Wine cooler interior light stays on all the time, even when the door is closed.

Safety: Unplug the unit before working on the door switch or control board.

Steps:

• Check door closure: Ensure the door fully closes and presses the switch (for mechanical types).
• Test door switch: Remove and test continuity; it should change state when pressed or when a magnet is applied (reed type). Replace if it does not.
• Inspect wiring: Look for shorts that could be feeding constant power to the light.
• Main PCB: If the switch is good but the light remains on, the light driver on the main board may be shorted. Replace the main control board.