Proper Operation
Learn how your appliance is supposed to operate so you can determine if it is malfunctioning.
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Water Level Control
The quantity of water in the tub is determined by the water level control (Figure 1). The water level is porportional to the air pressure presented to a diaphram in the level control switch. A plastic air chamber called an "air dome" is attached to the side of the outer tub, down near the bottom. As the water fills the tub, some of it flows into the air dome and compresses the air. The pressurized air is carried up to the water level control switch in the control console. There must be no air leaks in this path. The compressed air moves a diaphram in the water level control switch which is mechanically linked to the position of the water level switch control. If the control is positioned for a low water level, the diaphram has to move a very small distance before the switching action takes place.
An electrical current (Figure 2) flows in one of two directions through the level control switch: (1) to the water mixing valve solenoids via the water temperature switch to permit water to fill the tub or (2) to the drive motor and agitate controls to enable the wash cycle to begin. Therefore, when the diaphram in the water level control causes the switch to move from position (1) [fill] to (2) [wash] the water inlet valve closes and the wash cycle begins.
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