Four Seasons 98521 HVAC Heater Core

Reliable Heater Core Replacement for Ford Bronco and F-Series Trucks

The Four Seasons Heater Core 98521 is designed to restore efficient heating performance in your Ford Bronco, F-100, F-150, F-200, F-250, and F-350 models. Engineered with durable aluminum construction, this heater core meets or exceeds OEM standards to ensure consistent warmth and comfort inside your vehicle.

• Core dimensions: 7-1/4 inches length, 6 inches width, 1-7/8 inches thickness
• Constructed from corrosion-resistant aluminum for long-lasting durability
• Tube diameter: 0.625 inches (15.875 mm) for both inlet and outlet
• Non-adjustable pipe positioning for direct OEM replacement
• Compatible with multiple Ford truck models including Bronco and F-Series

About the Four Seasons Heater Core Product Line

The Four Seasons Heater Core line focuses on delivering reliable HVAC components that meet or exceed original equipment manufacturer specifications. This aluminum heater core is part of that line, offering a balance of durability and efficient heat transfer. The 98521 model is engineered specifically for select Ford trucks, ensuring proper fit and function without modification.

Product Details and Specifications

This HVAC heater core features a core height of 7.25 inches, width of 6 inches, and a depth of 1.875 inches, providing optimal heat exchange capacity. The aluminum core material resists corrosion and maintains structural integrity under high-temperature conditions. Both inlet and outlet tubes measure 0.625 inches in diameter, matching OEM dimensions for straightforward installation. The pipe positioning is fixed, designed to align precisely with factory mounting points in Ford Bronco and F-Series trucks.

Common Applications and Problem Resolution

• Restores heating system performance in Ford Bronco and F-100 through F-350 trucks
• Replaces leaking or clogged heater cores causing coolant loss or poor cabin heat
• Eliminates fogging and windshield defrost issues related to heater core failure
• Addresses overheating problems linked to inefficient heat exchange
• Prevents coolant contamination inside the HVAC system

Installation Notes and Tips

Ensure the vehicle is cooled down before beginning heater core replacement to avoid burns from hot coolant. Drain the cooling system and carefully disconnect heater hoses matching the 0.625-inch tube size. Since pipe positioning is non-adjustable, verify alignment with factory mounting points for a proper fit. Inspect surrounding HVAC components for wear or damage during installation to maintain system integrity.

Quality Assurance and Warranty

The Four Seasons Heater Core 98521 is manufactured to meet or exceed OEM specifications, providing reliable performance and durability. This part undergoes rigorous quality control to ensure consistent fit and function in compatible Ford Bronco and F-Series trucks. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.