Bosch SHI 4302 Troubleshooting Tips page 22

Page D-5
SHU/SHI/SHV Dishwasher Troubleshooting Chart
Problem
ü ü ü ü Water doesn't
heat up properly
(cont.).
ü ü ü ü Dishwasher cycle
runs too long, yet
dishwasher
washes, rinses
and shuts off OK.
ü ü ü ü Water leaks from
front of
dishwasher.
Use a multimeter with temperature, voltage/resistance and current (ampere) probes.
NOTE:
Do all resistance checks with power turned off. Identify each wire color and location
at the control module before looking at this chart.
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.
st
1 Edition/Revision 0-A
Possible Cause
ü ü ü ü Heater (r 1) failed.
ü ü ü ü Water flow switch (e 5) failed.
ü ü ü ü Timer (SHU 30/40 models) or
module (all other models)
failed.
ü ü ü ü Customer hot water supply
isn't hot enough (< 140
o
60 C).
ü ü ü ü Blocked or clogged upper or
lower spray arms.
ü ü ü ü Excessive foaming.
ü ü ü ü Damaged door gasket.
Suggested Action
ü ü ü ü Run test program (SHU/I 43/53/68
models – see page B-1) – measure
current to dishwasher. If current ≈
11A, heater is OK. If not (and for all
other models), turn off dishwasher and
measure heater resistance (≈ 11 Ω).
Replace faulty heater.
ü ü ü ü Run test program (SHU/I 43/53/68
models – see page B-1) – measure
current to dishwasher. If current ≈
11A, flow switch is OK. If not, remove
flow switch microswitch, close its
contacts & measure its resistance (≈ .4
Ω). Replace faulty flow switch.
ü ü ü ü 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).
ü ü ü ü Adjust hot water supply according to
o
F/ local codes.
ü ü ü ü Check spray arms – clean or replace
as needed.
ü ü ü ü See Suds or foam remains in
dishwasher on page D-2.
ü ü ü ü Install new door gasket, providing an
extra 1" – 1-1/4" on each side to cover
bottom of tank (for a dam to prevent
leaking from splashing water at bottom
corners of tank).
HINT: Original gasket was longer to provide a
dam for tank corners. Do not trim gasket flush
with sides of tank or leaking may occur.
For a quick reference for
B
Tuesday, May 11, 1999