One Stop Solutions 98009 HVAC Heater Core - Rear

OE-Style Heater Core for Ford and Mercury Applications

Restore cabin heat with this OSC Premium new HVAC heater core, part number 98009. It is built to match original equipment form and function for select Ford, Lincoln, and Mercury vehicles, including Explorer, Explorer Sport Trac, Mountaineer, Freestar, Excursion, Expedition, Aviator, and Windstar applications.

Made from premium aluminum and individually pressure tested, this heater core is built for direct replacement service in rear HVAC and standard heater core locations. The aluminum tube construction and included foam and accessories support a clean installation and proper sealing in the HVAC case.

Key Features

• German engineered for long service life and consistent heating performance
• Large-bore design for greater fluid capacity
• Premium aluminum construction with cadmium-plated tubes inside and out to resist premature failure
• Individually pressure tested before shipment
• Includes necessary foam and accessories for installation
• Direct replacement for copper-designed heater core applications

Detailed Product Overview

The OSC Premium 98009 heater core is engineered as an OE-style replacement for vehicles that need dependable heat transfer and stable coolant flow through the HVAC system. Its aluminum construction helps modernize the original copper-style design while maintaining the form and function required for proper fitment. This part cross-references APDI 9010020 and Spectra Premium 93009 for the same application.

Compatible with 2002-2010 Ford Explorer, 2007-2010 Ford Explorer Sport Trac, 2008-2010 Mercury Mountaineer, 2004-2007 Ford Freestar, 2002-2007 Mercury Mountaineer, 2000-2005 Ford Excursion, 2003-2005 Ford Expedition, 2003-2005 Lincoln Aviator, and 1998-2003 Ford Windstar rear HVAC applications. The 98009 is also a practical choice for Ford Explorer and Mercury Mountaineer owners replacing a leaking or restricted heater core.

Common Problems This Part Can Address

• Weak or inconsistent cabin heat
• Coolant odor inside the vehicle
• Coolant seepage from the HVAC core area
• Restricted coolant flow through the heater circuit
• Heat loss in rear HVAC systems on larger Ford and Mercury vehicles

Installation Notes

Verify the vehicle’s HVAC configuration and rear or standard heater core location before installation. Inspect coolant hoses, seals, and the HVAC case for wear or contamination while the system is open. Proper coolant refill and air bleeding are important after replacement to help the heater core operate correctly.

Quality Assurance

Each OSC Premium heater core is pressure tested individually to confirm integrity before use. The aluminum construction, plated tubes, and OE-style design support reliable replacement performance in demanding Ford, Lincoln, and Mercury heating systems.