GE PFWS4400L0, Technical Service Manual

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To remove the control board assembly:
1. Remove the control panel. (See
Control Panel
.)
Note: In the following step, the knob is held in place
by 4 plastic clips and may require some effort to
remove.
2. Remove the knob by pulling it straight out.
3. Remove the fi ve 6-mm hex-head screws that
hold the control board assembly to the control
panel.
4. Remove the control board assembly from the
control panel.
5. Remove the cycle selection buttons.
Tab Tab
Disconnect
Guide
Guide
Line Filter
The line fi lter helps to smooth out any fl uctuations in
voltage, protecting the control board and providing
more reliable operation. The line
fi lter is installed on
the interior side of the rear panel and is located left
of the water valve.
To check the line fi lter, look for the outer surface
to be burnt by heat or a power surge. The fi lter
resistance should be approximately 0

between
the black (top) wire terminals and 0

between the
white (bottom) wire terminals.
To remove the line fi lter:
1. Remove the top panel. (See
Top Panel
.)
2. Remove the single black (top) and single white
(bottom) wires.
3. Disconnect the wire harness by pressing the tab
and pulling outward.
Note: The ground wires attached to the line fi lter
have release/locking tabs.
4. Press the locking tab on each terminal and
remove the 2 ground wires (green and yellow/
green). Disconnect the black and white wires
and the 4-pin connector
VFD (Vacuum Fluorescent Display)
To remove the VFD:
1. Remove the control panel. (See Control Panel .)
2. Disconnect the wire harness from the VFD.
3. Press the 2 tabs that hold the VFD to the control
panel and remove the VFD from the 2 guides.
(Continued Next Page)
ELECTRICAL TERMINAL
RELEASE/LOCKING TAB
Electrical Terminal
Release/Locking Tab
Disconnect
Disconnect
Disconnect
Ground
Wires