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Sub-Zero 4203810 Kit Mullion Chute Heater Service – OEM Replacement

Sub-Zero

4203810

220.93

The Sub-Zero 4203810 Mullion Chute Heater Kit is a genuine OEM replacement part designed to maintain optimal performance in Sub-Zero refrigerators. This heater helps prevent condensation and frost buildup in the mullion chute area, ensuring consistent cooling efficiency and reliable operation.
Compatible with Sub-Zero models 590, 680, 690, 685-2, 695-2, 685-3, and 695-3, this service kit includes all necessary components for proper installation and long-term durability.

⚠️ If you are unsure about compatibility with your specific unit, please provide your model and serial number for verification.

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PARTS HELP

Frequently Asked Questions

Find clear answers about genuine OEM Sub-Zero, Wolf, and Cove replacement parts, compatibility verification, shipping, returns, and order support before you place an order.

Do you sell genuine OEM Sub-Zero, Wolf, and Cove replacement parts?

Yes. SubZeroParts.com focuses on genuine OEM replacement parts for Sub-Zero, Wolf, and Cove appliances. Our catalog includes parts for refrigerators, freezers, wine storage units, ice makers, ranges, ovens, cooktops, ventilation products, and other compatible appliance models.

How do I know if a part fits my appliance?

The best way to confirm fit is to check your appliance model number and serial number before ordering. Many Sub-Zero, Wolf, and Cove parts change by serial range, production version, or model variation. If you are not sure, use the Check Fit form and send us your model number, serial number, part number, and photos if available.

Why is the serial number important when ordering appliance parts?

A serial number can determine whether your appliance uses the current part number, an earlier version, or a different service replacement. Two appliances with the same model number may require different parts depending on the production range. Checking the serial number helps reduce incorrect orders, delays, and unnecessary returns.

Can you help me identify the correct part before I order?

Yes. If you are not 100% sure which part fits your appliance, send us your appliance details through the Check Fit form. Include the model number, serial number, part number if known, and clear photos of the part or rating plate. Our team will review the details and help you identify the correct compatible replacement part.

Do you ship Sub-Zero and Wolf parts across the United States?

Yes. We ship replacement parts to customers across the United States. Shipping options, delivery time, and availability may vary depending on the part, destination, carrier service, and current inventory status. Some large, fragile, or special-order items may require additional handling time.

What should I do if I already placed an order and need help?

If you already placed an order, use the Order Help form and include your order number, email address, and a short description of the issue. We can help with order status, tracking, shipping questions, returns, damaged items, wrong items, or compatibility questions related to your order.

Can I return a part if it does not fit?

Return eligibility depends on the item condition, product type, timing, and our return policy. Before ordering, we strongly recommend verifying compatibility by model and serial number. Electrical parts, installed parts, special-order items, or opened items may have restrictions. Please review the return policy before submitting a return request.

Are Sub-Zero and Wolf part numbers always the same as previous numbers?

Not always. Many OEM parts have current part numbers, previous numbers, replacement numbers, or service kit numbers. A previous number may be replaced by a newer part, but compatibility still depends on the appliance model and serial number. Product pages on SubZeroParts.com list current and previous numbers whenever available.

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Please enter your details below to finalize your order. We specialize in genuine Sub-Zero, Wolf & Cove replacement parts and can help verify compatibility before shipment using your model and serial number.

Not sure this is the correct part? Contact our team before placing your order — we’ll be happy to help.

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Example: BI-48SID/O, 650, 736TCI, DF366, GR366

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Sub-Zero and Wolf parts may vary by exact model, serial number range, and production version. Providing your model and serial number helps us review compatibility before shipment when possible.

I confirm that I have verified the model and serial number for compatibility.

It seems like you're unsure about the model or serial number. To ensure you receive the correct part, we strongly recommend verifying this information before placing your order. You can find the serial number on your appliance using our guide jump to the manual. If you need further assistance, please contact us, and our team will help you find the correct part for your Sub-Zero appliance.

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After placing your order, you will receive a confirmation email with your order details. Most orders are processed within 1–2 business days according to our Shipping Policy. Tracking information will be provided once your order ships.

To help you order with confidence, please verify your model number, serial number, and part number before placing the order. If you are unsure whether this part fits your appliance, contact our team before shipment and we can help review compatibility.

Most unused parts in original manufacturer packaging may be returned within 30 days. Some electronic, installed, opened, special-order, discontinued, or non-stock parts may have limited return eligibility. Shipping charges may be non-refundable unless the return is due to our confirmed error.

By placing your order, you agree to our Return Policy, Shipping Policy, and Terms of Service.

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