Sub-Zero 4202160 Freezer Drain Heater Kit – 550 SVCE

The Sub-Zero 4202160 Freezer Drain Heater Kit is the genuine OEM solution engineered to prevent drain freeze-ups and ice accumulation in select Sub-Zero freezer models. Over time, insufficient drain heating can lead to blocked drain passages, water overflow, and ice buildup in the freezer floor. This heater kit restores correct drainage performance by supplying consistent thermal output to the drain trough.
This kit is compatible only with specific serial ranges across the 611, 650, 511, and 550 model families. Sub-Zero implemented several design changes across production, making accurate serial verification essential before ordering.
If your freezer is developing ice in the drain area, leaking water, or failing to defrost properly, replacing the drain heater is the recommended service action to restore reliable operation.

⚠️ If you are uncertain about compatibility with your model, please provide your unit’s serial number for verification.