F3 on a GE / Hotpoint
microwave means you have a shorted membrane keypad.
On this model, the membrane keypad is not available as a separate part, so you
would have to order the control panel frame assembly which comes with a new
keypad.
It's actually a pretty easy do it yourself
job.
A video is available
here showing how to remove a
typical over the range control panel assembly in under 5 minutes.
If you have any trouble
getting the grille off once the screws are removed, slide the hood vent grille
to the left about 1/4", then then pull it forward. On some models there are
L-shaped clips that fit into a slot to hold bottom of the vent.
Next, disconnect the keypad strip as shown in
the photo below, then remove the screws that hold your circuit board in the old
frame.
Then carefully (since the display is made
of glass) move your circuit board to the new frame, and reassembly is the
reverse of disassembly.
The part number to order is
WB07X11054
and you can get it from
the Pros
here.
You can also find helpful exploded view
diagrams at that link.
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