Four Seasons 91721 HVAC Heater Core

Reliable Four Seasons Heater Core for Efficient Cabin Heating

The Four Seasons Heater Core 91721 is designed to restore your vehicle's heating system performance. Engineered with durable copper and brass materials, this heater core ensures effective heat transfer and long-lasting operation for compatible makes and models.

• Core dimensions: 8-1/4 inches length, 7-1/4 inches width, 2 inches thickness
• Constructed from copper/brass for enhanced heat conductivity
• Core depth of 2.000 inches, height 8.250 inches, width 7.250 inches
• Tube sizes: 0.625 inch (15.875 mm) and 0.750 inch (19.050 mm)
• Meets or exceeds OEM specifications for reliable fit and function
• Non-adjustable pipe positioning for straightforward installation

Four Seasons Heater Core Product Line Overview

The Four Seasons Heater Core line focuses on delivering replacement heater cores that meet or exceed original equipment manufacturer standards. This product line emphasizes quality materials such as copper and brass to provide efficient heat transfer and corrosion resistance. The 91721 model is part of this line, offering a precise fit and dependable performance for vehicles requiring a copper/brass heater core.

Detailed Product Description

The Four Seasons Heater Core 91721 features a copper/brass construction that promotes efficient heat exchange within the HVAC system. Its core dimensions—8.25 inches in height, 7.25 inches in width, and 2 inches in thickness—are designed to match OEM specifications, ensuring compatibility with specific vehicle models. The heater core includes two tubes sized at 0.625 inch and 0.750 inch diameters, facilitating proper coolant flow. This part does not have adjustable pipe positioning, which simplifies installation by maintaining fixed tube locations. The 91721 heater core is engineered to meet or exceed OEM standards, providing a reliable replacement option for vehicles experiencing heating system issues.

Common Applications and Issues Addressed

• Restores heating performance in vehicles with insufficient cabin heat
• Replaces leaking or corroded heater cores causing coolant loss
• Eliminates unpleasant odors from a damaged heater core
• Prevents fogging of interior windows due to heater core leaks
• Resolves overheating issues related to heater core blockages

Installation Notes and Tips

When installing the Four Seasons Heater Core 91721, ensure the vehicle's cooling system is properly drained before removal of the old core. Verify the core dimensions and tube sizes match the original part to avoid fitment issues. Since pipe positioning is fixed, align the heater core carefully to the HVAC housing. Inspect all seals and connections for leaks after installation. Professional installation is recommended for accurate fit and to maintain HVAC system integrity.

Quality Assurance and Warranty

This Four Seasons Heater Core 91721 is manufactured to meet or exceed OEM quality standards, ensuring durability and reliable operation. The copper/brass construction offers corrosion resistance and efficient heat transfer. While specific warranty details are not provided, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship.