Interior light stays on even when the door is closed, causing warming inside

Safety: Unplug the unit before adjusting the switch or wiring.

• Check door switch alignment: Ensure the door fully depresses the mechanical switch or aligns with the magnetic reed switch when closed.
• Test switch: Use a multimeter to check that the switch opens when the door is closed. Replace if it remains closed.
• Inspect magnet (for reed switch): Verify the magnet is present and properly positioned in the door frame.
• Control board evaluation: If the switch operates correctly but the light remains on, the control board's light relay may be stuck and require replacement.