Four Seasons 96136 HVAC Heater Core

Four Seasons 96136 Heater Core Overview

The Four Seasons 96136 heater core is an aluminum HVAC heater core built for dependable cabin heat and stable coolant-to-air heat transfer. It is engineered and tested for long service life, making it a practical replacement for vehicles that need consistent defrost and interior heating performance.

For drivers searching for a heater core for Honda Civic or similar HVAC repair applications, this Four Seasons heater core 96136 is built around the core dimensions and tube sizes needed for a proper fit in the heater box.

Key Features

• Aluminum heater core construction
• Core dimensions: 11.81 in. height, 6.94 in. width, 1.625 in. depth
• Tube sizes: 0.625 in. and 0.75 in.
• Designed for HVAC heater core replacement service
• Four Seasons part number 96136
• Cross-reference: Gates 6966

Product Details

Four Seasons Heater Core 96136 is part of the brand’s Heater Core line and reflects more than 50 years of mobile A/C experience. The aluminum construction supports efficient heat exchange while keeping the unit lightweight and corrosion-conscious for HVAC service. This part cross-references Gates 6966 for the same application.

When replacing a leaking or restricted heater core, matching the core size and tube dimensions is critical. The 96136 heater core is specified with a 1.625-inch depth, 11.81-inch height, and 6.94-inch width, along with 15.88 mm and 19.05 mm tube dimensions for accurate HVAC system service.

Common Problems This Part May Address

• Weak or uneven cabin heat
• Coolant odor inside the vehicle
• Fogging or poor windshield defrost performance
• Coolant loss from a leaking heater core
• Restricted coolant flow through the HVAC heater circuit

Installation Notes and Tips

Before installation, verify the heater core dimensions, tube orientation, and HVAC case layout against the removed part. Flush the cooling system and inspect hoses, clamps, and seals so the new heater core is not exposed to contamination or trapped debris. On vehicles such as Honda Civic applications, confirm the heater box and hose routing before reassembly.

Because heater core replacement often requires access through the HVAC housing, take care to avoid damaging blend doors, seals, or adjacent components during removal and installation. Confirm leak-free operation after refilling and bleeding the cooling system.

Quality Assurance

Four Seasons states that its products are engineered and tested for years of trouble-free operation. The 96136 heater core is backed by the brand’s long-standing mobile A/C and HVAC experience, with a focus on reliable replacement performance.