
.4 Ω).
!
!!
!Water level switch is
OK.
HINT: For SHV models,
measure between white wire
at right of 1st harness & white
wire at left of 4th harness.
!
!!
!Turn off dishwasher
and replace water
level switch.
HINT: Must pull out
dishwasher and remove left
side panel to access water
level switch.
!
!!
!Float switch !
!!
!Resistance between
white wire to water
valve and white wire
either at right of on/off
switch harness (SHU/I
models) or at left of 4th
harness (SHV models)
(≈4Ω).
!
!!
!Float switch and water
valve probably are OK.
!
!!
!Test float switch and
water valve, turn off
dishwasher and
replace whatever part
was defective.

BPage C-3
SHU/SHI/SHV Dishwasher Quick Check Chart
1st Edition/Revision 0-A Tuesday, May 11, 1999
To check Measure If yes If no
!
!!
!Float switch
(cont.).
HINT: Any debris (e.g. a
cable tie) in dishwasher base
can move under float and turn
on float switch. Clean all
debris from dishwasher base.
HINT: Must pull out
dishwasher and remove left
side panel to access float
switch.
!
!!
!Aqua sensor
(SHU 53-- &
68—only)
!
!!
!Find three brown wires
at far right of control
module. Measure
resistance between
middle wire and left
(preferred) or right
wire (≥1 MΩ).
!
!!
!Sensor may be OK. !
!!
!Turn off dishwasher
and replace sensor.
HINT: The aqua
sensor does not
affect washability
and should not be
replaced (unless a
leak has occurred
around it).
HINT: Don't check this
unless customer has brought
up long wash times (and has
measured them). The sensor
checks water clarity and adds
a wash/rinse cycle only when
the rinse water is still dirty.
HINT: Can also measure
resistance between inner
terminal (light) and either
outer terminal (sensor) of
sensor itself.
HINT: Due to nature of
sensor, resistance readings
can be inconsistent.
HINT: Must pull out
dishwasher and remove left
side panel to access sensor
(for measuring or replacing).
Sensor can be pulled out of
sensor assembly at rear of
sump.
!
!!
!Circulation
motor
!
!!
!At control module,
measure resistance
(SHU/I models)
between white/red wire
on 1st harness from left
& 2nd blue wire from
right on 4th harness
from left (≈10 Ω).
!
!!
!Circulation motor may
be OK – more testing
may be needed (if
debris entered
impeller).
!
!!
!Turn off dishwasher
and replace circulation
motor.
HINT: For SHV models,
measure between white/red
wire at left of 2nd harness &
white wire at middle of 4th
harness.
HINT: Debris can get in if
filter basket wasn't properly
screwed in and locked. Don't
remove motor to clean
impeller – remove filter
basket/screen and reach
through right side of sump
into impeller.
HINT: Must pull out
dishwasher and remove or
tilt/block up tub to remove or
replace motor – do so only if
certain motor has failed or
impeller is jammed with
debris.
!
!!
!Detergent
dispenser
actuator
!
!!
!Resistance through
"wax" motor terminals
(≈2150 Ω).
!
!!
!Actuator motor may be
OK – more testing
may be needed.
!
!!
!Turn off dishwasher
and replace actuator
"wax" motor.
!
!!
!Top rack
only actuator
(SHU/I 68--
& SHV 48--
models
only).
!
!!
!At control module,
measure resistance
(SHU/I models)
between white wires of
3rd harness (from left) -
- (≈2150 Ω).
!
!!
!Actuator motor may be
OK – more testing
may be needed.
HINT: For SHV models,
measure between white/red
wire at left of 2nd harness &
white wire at middle of 4th
harness.
!
!!
!Turn off dishwasher
and replace actuator
"wax" motor.

Page C-4 B
SHU/SHI/SHV Dishwasher Quick Check Chart
1st Edition/Revision 0-A Tuesday, May 11, 1999
To check Measure If yes If no
!
!!
!Control
module
!
!!
!Run test program
(SHU/I models) and
check if indicator
lights/displays come
on and all buttons click
(and resist a bit when
pressed).
!
!!
!Module may be OK –
more testing may be
needed.
!
!!
!Go to troubleshooting
chart and check
whether module or
another part is faulty.
!
!!
!Rinse aid
dispenser
level switch
(SHU 53/68 &
SHV 48—
models only)
!
!!
!At control module,
measure resistance
between two yellow
wires (2nd harness
from right) -- (≈.4 Ω).
!
!!
!Level switch probably
is OK.
!
!!
!Check to see if rinse
aid dispenser is
empty. If not, turn off
dishwasher and
replace level switch.
NOTE: The following parts can't be serviced from the front of the dishwasher (the dishwasher
must be pulled out and the tank removed or tilted/blocked up to replace them):
•Heater
•Circulation motor
•Aqua sensor ("Sensotronic")
•NTC (temperature probe)/Hi-Limit (185oF) thermostat
NOTE: You will need a T20 Torxscrewdriver and may need #1/ #2 flat blade screwdrivers
and a pair of needlenose pliers. Many parts can be snapped out without using tools.
NOTE: On SHU/I 43/53/68 models, run test program to identify dishwasher problems (please
see page F-1). The test can run more than one hour (to get temperature up to
150oF), but tests can be cancelled to greatly shorten testing time. The test program
allows draining, filling, circulating and heating to be checked more quickly than
running a standard wash cycle.
To use test program for troubleshooting, measure voltages/currents as parts come
on. For example, run heating test and measure current coming into dishwasher – if
current ≈11A, Hi-Limit, heater and flow switch are OK. If not, check each part to see
which one failed. This test saves time since you can't get to these parts without
removing the tank and can't run resistance checks from front of dishwasher because
flow switch stays open. Please see page B-1 on using test program to troubleshoot
heater, flow switch and Hi-Limit.

BPage C-5
SHU/SHI/SHV Dishwasher Quick Check Chart
1st Edition/Revision 0-A Tuesday, May 11, 1999
NOTE: To cancel/drain dishwasher while it's cycling, press and hold the following
buttons (until dishwasher starts to drain):
!SHU/I 43-- & SHV 43/48 !Press and hold "Regular Wash" & "Power
Scrub Plus" buttons
!SHU/I 53/68 !Press and hold "Scrub Wash" &
"Delicate/Economy" buttons until "CL"
shows on display
▲
▲▲
▲WARNING!
ELECTRICAL SHOCK HAZARD (120 VAC)
•TURN OFF ELECTRICAL POWER AT THE CIRCUIT BREAKER OR FUSE BOX BEFORE
DISASSEMBLING OR REPAIRING THE DISHWASHER.
•MAKE SURE THE DISHWASHER IS ELECTRICALLY GROUNDED.
•USE COPPER CONDUCTORS ONLY FOR ALL WIRING OR REWIRING. FAILURE TO
FOLLOW THESE INSTRUCTIONS COULD RESULT IN SERIOUS INJURY OR DEATH.

Page D-1 B
SHU/SHI/SHV Dishwasher Troubleshooting Chart
1st Edition/Revision 0-A Tuesday, May 11, 1999
NOTE: For minor problems from improper usage or lack of maintenance, please refer
customer to the Self-Help chart in their Use and Care Manual.
Problem Possible Cause Suggested Action
!
!!
!Washability
problems
(dishwasher
won't clean
properly)
!
!!
!Inappropriate dishwasher
detergent used.
!
!!
!Blocked or clogged upper/
lower spray arms.
!
!!
!Instruct customer to use a powdered
dishwasher detergent (e.g. Cascade
powder).
!
!!
!Check spray arms – clean or replace
as needed.
!
!!
!Water doesn't circulate
properly due to debris in
circulation motor impeller.
!
!!
!Twist and remove filter, then remove
debris from right side of sump where
water enters circulation pump impeller.
If debris has jammed impeller, turn off
and pull out dishwasher, remove tank,
remove circulation motor and unscrew
and clean out impeller.
HINT: If impeller is damaged, replace entire
impeller assembly or it won't seal adequately.
!
!!
!Filter not locked down
securely, allowing debris to
enter sump.
!
!!
!Twist and remove filter, then remove
debris from sump. Instruct customer to
twist and lock filter (cylinder) securely
into sump.
CAUTION: Use caution when
removing debris from sump to avoid
being cut by sharp debris such as
aluminum can tabs or broken glass.
HINT: Due to high temperature rinse (161oF)
breaking down food debris and triple filtering
system trapping food debris, filters shouldn't
normally clog up. Problem often caused by filter
not being securely locked down. Instruct
customer to twist and lock filter (cylinder)
securely into dishwasher sump.
HINT: Water level will
not affect washability as
water fill is measured by
pressure, not time –
water level cannot be
adjusted.
!
!!
!Drain hose behind
dishwasher doesn't have an
adequate loop.
!
!!
!Partially clogged air gap,
allowing wastewater from
prior washes to circulate in
dishwasher.
!
!!
!Loop drain hose behind the dishwasher
(with the top of the loop) at least 20"
above the floor.
!
!!
!Unclog sink air gap.
NOTE: Cleaning sink air gaps is not covered
under warranty.
!
!!
!Water doesn't drain properly !
!!
!See Water doesn't drain properly on
page D-4.
!
!!
!Soap doesn't enter
dishwasher due to dispenser
actuator (A2) failure.
!
!!
!Turn off dishwasher and test actuator –
replace if faulty.

BPage D-2
SHU/SHI/SHV Dishwasher Troubleshooting Chart
1st Edition/Revision 0-A Tuesday, May 11, 1999
Problem Possible Cause Suggested Action
!
!!
!Washability
problems
(dishwasher
won't clean
properly) (cont.)
HINT: Must pull out dishwasher and
remove left side panel to access float
switch.
HINT: One "wax" motor operates both the
detergent and rinse aid dispensers through a
mechanical linkage. The system always resets
when door closes. Check linkage by moving it
manually. Check "wax" motor by running a
continuity check on its terminals.
!
!!
!Suds or foam
remains in
dishwasher.
!
!!
!Too much detergent used.
!
!!
!Improper detergent used
(other than powdered
dishwasher detergent).
!
!!
!Dishwasher doesn't drain
properly.
!
!!
!Instruct customer to use less.
!
!!
!Instruct customer to use a powdered
dishwasher detergent (e.g. Cascade
powder).
!
!!
!See Water doesn't drain properly on
page D-4.
!
!!
!Dishes won't dry
properly.
!
!!
!Rinse aid not used. !
!!
!Instruct customer on using rinse aid –
dishes won't dry without it.
!
!!
!Dishwasher has
an odor.
!
!!
!Standing water in dishwasher
sump.
!
!!
!Unclog air gap. Make sure top of drain
hose loop (behind dishwasher) is at
least 20" above floor (add a loop in
hose if there isn't one).
HINT: Water level in sump should
be at or below drain motor cover.
!
!!
!Standing water in dishwasher
base.
!
!!
!Minerals in customer water
supply.
!
!!
!Food debris in dishwasher
filters.
!
!!
!Turn off dishwasher, drain water
manually from dishwasher base and
correct source of water leakage.
!
!!
!Recommend customer to get water
tested and use an appropriate water
softener.
!
!!
!Clean dishwasher filters.
!
!!
!Dishwasher
won't run or
indicator lights
won't come on.
!
!!
!Dishwasher not turned on.
!
!!
!No power to dishwasher.
!
!!
!Door ajar or on/off switch
failed.
!
!!
!Door latch has broken.
!
!!
!Indicator light failed.
!
!!
!Turn on/off switch on.
!
!!
!Check customer circuit breaker, fuse
box or power connections.
!
!!
!Turn off dishwasher and check door or
on/off switch -- adjust or replace them.
!
!!
!Turn off dishwasher and replace door
latch – instruct customer to not pull on
door without pulling latch.
!
!!
!Run test program to see if light failed
(for SHU/I 43/53/68 models only – see
page F-1). If so, turn off dishwasher
and replace indicator light.

Page D-3 B
SHU/SHI/SHV Dishwasher Troubleshooting Chart
1st Edition/Revision 0-A Tuesday, May 11, 1999
Problem Possible Cause Suggested Action
!
!!
!Dishwasher
won't stop filling
or won't stop
draining.
!
!!
!Water in dishwasher base
from leaky or loose hose.
!
!!
!Dishwasher isn't level,
causing float switch (e6) to
operate.
!
!!
!Float switch or diaphragm
(e6) failed.
!
!!
!Debris in dishwasher base
activated float switch (e6).
!
!!
!Turn off dishwasher, drain water
manually from dishwasher base and
reinstall or replace hose.
!
!!
!Level dishwasher using front and rear
leveling legs (see customer dishwasher
installation instructions).
!
!!
!Turn off dishwasher and replace float
switch or diaphragm.
!
!!
!Turn off dishwasher and remove debris
from dishwasher base
!
!!
!Water doesn't
drain properly.
!
!!
!Kink in drain hose.
!
!!
!Dishwasher filter(s) or sump
clogged.
!
!!
!Straighten or replace drain hose.
!
!!
!Clean dishwasher filters or sump.
!
!!
!Drain motor impeller clogged. !
!!
!Turn off dishwasher, remove drain
motor cover (in sump) and clean
impeller. If necessary, remove drain
motor to clean impeller.
CAUTION: Use caution
when removing debris
from sump to avoid being
cut by sharp debris such
as aluminum can tabs or
broken glass.
!
!!
!Kitchen sink or sink air gap
clogged.
!
!!
!Drain motor (m3) failed.
!
!!
!Timer (SHU 30/40 models) or
module (all other models)
failed.
!
!!
!Improper drain connection
height (< 20" or 508mm
above floor).
!
!!
!Unclog sink or sink air gap.
NOTE: Cleaning sink air gaps or sinks are not
covered under warranty.
!
!!
!Turn off dishwasher and measure
resistance at motor terminals (≈16.5
Ω). Replace faulty motor.
!
!!
!Check voltage at and wiring to timer or
module. Turn off dishwasher and
replace faulty timer or module (for
SHU/I 43/53 models, install existing
module jumper onto new module).
!
!!
!Install drain height and sink air gap
according to local codes.
!
!!
!Water fills too
slowly.
!
!!
!Low customer water supply
pressure.
!
!!
!Inadequate customer water
supply piping.
!
!!
!Scale in customer supply
piping or dishwasher
piping/parts from hard water.
!
!!
!Adjust customer water supply pressure
(to 5-20 psi or 0.3-8.27 bars).
!
!!
!Install appropriate piping to dishwasher
(minimum 3/8" copper tanking)
according to local codes.
!
!!
!Clean or replace clogged piping/parts
and have customer get water tested
and use appropriate water softener.