Dometic
®
MANUAL
Refrigerators
79
To check the compressor, unplug the appliance or
otherwise be sure all power is off to the appliance.
Remove the wires on the start device and overload.
Check for continuity on terminal 14 to 12 and terminal 14
to 13 and terminal 12 to 13. Continuity should be
present.
Next, check each terminal (12, 13 and 14) for continuity
to the compressor casing ground terminal. Continuity
should NOT be present.
If continuity test results are proper the compressor is
good electrically and does not need to be replaced. If
continuity test results are outside of the described
checks, the compressor is defective electrically and
needs to be replaced.
FAN MOTOR
There are two wires to the fan motor. Disconnect power
to the appliance, and check for continuity between the
two terminals. There should be continuity.
Scrape a spot of paint off the motor housing. Check for
continuity between the motor housing and each of the
leads. If there is continuity, the motor is defective and it
must be replaced. If the motor checks are proper, do not
replace it.
MOLD HEATER
The mold heater
uses 165 watts to
thaw the ice free
from the mold. It
is wired in series
with the thermo-
stat which also
acts as a safety
device. With
power to the appliance off, check for resistance between
the two leads to the heater element. You should obtain a
reading of approximately 80 ohms. If the heater is found
to be defective, the manufacturer recommends replace-
ment of the entire ice making unit for proper operation.
MOLD HEATER
(Staked in Place)
CASING
GROUND
TERMINAL
"D" SHAPED
DRIVE END
THERMOSTAT
CLAMP
SHUTOFF/ICE LEVEL BAIL ARM
The shut-off arm is cam driven. It operates a switch to
control the quantity of ice produced. During the ejection
cycle the arm is raised and lowered during each of the
two revolutions of the timing cam. If the shut-off arm
comes to rest on top of the ice in the storage bin during
either revolution, the switch will remain open and stop
the ice maker at the end of that revolution. The arm has
a manual shut-off built into the linkage; by raising the
arm as high as possible, it will lock in that position until
forced down. If the arm and switch do not operate
properly, check for damage and repair or replace parts
as necessary.
ARM UP
STOPS
OPERATION
ARM DOWN -ICE MAKER
WILL OPERATE
ICE EJECTOR
The ice ejector blades
sweep the ice from
the mold cavities
during the ejection
cycle.
The drive end of the
ejector is "D" shaped
for positive coupling.
The bearings at both ends are
lubricated with silicone grease. If the ejector blades are
frozen into the ice, defrost the ice maker and manually
cycle the ice making unit, making sure the ejector stops
at the right location.
MOLD THERMOSTAT
This is a single-pole, single-throw, bimetal switch. It
starts an ejection cycle by closing at 18ºF ± 5º. The
reset temperature is 50ºF ± 5º. The thermostat is in
series with the mold heater and acts as a safety against
overheating in case
of a mechanical
failure. To
check the
thermostat,
disconnect
one wire and
do a continu-
ity check.
The tem-
perature
surrounding
the ice maker must be at 20°F. or lower. You should get
a continuity reading. If the thermostat is defective,
replace it.
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