Interior light stays on even when the door is closed, causing heating inside the cabinet.

Safety first: Unplug the unit before inspecting the door switch or control board.

Steps to check and fix:

• 1. Check door alignment: Ensure the door fully closes and properly actuates the switch plunger or magnet.
• 2. Test door switch: Remove and test the switch with a multimeter. Replace if it does not open when the door is closed.
• 3. Inspect wiring: Look for pinched or shorted wires near the light assembly.
• 4. PCB diagnosis: If the switch and wiring are good but the light remains on, the control PCB may have a shorted light driver. Replace the main PCB if necessary.