GE GFDN240ELWW, Service Manual

Page: 44 / 111

Copyright 2011
44
Disassembly – Moisture Sensor
The sensor rods are connected to
the main control board. The rods
are spaced approximately ½-in.
apart, which creates an open
circuit to the control.
The control board utilizes a low-
voltage capacitor that charges to
approximately 5 VDC when the
circuit is open and discharges to
less than 1 VDC when the circuit
is shorted.
When wet clothes tumble across the two rods, the clothes create a very
low resistance between the rods, which discharges the capacitor.
As the clothes become dry, their resistance value increases and the
charge across the capacitor builds to approximately 5 VDC.