Four Seasons 98700A HVAC Heater Core

Four Seasons 98700A Heater Core Overview

The Four Seasons Heater Core 98700A is an aluminum HVAC heater core built for direct replacement in select Ford, Mazda, and Bronco II applications. It is engineered to meet or exceed OEM requirements and supports dependable cabin heat transfer in vehicles such as the Ford Ranger, Ford Explorer, and Mazda Navajo.

Four Seasons Heater Core line products focus on application-specific HVAC replacement parts, and this aluminum heater core follows that approach with OE-style dimensions and tube sizing for a proper fit in the listed vehicles.

Key Features

• Aluminum heater core construction
• Meets or exceeds OEM specifications
• Core dimensions: 7-1/2 in. length, 6 in. width, 1-7/8 in. thickness
• Core height: 7.5 in.; core width: 6 in.; core depth: 1.875 in.
• Tube size: 0.625 in. / 15.875 mm on both connections
• Adjustable pipe positioning: No
• Direct-fit HVAC heater core replacement for listed Ford and Mazda vehicles

Detailed Description

Four Seasons 98700A is an aluminum heater core designed for HVAC systems that require a compact OE-style core with fixed pipe positioning. Its dimensions and tube sizes support proper integration in the heater box, helping restore heat output in applications including 1983-1988 Ford Ranger, 1984-1988 Ford Bronco II, 1989-1994 Ford Ranger, 1991-1994 Ford Explorer, and 1991-1994 Mazda Navajo. This part number, 98700A, also cross-references APDI 9010244 for the same application.

Compatible vehicle coverage includes 1994 Mazda B2300, 1994 Mazda B3000, 1994 Mazda B4000, and 1995 Ford Ranger. The aluminum core design supports efficient heat exchange and is suited for replacement of a leaking, restricted, or heat-reduced factory heater core.

What It Helps Solve

• Weak or inconsistent cabin heat
• Coolant seepage from a failing heater core
• Restricted coolant flow through the HVAC heater circuit
• Fogging or odor caused by heater core leakage
• Loss of heat performance in Ford Ranger, Ford Explorer, and Mazda Navajo applications

Installation Notes and Tips

Verify heater core dimensions, tube diameter, and pipe orientation before installation. This unit uses fixed pipe positioning, so confirm the HVAC case and hose routing match the original layout. Inspect the cooling system, heater hoses, and clamps during replacement, and flush the system if contamination or debris is present. Fitment includes 1995 Ford Ranger, 1991-1994 Ford Explorer, 1989-1994 Ford Ranger, 1994 Mazda B2300, 1994 Mazda B3000, 1994 Mazda B4000, 1991-1994 Mazda Navajo, 1989-1990 Ford Bronco II, 1985-1988 Ford Bronco II, 1983-1988 Ford Ranger, and 1984 Ford Bronco II.

Quality Assurance

Four Seasons lists this heater core as meeting or exceeding OEM requirements, providing a specification-based replacement option for the listed Ford and Mazda HVAC applications. Part number 98700A is also referenced by Global Parts Distributors LLC 1811405 and Remy 94700.