Control Board; Control Thermal Cutout (Tco) - GE GDWT668V Technical Service Manual

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.

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
Panel.)
2. Remove the T-15 torx screw from the control
TCO.
Note: When replacing the control TCO, splice a new
thermostat into the harness using connectors and
procedures approved for damp/wet conditions.
Silicone Grease

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
Locator View
measured across wires J3, pin 2 (dark blue wire), and
J3, pin 3 (gray wire).
Outer Door
To remove the control board:
1. Remove the control TCO. (See
2. Disconnect the 4 wire harnesses from the
Control TCO
3. Remove the Phillips-head screw holding the
– 22 –
Control Board Connector
.) A pulsed 2-VDC signal should be
Control Board
YB
1
NX
TURBIDITY/
2
TEMPERATURE
SX
3
SENSOR
J3
OX
4
control board.
Disconnect
control board to the inner door panel.
Turbidity Sensor
1
NTC
2
RECEIVER EMITTER
3
TRANSMITTER
CATHODE
4
Vcc
Control TCO.)
Disconnect
Disconnect
(Continued next page)