Ice Maker Common Parts Glossary

Bin thermistor

The bin thermistor senses the temperature at the Full mark in the storage bin and communicates the temperature to the electronic control board through a wire harness connection. When the electronic control board senses that the ice storage bin is full based on the bin thermistor reading, it stops ice production until the level of ice drops below the Full mark.

Compressor

The compressor receives low-pressure refrigerant from the evaporator plate and compresses that refrigerant into a hot, high-pressure gas. The hot gas then moves through the condenser where it’s converted to a high-pressure liquid. From there, the liquid flows through the evaporator plate, where it expands and evaporates to a gas, absorbing heat in the process and cooling the top of the evaporator. The refrigerant flows from the evaporator plate to the compressor, where the cycle starts over.

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Ice Maker Compressor 46_106_4387964
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Compressor start relay

The compressor start relay is attached to the motor voltage supply in the compressor. It applies voltage to the start-and-run windings of the compressor motor when voltage is first applied through that circuit. After the compressor starts, the relay stops voltage to the start relay so that the compressor runs using only the run windings.

Condenser

The condenser is a heat exchanger that cools and condenses the hot, high-pressure refrigerant gas to a liquid. The cool liquid refrigerant flows through the evaporator plate in the ice maker. In the low-pressure environment of the evaporator plate, the liquid refrigerant from the condenser evaporates to a gas. During this evaporation process, the refrigerant absorbs heat from the water that’s cycling across the top of the evaporator plate, and the water freezes. The cooling of the refrigerant in the condenser increases the efficiency of the heat exchange process in the evaporator so the slab of ice forms quickly in the ice maker.

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Condenser fan motor

The condenser fan motor pulls air through the condenser to cool the hot refrigerant gas so it condenses to a liquid. The cool liquid refrigerant flows through the evaporator plate in the ice maker. In the low-pressure environment of the evaporator plate, the liquid refrigerant from the condenser evaporates to a gas. During this evaporation process, the refrigerant absorbs heat from the water that’s cycling across the top of the evaporator plate, and the water freezes.

Cutter grid

The wire cutter grid is a square frame with wires arranged in a grid inside the frame. When a slab of ice falls onto the grid from the evaporator plate, the cutting grid’s wires heat up and cut the slab into square cubes.

Drain pump

The drain pump moves water out of the reservoir when the reservoir is flushed periodically to remove impurities and to remove water from ice that’s slowly melting in the ice bin.

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Ice Maker Drain pump 46_106_2313705
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Electronic control board

The electronic control board is a circuit board that controls the electrical components of the ice maker such as the compressor, cutting grid, recirculation pump and drain pump. The electronic control board receives a signal from the thermistor in the ice storage bin that indicates how much ice is in the storage bin. When the level of ice is low, the electronic control board starts the process of making ice.

Evaporator plate

The evaporator plate is a refrigerated metal plate where the ice slab forms before it’s cut into cubes. Refrigerant runs through the evaporator plate so the plate’s temperature is near zero degrees Fahrenheit. Water circulates over the top of the evaporator plate to form a slab of ice. When the slab is thick enough, the evaporator plate is momentarily heated so the slab slides off of the evaporator plate onto the cutting grid.

Evaporator thermistor

The evaporator thermistor senses the temperature of the evaporator plate to detect the thickness of the ice slab forming on the evaporator plate during the ice-making process. It communicates the evaporator temperature to the electronic control board through a wire harness connection. When the slab is thick enough to be cut into cubes, the electronic control board initiates that process, based on the evaporator thermistor’s temperature reading.

Ice maker cleaning solution

Ice maker cleaning solution removes mineral deposits from the evaporator plate and water tubes. Use ice maker cleaning solution when you run the cleaning cycle on your ice maker.

Power cord

The power cord plugs into an electrical outlet and supplies power to the ice maker.

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Recirculation pump

The recirculation pump continuously picks up water from the water reservoir and circulates the water over the evaporator plate to form a slab of ice during the ice-making process. When the slab of ice is thick enough to be cut into cubes, the recirculation pump stops, and the slab slides onto the wire cutting grid. Then the recirculation pump resumes operation to form a new slab of ice.

Switch assembly

The switch assembly houses the selection buttons on the control panel. The switch assembly is connected to the electronic control board through a wire harness.

Transformer

The transformer converts 120 volt AC power to low-voltage DC power. The low voltage DC power is used to heat the cutting grid wires that cut the slab of ice into cubes.

Water inlet valve

The water valve fills the water reservoir during the ice-making process to replenish the water that freezes to form the slab of ice on the evaporator plate.