If you’ve accidentally switched the oven control on your GE oven from Fahrenheit to Celsius (or vice versa), it can seem like an oven control problem; the keypad will accept some temperature selections and not others. Easy enough to switch back to the way you want it– this excerpt from your owner’s manual explains the technique:
Your oven control is set to use the Fahrenheit
temperature selections but you may change this
to use the Celsius selections.
Press the BAKE and BROIL HI/LO
pads (on double oven models use
the upper oven controls) at the same
time for 3 seconds until the display
Press the BROIL HI/LO pad. The
display will show F (Fahrenheit).
Press the BROIL HI/LO pad again. The
display will show C (Celsius).
Press the START pad.
NOTE: On double oven models the new setting
will be displayed for both ovens.