To replace the light bulb in a Sub-Zero 611 refrigerator, follow these steps:
1. Turn off the power: Unplug the refrigerator or turn off its circuit breaker to ensure your safety.
2. Locate the light bulb cover: The light bulb is typically covered by a plastic or glass cover inside the refrigerator compartment.
3. Remove the cover: Gently twist or pry off the cover to access the bulb.
4. Remove the old bulb: Carefully unscrew the old bulb counterclockwise from its socket.
5. Install the new bulb: Screw the new bulb clockwise into the socket.
Replace the cover: Put back the light bulb cover and ensure it is securely in place.
6. Turn on power: Restore power to the refrigerator.
If you are unsure about the process or have any concerns, it's best to refer to the refrigerator's manual or contact a professional technician for assistance.