Oven shows E12 and interior light does not work, or trips when turned on.

Safety first: Turn off power and allow the oven to cool. Glass components may be hot.

Steps to check:

• Remove lamp cover: Unscrew or unclip the glass lamp cover inside the cavity.
• Check bulb: Remove the bulb and inspect for broken filament or blackening. Replace with the correct Tower-specified oven lamp (typically 25–40 W, high-temperature rated).
• Holder inspection: Inspect the lamp holder for signs of arcing, burning, or cracks. If damaged, the holder must be replaced from the rear of the oven.
• Wiring: From the rear, check the lamp wiring for insulation damage or shorts to the metal cabinet.

Warning: Only use high-temperature oven-rated bulbs. Standard household bulbs can fail quickly or shatter.