Oven interior light on Insignia range does not turn on when the door is opened or when the light button is pressed.

Safety first: Turn off power at the breaker before replacing the bulb or accessing wiring.

• Replace bulb: Remove the light cover inside the oven, unscrew the bulb, and replace with the correct high-temperature oven bulb (check wattage and base type). Restore power and test.
• Check door switch: Locate the door switch on the frame. Press it manually and listen for a click. Test continuity with a multimeter; replace if it does not change state when pressed.
• Inspect socket and wiring: Check the light socket for corrosion or burned contacts. Repair or replace as needed.
• Control board: If the bulb, switch, and wiring are good, the EOC light relay may be faulty and the board should be replaced.