The 4200520 (also referenced as SZ4200520) is the OEM Sub-Zero refrigerator ice maker assembly. This unit has been discontinued by the manufacturer and is no longer available through OEM channels. Please contact us to discuss available alternatives.

✓ Model-Specific Repair Pages

Don't see your model? Contact us — we may be able to source an alternative ice maker for your Sub-Zero refrigerator.

The 4200520 ice maker assembly mounts inside the freezer compartment and automatically produces ice by filling the ice mold with water, freezing it, and harvesting the cubes into the ice bin on a timed cycle. As this part is NLA, contact us for current alternative options.

✓ Common Symptoms Fixed

The 4200520 ice maker was the OEM solution for the following issues:

• Ice maker not producing ice
• Ice maker stopped cycling after a period of normal operation
• Ice cubes coming out misshapen, hollow, or undersized
• Water overflowing from the ice mold into the freezer
• Ice maker harvest arm stuck or not moving

✓ Key Features & Specifications

• OEM Sub-Zero part number: 4200520 / SZ4200520
• Status: Discontinued — No Longer Available (NLA)
• Complete ice maker assembly — includes mold, harvest motor, thermostat, and control module

✓ Buying Options

OEM (4200520): This part is discontinued and no longer available through OEM channels. Contact XPart Supply or call 833-899-7278 to discuss available alternatives.

✓ Replacement Part Numbers

No known superseding part number on file. Contact us for current alternatives.

✓ Installation Tips

• Disconnect power to the refrigerator before beginning.
• Shut off the water supply valve to the refrigerator.
• Open the freezer and locate the ice maker mounted to the freezer wall.
• Disconnect the wiring harness connector and the water supply line from the existing ice maker.
• Remove the mounting screws and pull the old ice maker free from the bracket.
• Mount the replacement assembly to the bracket, reconnect the wiring harness and water supply line.
• Restore water and power, then allow 24 hours for the ice maker to complete its first full harvest cycle.