Diodes - GE GYE18JBL Technical Service Manual

Main Board
• J7 pin 3 (yellow) - J7 pin 9 (orange): 120
VAC
The icemaker supplies the voltage to the
icemaker valve and isolation valve. To test the
icemaker valve, cycle the icemaker. Voltage
checks can be performed at the dual valve
connector. If the dual valve is getting voltage but
no water, ensure isolation valve is working.
Icemaker Valve
• White - orange: 120 VAC
Dual Valve Removal
1. Remove the water tank cover.
2. Pull the clips from the collars of the water
valve.
Collar
Clip
3. Push in on the collars on the water valve
while pulling the water lines out to remove the
lines from the dual valve.
4. Remove two Phillips-head screws.
5. Disconnect the 4-pin water valve connector.

Diodes

The isolation valve is shared between the
dispenser and icemaker valves circuits; diodes
are used to prevent voltage from the main board
going to the valve not intended to be energized.
The diodes are part of the dual valve harness
attached to the dual valve solenoids. Should one
of the diodes fail, replace the dual valve.
Diode Diagnosing
When a diode fails, it can either open or short.
If one of the diodes should open, the isolation
valve will not receive power for one of the water
operations. If one of the diodes should short,
one of the water operations will cause both the
icemaker and dispenser valve to activate.
Collar
– 32 –
Diodes