Bosch SHU53 - Page 16

Page D-5 BA
SHU/SHI/SHV Dishwasher Troubleshooting Chart
1
st
Edition/Revision 0-A Tuesday, May 11, 1999
Problem Possible Cause Suggested Action
ü
üü
ü Water doesn’t
heat up properly
(cont.).
ü
üü
ü Heater (r1) failed.
ü
üü
ü Water flow switch (e5) failed.
ü
üü
ü Timer (SHU 30/40 models) or
module (all other models)
failed.
ü
üü
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
üü
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
üü
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
üü
ü Dishwasher cycle
runs too long, yet
dishwasher
washes, rinses
and shuts off OK.
ü
üü
ü Customer hot water supply
isn't hot enough (< 140
o
F/
60
o
C).
ü
üü
ü Adjust hot water supply according to
local codes.
ü
üü
ü Water leaks from
front of
dishwasher.
ü
üü
ü Blocked or clogged upper or
lower spray arms.
ü
üü
ü Excessive foaming.
ü
üü
ü Damaged door gasket.
ü
üü
ü Check spray arms – clean or replace
as needed.
ü
üü
ü See Suds or foam remains in
dishwasher on page D-2.
ü
üü
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.
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.