Oven emits a burning plastic or electrical smell when heating.

Safety First: If the smell is strong or you see smoke, turn off power immediately and do not use the oven until inspected.

• Initial use: For a new Insignia oven, run an empty bake cycle at 400°F (about 200°C) for 30–60 minutes with good ventilation to burn off manufacturing residues.
• Check for packaging: Inspect the oven cavity, drawer, and rear area for any remaining plastic, foam, or tape. Remove all foreign materials.
• Inspect wiring: With power off, remove the rear panel and inspect the wiring harness and terminal block for melted insulation or discoloration. Repair or replace damaged components.
• Control board: Check the electronic oven control board for burnt components. Replace if any damage is found.