SZO578 - Universal Supco Refrigerator Door Gasket, White

SZO578 – Universal Supco Refrigerator Door Gasket, White

The SZO578 Universal Supco Refrigerator Door Gasket, White is a high-quality aftermarket replacement door gasket designed by Supco for select Sub-Zero refrigerators and freezers. Manufactured from refrigeration-grade virgin vinyl with an integrated magnetic seal, this replacement gasket restores an airtight door seal to help maintain proper temperatures, improve energy efficiency, and reduce frost buildup. Appliance Kingdom ships this replacement part across Canada with fast, reliable delivery for homeowners, landlords, and professional appliance repair technicians.

What Does the Refrigerator Door Gasket Do?

The refrigerator door gasket creates an airtight seal between the appliance door and cabinet, preventing cold air from escaping while keeping warm, humid air from entering. A properly sealing gasket helps maintain consistent temperatures, reduces compressor workload, minimizes frost formation, and improves overall energy efficiency.

Over time, door gaskets can become cracked, brittle, warped, or lose their magnetic sealing ability. Replacing a worn gasket helps restore proper cooling performance, protects stored food, and reduces unnecessary strain on the refrigeration system.

Common Symptoms of a Faulty Door Gasket

If your refrigerator or freezer is experiencing any of the following problems, replacing the door gasket may resolve the issue:

• Door does not seal tightly
• Cold air leaking around the door
• Excessive frost or ice buildup
• Moisture or condensation around the door opening
• Refrigerator running longer than normal
• Higher energy consumption
• Interior temperatures not remaining consistent
• Visible cracks, tears, or deformation in the gasket
• Door requires extra force to stay closed

If the gasket is the source of the air leak, replacing it typically restores proper sealing and cooling performance.

Compatibility Guidance

This replacement gasket is intended for compatible Sub-Zero refrigerator and freezer applications.

Before ordering:

• Verify your appliance model number.
• Confirm that SZO578 is specified for your model.
• Contact Appliance Kingdom if you need assistance verifying compatibility before purchase.

Checking compatibility beforehand helps ensure proper fit and optimal sealing performance.

Replaces Part Numbers

Verified replacement part numbers include:

• 3211140
• 7010578

Key Features & Benefits

• High-quality aftermarket replacement manufactured by Supco
• Designed as a direct replacement for compatible Sub-Zero applications
• White finish for an OEM-style appearance
• Refrigeration-grade 100% virgin vinyl construction
• Integrated magnetic seal for a secure door closure
• Helps restore cooling efficiency and reduce energy loss
• Precision-engineered for reliable performance
• Suitable for homeowners, landlords, maintenance professionals, and appliance repair technicians

Installation Overview

Replacing a refrigerator door gasket is generally considered an easy to moderate repair.

Many experienced DIY users can complete the installation using basic household tools. In some cases, warming the gasket before installation can improve flexibility and help achieve a proper seal. After installation, inspect the gasket for uniform contact around the entire door to ensure optimal performance.

If the refrigerator door requires adjustment or alignment, professional service may be recommended.

Canada-Wide Availability & Trusted Canadian Supplier

Appliance Kingdom proudly supplies genuine OEM and high-quality aftermarket appliance parts to customers throughout Canada. Orders ship from Canada, providing dependable service and fast delivery for residential customers, landlords, maintenance professionals, and appliance repair businesses nationwide.

Buyer Confidence & Quality Assurance

When you purchase the SZO578 Universal Supco Refrigerator Door Gasket, you receive:

• Trusted Supco aftermarket quality
• Designed for reliable sealing performance
• Manufactured using durable refrigeration-grade materials
• Confidence in fit when verified for your appliance model
• Expert support from Appliance Kingdom to help confirm compatibility before ordering