The refrigerator or freezer compartment has heavy frost on the walls, ceiling, or food items.

Safety first: Unplug the unit if you need to remove panels or use heat to clear frost.

Step 1 – Inspect door closure

• Check that nothing is blocking the door from closing fully (food packages, shelves, bins).
• Verify that the door closes smoothly and latches without needing to be pushed hard.

Step 2 – Examine door gaskets

• Look for tears, gaps, or hardened sections in the door gasket.
• Use a flashlight inside the compartment with lights off in the room; look for light leaks around the door.

Step 3 – Adjust or replace gasket

• Warm the gasket with a hair dryer on low and gently reshape it to improve sealing.
• If the gasket is damaged or will not seal, replace it with an OEM Sub-Zero gasket.

Step 4 – Defrost and dry

• Manually defrost heavy frost by unplugging the unit and leaving doors open until ice melts.
• Dry all surfaces before restarting.