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

shows SF.

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.