GEAppliances CFE28TSH Technical Service Manual page 36

When a K-Cup® beverage size is selected both hot
water tank valves open and the water in the hot
water tank begins heating. Water heating time will
depend on the temperature of the water in the tank.
The hot water tank has a 1200 watt heating
element that is controlled by the door board and
the feature board. Depending on the cooling needs
of the refrigerator the water may heat on low at
600 watts. When low heat is used the message "
displayed at the bottom of the screen.
When heating water a relay on the door board
closes to supply 120 VAC from the door board J8-2
to the Feature Board J203-2. Low heat is used
when the compressor, icemaker or defrost heater
is energized to keep total current within energy
To produce 600 watts, low heat, from a 1200 watt
heater, 120 VAC is passed through a diode on the
Feature Board resulting in 60 VAC output from J203-
1 to ORANGE neutral. (Wiring Diagram 1)
For 1200 watts, High heat, a relay on the Feature
Board closes, bypassing the diode resulting in 120
VAC from J203-1 to ORANGE neutral on the Feature
Board. (Wiring Diagram 2)
High heat is referred to in diagnostics as '
When water is hot and the
hot water is ready to be dispensed. The knob is
turned counterclockwise and pushed in and held to
dispense the hot water.
As the water is dispensed it passes through the
venturi that creates suction pulling the water out
of the upper chamber until the check ball rests on
its gasket preventing air from being drawn into the
water from the vent.
dip tube to enter the lower chamber at the bottom.
As the cold water enters the bottom it forces the
hot water out of the outlet port at the top left of the
tube from the Hot Water tank to the outlet in the
water stops dispensing the water in the outlet tube
is higher than the tank outlet port so the weight of
to the
" will be
collect the excess water in the upper chamber. This
the water returning to the tank prevents drips at the
recess.
When water is hot the Ready screen appears.
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