Four Seasons 96138 HVAC Heater Core

Four Seasons 96138 Heater Core Overview

Four Seasons 96138 is an aluminum HVAC heater core built for direct replacement service in heating and climate control systems. With a compact 1 in. core depth, 4.06 in. core height, and 11.25 in. core width, it is sized for applications that require a precise fit and efficient heat transfer.

This heater core is part of the Four Seasons Heater Core line, a product family focused on replacement HVAC components for passenger vehicles and light-duty applications. If you are searching for a heater core for Honda Civic or Toyota Corolla heating repair, Four Seasons 96138 is a relevant OE-style replacement reference to verify against your original unit.

Key Features

• Aluminum heater core construction for corrosion-resistant service
• Core dimensions: 1 in. depth, 4.06 in. height, 11.25 in. width
• Tube size: 0.625 in. / 15.88 mm on both connections
• HVAC heater core replacement for heating system repair
• Four Seasons part number 96138 for catalog matching and lookup

Product Details

Four Seasons 96138 is an aluminum heater core designed to restore heat exchange performance inside the vehicle HVAC system. The aluminum tube-and-fin style supports efficient coolant-to-air heat transfer, which is critical when the cabin heater is producing weak output or uneven temperature. This part cross-references Spectra Premium 99442 for the same application.

Use this heater core when replacing a leaking, restricted, or heat-limited unit in a vehicle that matches the original dimensions and tube size. Confirm the core depth, height, width, and inlet/outlet tube diameter before ordering to ensure proper HVAC case fitment. For Honda Civic and Toyota Corolla heater core replacement searches, Four Seasons 96138 is a part number worth comparing to the original equipment unit.

What It Can Help Fix

• Loss of cabin heat
• Coolant odor inside the vehicle
• Moisture or fogging from a leaking heater core
• Restricted coolant flow through the HVAC heater circuit
• Uneven or weak defrost performance caused by poor heater output

Installation Notes

Verify the original heater core dimensions and tube diameter against 1 in. depth, 4.06 in. height, 11.25 in. width, and 0.625 in. tubes before installation. Drain the cooling system as needed, inspect hoses and seals for wear, and flush the heater circuit if contamination is present. Proper HVAC case access and careful connection alignment help prevent leaks after replacement.

Quality Assurance

Four Seasons states that its mobile A/C and HVAC replacement products are engineered and tested for dependable operation, backed by more than 50 years of mobile A/C experience. Four Seasons 96138 is built to support long-term service in the vehicle heating system.