Four Seasons 98783 HVAC Heater Core - Rear

Heater Core for Rear HVAC Service

The Four Seasons 98783 heater core is an aluminum replacement built for rear HVAC service in Ford vans and wagons. It is specified to meet or exceed OEM requirements and is sized for direct-fit applications where dependable cabin heat is needed.

Compatible With rear heater core applications on Ford E-350 Super Duty, E-150, E-250, Econoline Van, Econoline Wagon, E-150 Econoline, E-350 Econoline, Econoline, E-150 Club Wagon, E-350 Club Wagon, E-150 Econoline Club Wagon, E-250 Econoline, E-350 Econoline Club Wagon, and Windstar models listed below.

Key Features

• Brand: Four Seasons Heater Core
• Part number: 98783
• Aluminum heater core construction
• Core dimensions: 7-5/8 in. length, 6 in. width, 1-7/8 in. thickness
• Core height: 7.625 in.; core width: 6.000 in.; core depth: 1.875 in.
• Tube size: 0.625 in. on both connections
• Meets or exceeds OEM specifications
• Rear position application

Detailed Description

Four Seasons 98783 is an aluminum HVAC heater core for rear heating systems in select Ford E-Series and Windstar applications. The compact core dimensions and 0.625-inch tube connections support proper fitment in the rear HVAC case, while the OEM-level specification helps maintain factory-style heat transfer performance. This part is a practical choice when replacing a leaking, restricted, or inefficient heater core in Ford E-350 Super Duty, E-150, and E-250 rear heater systems.

This part cross-references Spectra Premium 94783 for the same application.

What It Is Used For

• Restoring weak or uneven rear cabin heat
• Replacing a heater core with coolant seepage or leakage
• Addressing restricted coolant flow through the rear HVAC circuit
• Correcting fogging or sweet coolant odor caused by heater core failure
• Returning rear HVAC heating performance in Ford van and wagon platforms

Installation Notes and Tips

Verify the rear HVAC case layout, tube orientation, and core dimensions before installation. Drain the cooling system, disconnect the heater hoses carefully, and inspect the rear HVAC housing, seals, and hoses for wear or contamination. After installation, refill the cooling system and bleed air thoroughly to help prevent poor heat output or trapped-air noise.

Quality Assurance

Four Seasons lists this heater core as meeting or exceeding OEM requirements. The aluminum construction and application-specific sizing support a factory-style replacement for the listed Ford rear heater core applications.

Vehicle Fitment

• Fits 1999-2016 Ford E-350 Super Duty, rear.
• Fits 2002-2014 Ford E-150, rear.
• Fits 2003-2014 Ford E-250, rear.
• Fits 2010-2014 Ford Econoline Van, rear.
• Fits 2010-2014 Ford Econoline Wagon, rear.
• Fits 2007-2008 Ford E-150 Econoline, rear.
• Fits 1992-2002 Ford E-150 Econoline, rear.
• Fits 2007-2008 Ford E-350 Econoline, rear.
• Fits 1992-2000 Ford E-350 Econoline, rear.
• Fits 1999-2006 Ford Econoline, rear.
• Fits 2003-2005 Ford E-150 Club Wagon, rear.
• Fits 2002-2005 Ford E-350 Club Wagon, rear.
• Fits 1992-2002 Ford E-150 Econoline Club Wagon, rear.
• Fits 1992-2002 Ford E-250 Econoline, rear.
• Fits 1992-2002 Ford E-350 Econoline Club Wagon, rear.
• Fits 1995-1996 Ford Windstar, rear.