Sub-Zero
Lighting Stuck On – Door Switch or Control Fault
Interior lights stay on even when the door is closed; cabinet may warm up.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Stuck or misaligned door switch, Door not closing fully, Shorted light relay on control board, Misadjusted door hinges
How to Fix / Troubleshooting
Safety first: Disconnect power before adjusting switches or hinges.
Step 1 – Verify door closure
- Check that nothing is obstructing the door from closing fully.
- Adjust shelves or bottles that may be interfering.
Step 2 – Inspect door switch
- Ensure the switch is depressed when the door is closed.
- Adjust or replace the switch if it does not change state.
Step 3 – Hinge adjustment
- Adjust hinges so the door aligns properly with the cabinet and compresses the gasket evenly.
Step 4 – Control board
- If lights remain on with a known‑good switch, the control board’s light relay may be stuck and require board replacement.
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Repair Difficulty
Medium
3/5
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