Four Seasons 91794 HVAC Heater Core

Overview of Four Seasons Heater Core 91794

The Four Seasons Heater Core 91794 is designed to provide reliable heating performance for select Mazda vehicles. Engineered with copper and brass materials, this heater core ensures efficient heat transfer and durability. It is compatible with Mazda 323, MX-3, and Protege models, making it a precise replacement part for your vehicle's HVAC system.

• Core dimensions: 5-1/2 inches length, 7 inches width, 1-1/4 inches thickness
• Constructed from copper and brass for enhanced heat conductivity
• Tube diameter: 0.625 inches (15.875 mm) for both inlet and outlet tubes
• Meets or exceeds OEM specifications for fit and function
• Non-adjustable pipe positioning for straightforward installation

Four Seasons Heater Core Product Line Details

The Four Seasons Heater Core line focuses on delivering HVAC heater cores that meet or exceed original equipment manufacturer standards. This product line emphasizes quality materials such as copper and brass to ensure effective heat exchange and long service life. The 91794 heater core is part of this line, offering a direct fit solution for Mazda vehicles requiring dependable heating system components.

Product Description and Specifications

This HVAC heater core features a copper/brass construction that provides excellent thermal conductivity and corrosion resistance. The core measures 5.5 inches in height, 7 inches in width, and 1.25 inches in depth, designed to fit precisely within the HVAC housing of compatible Mazda models. Both inlet and outlet tubes have a diameter of 0.625 inches (15.875 mm), ensuring proper coolant flow. The heater core does not include adjustable pipe positioning, which simplifies installation by maintaining OEM alignment.

Common Applications and Issues Addressed

• Restores heating function in Mazda 323, MX-3, and Protege vehicles
• Resolves heater core leaks causing coolant loss or interior fogging
• Eliminates insufficient cabin heat due to clogged or damaged cores
• Prevents overheating issues related to faulty heater cores
• Replaces corroded or deteriorated OEM heater cores

Installation Notes and Tips

• Ensure compatibility with Mazda 323, MX-3, or Protege before installation
• Drain the cooling system prior to heater core removal to avoid spills
• Handle the copper/brass core carefully to prevent damage to tubes and fins
• Verify hose connections match the 0.625-inch tube diameter for a secure fit
• Follow vehicle-specific service manual instructions for HVAC disassembly and reassembly

Quality Assurance and Warranty

The Four Seasons Heater Core 91794 meets or exceeds OEM standards, ensuring reliable performance and fitment. Manufactured with quality copper and brass materials, this heater core is built for durability 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.