SZ4420 - Universal Supco Refrigerator Evaporator

SZ4420 – Supco Refrigerator Evaporator

The SZ4420 Supco Refrigerator Evaporator is a high-quality aftermarket replacement component designed for compatible Sub-Zero refrigerators. Measuring approximately 24 × 16 × 1 inches, this evaporator transfers heat from the refrigeration system to support proper cooling performance. It is designed as a service replacement for specified Sub-Zero refrigerator applications.

Available through Canadian appliance parts suppliers, the SZ4420 is intended for homeowners, property managers, and professional appliance technicians repairing refrigerator cooling problems. Please note that Supco lists this model as no longer available, so confirm current stock and availability with Appliance Kingdom before ordering.

Function & Importance of the Refrigerator Evaporator

The evaporator is a key component of a refrigerator's sealed refrigeration system. Refrigerant absorbs heat as it passes through the evaporator, helping the appliance maintain the temperatures required to preserve food.

A correctly specified replacement evaporator is important for effective heat transfer, dependable cooling, and proper refrigeration system operation. Incorrect dimensions or refrigerant-system specifications can compromise performance.

Common Symptoms of a Faulty Refrigerator Evaporator

Problems associated with the evaporator or its surrounding refrigeration system may include:

• Refrigerator compartment not cooling adequately

• Freezer compartment too warm

• Refrigerator or freezer becoming excessively cold

• Excessive frost buildup

• Refrigerator running for unusually long periods

• Cooling system failing to start or maintain normal operation

These symptoms do not necessarily indicate a defective evaporator. Other refrigeration components, refrigerant leaks, airflow restrictions, or defrost-system faults can produce similar problems. A qualified technician should diagnose the appliance before replacing this component.

Will Replacing the SZ4420 Fix My Refrigerator?

Replacing the evaporator can resolve a cooling problem when testing confirms that the original evaporator is defective and the SZ4420 is the correct replacement for the appliance. However, symptoms such as poor cooling or frost buildup can have other causes, so diagnosis is recommended before ordering.

Compatibility & Ordering Guidance

The SZ4420 is designed for specified Sub-Zero refrigerator applications. Supco identifies the following compatible model families:

• 511

• 532

• 590

• 611

• 632

• 690

• 695-2

For model 695-2, Supco specifies use before serial number 2269189. Verify the complete appliance model and serial number against the manufacturer's parts information before ordering.

Replaces Part Numbers

Supco's product information identifies the following replacement part numbers:

• 3130260PR

• 4204420PR

These references should be checked against the appliance's model-specific parts documentation before purchase.

Key Features & Benefits

• Supco aftermarket refrigerator evaporator

• Part number: SZ4420

• Approximate dimensions: 24 × 16 × 1 inches

• Designed for specified Sub-Zero refrigerator applications

• Intended to restore refrigeration heat-transfer performance when the original evaporator requires replacement

• Suitable for appliance repair technicians and experienced refrigeration professionals

• Provides a documented alternative for specific compatible service applications

Installation Overview

Evaporator replacement is an advanced refrigeration repair. The procedure involves the sealed refrigerant system and may require refrigerant recovery, brazing, evacuation, leak testing, and refrigerant recharging.

Installation should be performed by a qualified refrigeration technician with the appropriate equipment and authorizations. Do not attempt to open or service the sealed refrigerant system without the required training.

Canada-Wide Availability & Appliance Kingdom Support

Appliance Kingdom serves Canadian customers looking for appliance replacement parts, including homeowners, landlords, and professional repair technicians.

The SZ4420 is listed as discontinued by its manufacturer, so current availability must be confirmed before purchase. Contact Appliance Kingdom with your appliance's model and serial numbers to help verify compatibility and available replacement options.