Sears C110 - Hi-Temp Light Operation; Indicator Light Checking and Replacement

HI.TEMP LIGHT
The
Hi-Temp
Light
has
a
potential
circuit
through the
entire
dishwasher
cycle. Refer to
figure
8. The
potential
circuit
(broken
lines)
exists
from
the timer,
through
the
Hi-Temp
light
and
timer motor,
to
neutral.
However,
the timer
contact
that
controls the
ti-
mer motor is
closed
through the
entire dishwash-
er cycle
(except
in increments 4 and 36
which
are *re thermostatic hold
increments
on
the
ti-
mer).
Since
current
takes the
path
of least
resistance,
in
this
case through
the
timer
motor,
there
is
not
enough
current
across the
Hi-Temp light to illu-
minate
iti
When timer contact
22
opens
in
the thermosta-
tic
hold
(increments
4
and 36) current
will
flow
through
the
indicator light. This condition will
only occur
if the water temperature
is lower
than
145o F
(63'C)
and
the
thermostat
is open.
See
Figure
9. The
indicator light will
be ON
but
there
is
not
enough current across
the timer
mo-
tor to
make it run.
Figure 9
lf the
water temperature
is
145o
F
(63'C)
or
higher and the thermostat
is closed, a circuit
will
be
completed
through
the thermostat and
the ti-
mer
motor
will
be
energized,
advancing
the ti-
mer
to
the
next increment, closing timer con-
tact22
Figure
10.
T.F.
26
-
#27
Figure
10
CHECKING
The
lights
are
neon bulbs
with
an
internal
resis-
tor, so they
cannot be checked
for
continuity.
Put
120
volts
AC across
the
leads at the
indica-
tor bulb
disconnect
plug.
lf the
bulb does
not
glow,
it
is
bad and the
whole
indicator bulb
pack
must be
replaced.
lf
the bulb
does
glow,
look
at the
wiring diagram
to see
which contacts
in the
pushbutton
switch
and
timer
need to be checked to
isolate the
pro-
blem.
REPLACEMENT
THE
BULB
PACK SWIE
IIIDICATOR
TIGHT IS
REMOVEO AS SHOW]I
4
Figure I