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Control Thermal Cutout (TCO)
The control TCO is one shot with a trip temperature
of 250°F. If the control TCO trips, no voltage is
supplied to the control board or components.
Look for control or wire damage and replace as
necessary.
To remove the control TCO:
1. Remove the outer door panel. (See
Outer Door
Panel.)
2. Remove the T-15 torx screw from the control
TCO.
Silicone Grease
Note: When replacing the control TCO, splice a new
thermostat into the harness using connectors and
procedures approved for damp/wet conditions.
Control Board
The control board is attached to the right side of the
inner door panel.
Voltage from the control board to the turbidity
sensor can be tested by checking the voltage at J3
on the control board. (See
Control Board Connector
Locator View
.) A pulsed 2-VDC signal should be
measured across wires J3, pin 2 (dark blue wire), and
J3, pin 3 (gray wire).
Disconnect
Disconnect
Disconnect
3. Remove the Phillips-head screw holding the
control board to the inner door panel.
(Continued next page)
To remove the control board:
1. Remove the control TCO. (See
Control TCO.)
2. Disconnect the 4 wire harnesses from the
control board.
1
2
3
4
TURBIDITY/
TEMPERATURE
SENSOR
J3
1
2
3
4
NTC
RECEIVER EMITTER
TRANSMITTER
CATHODE
Vcc
YB
NX
SX
OX
Control Board
Turbidity Sensor
Control TCO
10. Repeat steps 1 thru 9 one time.
11. Repeat steps 1 thru 6. When the CLEAN LED
illuminates, the system is purged and ready to
be refi lled with the correct detergent.