An oven or microwave error code (often an F-code like F2, F9 or F10) usually means a temperature sensor, door lock or control board problem. A power reset clears some codes, but a code that returns usually needs a part replaced.
These guides cover GE, LG, KitchenAid, Frigidaire and Samsung ovens, ranges and microwaves. Each explains what the code means, how to check the likely causes, how to reset the appliance and when to stop and call a technician. Gas range guides include gas safety steps, and all code meanings are checked against official documentation.