Whirlpool APARTMENT MAINTENANCE SERIES Service Manual page 15

The water level switch is set to move from the
EMPTY position to the FULL position depend-
ing on how much tension is set on the switch
diaphragm.
3. When the customer pulls the timer knob out,
voltage is supplied to the hot and/or cold wa-
ter inlet solenoids. In the example above, both
solenoids are energized to allow water to fill
the tub.
4. As the water level rises in the tub, it causes
an increase in air pressure in the air dome
assembly mounted to the side of the tub. A
hose between the air dome and the water level
switch transfers this air pressure against the
diaphragm in the water level switch, causing
electrical contacts to move from V to P,
(EMPTY position), to V to T, (FULL position).
The washer stops filling and the water level
switch is providing voltage to the timer motor
and the drive motor to begin agitation.
Water Level Switch
Tub
Fig. 2-5
Air Dome
Assembly
Hose
Trapped Air In
Hose And Air
Dome Assembly
(Air Pressure)
Typical Water
Level Switch
WATER LEVEL SWITCH
AT FULL POSITION
Closed
Diaphragm
Fig. 2-7
7
Fig. 2-4
P-Contact
Open
V-Contact
T-Contact
Air Pressure
Applied To
Diaphragm
Fig. 2-6