Specifications

To test the
defrost heater and thermostat
when the
evaporator
temperature
is
*
15o
F
or below
proceed
as
follows:
1.
Disconnect the
unit
f rom
power
source
and
plug
it into
a wattmeter.
2. Plug wattmeter into
power
source and
manually
advance the defrost timer to
the
defrost cycle. See the defrost timer
section for information
on
manually
advancing the timer.
The
wattmeter
should
read
between
400
and 510
watts
depending
on
the
model
(total
wattage
of the divider
heater,
timer motor
and def
rost
heater).
Should the reading
be
'10
watts the
defrost
heater
or thermostat
is
defective. To further isolate
the
defective
part
proceed
to
Step
4.
Disconnect
unit from wattmeter.
Follow
Steps 2 and
3 of
testing
the
heater
and thermostat
when the
evaporator
temperature is
above
+
15o F
or
higher.
lf the
meter reads
between 42K and
63K
ohms.
the
defrost thermostat
is
defective.
To
use an ohmmeter
set the meter to R x
1K scale. lf the reading
is
approximately
25 to
31 ohms. the
defrost heater
and
thermostat
are
operative.
REPLACING
RADIANT DEFROST
HEATER
Disconnect
the
unit f rom
power
sou rce.
Remove
the facade mounting
screws
and the facade
(facia).
Remove the
divider channel
mounting
screws.
Carefully
pull
the
channel
out
from
under the
center hinge.
Slide the freezer
bottom out of
the
cabinet.
Remove
the
evaporator cover. lt is
very
important
that this
part
be
reinstalled
in
the same manner
as it
was
originally.
Disconnect
the radiant heater
wire
leads.
Remove the heater
retainer clip with
long nose
pliers.
8.
Pull
the shield
and
the
heater
out.
9. Install the replacement
heater in the
reverse
order of removal.
NOTE: When
installing the
replacement
heater
do
not
touch
glass.
Salt from finger
tips
could cause
damage.
REPLACING
THE DEFROST
THERMOSTAT
The defrost
termination
thermostat
is
located
beside the
evaporator on the
back,
left hand
side.
1. Follow
the first
five
steps
in
replacing
the heater.
2.
Disconnect
the leads
f rom the
thermostat.
4.
5.
6.
7.
4.
5.
6.
1.
2.
3.
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