Four Seasons 98726 HVAC Heater Core

Four Seasons 98726 Heater Core Overview

The Four Seasons 98726 heater core is an aluminum HVAC heater core built for direct replacement service in heating and defrost systems. With a compact 9-1/2 in. height, 7-3/8 in. width, and 2 in. depth, it is sized for applications that require a precise core fit and efficient coolant-to-air heat transfer.

Four Seasons Heater Core line parts are focused on replacement-ready HVAC components for passenger vehicles and light-duty applications. This aluminum heater core meets or exceeds OEM requirements and uses fixed pipe positioning for a straightforward service match.

Key Features

• Part number 98726 from Four Seasons Heater Core
• Aluminum heater core construction for efficient heat transfer
• Core dimensions: 9-1/2 in. height, 7-3/8 in. width, 2 in. depth
• Tube sizes: 0.625 in. and 0.750 in.
• Meets or exceeds OEM specifications
• Fixed pipe positioning; not adjustable

Detailed Product Description

The Four Seasons 98726 heater core is an aluminum HVAC heater core designed to restore cabin heat performance when the original core is restricted, leaking, or no longer transferring heat effectively. Its aluminum core material supports thermal efficiency, while the listed dimensions help confirm fit during HVAC service. This part is a practical replacement choice for vehicles that require a heater core with a 9.500 in. core height, 7.375 in. core width, and 2.000 in. core depth. If you are servicing a Honda Civic or similar compact vehicle application that uses this style of heater core, verifying the tube sizes and case dimensions is essential before installation. This part cross-references Gates 6833 for the same application.

Common Issues This Heater Core Can Address

• Weak or uneven cabin heat output
• Coolant odor inside the vehicle
• Fogging or film on the windshield from an internal coolant leak
• Visible coolant loss traced to the HVAC heater core
• Restricted heat flow caused by an aging or clogged core

Installation Notes and Tips

Confirm the core height, width, depth, and tube diameters against the removed part before installation. Because the pipe positioning is fixed, align the inlet and outlet tubes carefully with the vehicle’s HVAC case and coolant lines. Inspect the heater hoses, seals, and surrounding HVAC components during service so the replacement core is not installed into a system with unresolved leaks or blockage. For Honda Civic heater core replacement or other compact-car HVAC repairs, matching the original tube orientation is critical for proper fit.

Quality Assurance

Four Seasons lists this heater core as meeting or exceeding OEM requirements, supporting replacement-level fit and function for HVAC repair work. Part number 98726 is built as an aluminum heater core for dependable service in the heating system.