Four Seasons 90009 HVAC Heater Core - Rear

Reliable HVAC Heater Core for Ford, Lincoln, and Mercury Vehicles

The Four Seasons Heater Core 90009 is designed to restore efficient heating performance in select Ford, Lincoln, and Mercury models. Engineered with durable aluminum construction, this heater core ensures consistent heat transfer and long-lasting operation for your vehicle's HVAC system.

• Core dimensions: 5-7/8 inches length, 6-5/8 inches width, 1-7/8 inches thickness
• Constructed from corrosion-resistant aluminum material
• Core depth of 1.875 inches and height of 5.875 inches for precise fitment
• Tube diameter: 0.625 inches (15.875 mm) for both inlet and outlet tubes
• Meets or exceeds OEM specifications for reliable performance

Four Seasons Heater Core Product Line Overview

The Four Seasons Heater Core line focuses on delivering quality replacement heater cores that match or exceed original equipment standards. The 90009 model is part of this line, featuring aluminum core construction that provides efficient heat exchange and durability. This product line is engineered to maintain proper HVAC function and comfort in your vehicle.

Detailed Product Description and Specifications

This HVAC heater core is specifically designed for compatibility with Ford, Lincoln, and Mercury vehicles including models such as the Aviator, Excursion, Expedition, Explorer, Explorer Sport, Explorer Sport Trac, Freestar, Mountaineer, Navigator, and Windstar. The aluminum core material offers resistance to corrosion and enhances heat transfer efficiency. With core dimensions of 5-7/8 inches in length, 6-5/8 inches in width, and 1-7/8 inches in thickness, the heater core fits precisely within the HVAC housing. Both inlet and outlet tubes measure 0.625 inches in diameter, ensuring proper coolant flow. The Four Seasons part number 90009 confirms exact fitment and quality standards.

Common Applications and Issues Addressed

• Restores heating function in HVAC systems for Ford Aviator and Lincoln Navigator
• Resolves coolant leaks within the heater core assembly
• Eliminates insufficient cabin heat in Mercury Mountaineer and Ford Explorer models
• Prevents engine overheating caused by heater core blockages
• Replaces corroded or damaged heater cores in Expedition and Excursion vehicles

Installation Notes and Tips

When installing the Four Seasons Heater Core 90009, ensure the vehicle is properly drained of coolant before removal of the old heater core. Verify the core dimensions and tube sizes match the original part to avoid fitment issues. Handle the aluminum core carefully to prevent damage to the fins and tubes. Refill the cooling system and check for leaks after installation to confirm proper sealing and operation.

Quality Assurance and Warranty Information

The Four Seasons Heater Core 90009 meets or exceeds OEM specifications, providing reliable performance and durability. Manufactured with corrosion-resistant aluminum, this heater core is built to withstand typical operating conditions. Please refer to Four Seasons warranty terms for coverage details.