Pressure Sensor - Ffle3911Qw And Fflg4033Qw; General Characteristics - Frigidaire FFLE3911QW Technical & Service Manual

9.11 Pressure Sensor
- FFLE3911QW and
FFLG4033QW

9.11.1 General Characteristics

The Pressure Sensor is an analogue device that controls the
water level in the tub, used in models with electronic control
system, and it is directly connected to the Main Control
Board.
A tube is connected between the bottom of the Tub and the
Pressure sensor.
Wiring Diagram - FFLE3911QW and FFLG4033QW
When the tub is filled with water,
it creates a pressure inside the
hydraulic circuit that causes the
membrane to change position. This
in turn modifies the position of the
core inside the coil, thus changing
the inductance and the frequency of
the oscillating circuit.
The Main Control Board recognizes how much water
has been filled into the tub according to the frequency.
Operating frequency varies according to the quantity of
water in the tub.
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