Oven interior light does not work, but all other functions are normal.

Safety first: Switch off power and allow the oven to cool. Glass and metal parts may be hot.

Steps to check:

• Replace bulb: Remove the glass lamp cover inside the cavity, unscrew the old bulb, and fit a new high-temperature-rated Tower-compatible oven bulb.
• Holder check: If the new bulb does not work, test for voltage at the lamp holder (only if you are competent and with appropriate safety). If no voltage, the issue may be with the control board or wiring.