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12.4 Mold Thermostat
This is a single-pole, single-throw, bimetal switch. It starts
an ejection cycle by closing at 15º F ± 5º F. The reset tem-
perature is 50º F ± 5º F. The thermostat is in series with
the mold heater and acts as a safety against overheating
in case of a mechanical failure. If the thermostat is defec-
tive, replace it. The mold thermostat starts the ice ejection
cycle. The freezer must be down to proper temperature
for the mold thermostat to start the cycle.
12.5 Shut Off Arm
12.6 Mold Switches
The three switches are single-pole, double-throw style.
They are identical and interchangeable. The holding
switch assures completion of a revolution once a cycle
has started. The water valve switch opens the water valve
during the ll stage of the cycle.
NOTE: This is the only adjustable component of the ice
maker. If you use a double throw switch, DO NOT use the
N.O. terminal. The shutoff switch stops the ice maker’s
operation when the storage bin is full.
12.7 Timing Motor
This is a low-wattage, stall-type motor which is geared to
the timing cam and ice ejector. It is a one RPM motor. To
check the motor, disconnect power to the appliance and
test for continuity between the two leads. If you have no
continuity, replace the motor. If you have continuity and
the motor runs, DO NOT replace.
12.8 Water Valve
This valve is solenoid operated. When it is open, it re-
leases water from the source to the mold. The amount of
water is proportional to the length of time the water valve
switch is held closed by its timing cam. Disconnect power
to the appliance, remove the wires to the water valve so-
lenoid coil, and check for continuity between the two ter-
minals. The Ohms value should be between 200 to 500.
If you have continuity, the solenoid is good. It takes 10-15
watts to energize the solenoid coil. The mold heater and
coil are in series. When the mold heater is activated, this
causes the voltage to drop to about 105 VAC at the coil.
The valve has a ow washer inside which acts as a pres-
sure regulator. A strainer is installed to prevent dirt, rust,
etc, from entering the valve. Check for any debris which
might obstruct the ow of water, or prevent the valve from
closing completely when the circuit is not energized. Re-
move any obstructions. If the valve still fails to operate
properly, replace it. If the valve has been cracked from
freezing this would not be a warranty item.
The shutoff arm is cam driven. It operates a switch to con-
trol the quantity of ice produced. During the ejection cycle
the arm is raised and lowered during each of the two revo-
lutions of the timing cam. If the shutoff 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 shutoff 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 re-
pair or replace parts as necessary.
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