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Note: The 2 sensor rods in the air duct assembly are
not replaceable. To replace the sensor rods, replace
the air duct assembly. (See Air Duct Assembly.)
• The sensor rods are connected to the
main control board. The rods are spaced
approximately 1/2-in. apart, creating an open
circuit to the control.
• The control board utilizes a low-voltage
capacitor that is located in the wire harness
near the sensor rods and can be replaced as a
separate component.
• The capacitor 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 This low resistance discharges
the capacitor.
• As the clothes become dry, their resistance
value increases and the charge across the
capacitor builds to approximately 5 VDC.
• Proper leveling of the dryer is vital for accurate
sensor drying. If the front of the dryer is raised
too high, clothes will tumble toward the rear of
the drum, preventing contact with the sensor
rods. This could produce a false dryness reading.
Moisture Sensor
The moisture-sensing circuit consists of 2 sensor
rods. They are mounted beneath the lint fi lter on the
drum side of the air duct.
• Empty drum detection is not required for these
models. The control shall run for the minimum
dry time if no load is present.
The dryer will signal when the clothes are at 17%
moisture level if equipped with a damp signal that
has been selected.
Approximate values for dryness level:
Damp = 17%
Less dry = 10%
Dry = 2-6%
More dry = <2%
Operation of the moisture sensor can be checked by
using service test mode t8. (See Service Test Mode.)
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