Interior light stays on even when the door is closed, causing extra heat inside.

Unplug the cooler before working on the door switch or wiring.

Steps:

• Check door alignment: Ensure the door fully presses the switch plunger when closed. Adjust hinges if necessary.
• Test switch: Press the switch manually with the door open; the light should turn off. If it does not, the switch or board may be faulty.
• Replace switch: Remove and replace the door switch if it is stuck or has no continuity when operated.
• Board issue: If a new switch does not fix the problem, the main control board light circuit may be stuck on and require replacement.