Four Seasons 20664 HVAC Blower Motor Resistor

Overview of Four Seasons Resistor Block 20664

The Four Seasons Resistor Block 20664 is designed to regulate the blower motor speed in HVAC systems for select Chevrolet, GMC, and Oldsmobile vehicles. This resistor block ensures variable speed control for optimal climate comfort in models like the Blazer, Bravada, and Jimmy.

• Compatible with Chevrolet Blazer, GMC Jimmy, and Oldsmobile Bravada
• Part number 20664 for precise identification
• Variable speed control for HVAC blower motors
• Connector gender configuration: female / male / male
• Rectangular connector shape with 3, 2, or 1 terminal options
• Type: Switches for reliable operation

Detailed Product Description

The Four Seasons Resistor Block 20664 is a critical component in the HVAC blower motor system, providing variable speed control through its resistor design. Featuring a rectangular connector shape and a combination of female and male connectors, this resistor block supports multiple terminal configurations (3, 2, or 1 terminals) to match specific vehicle wiring harnesses. Its design allows for smooth switching between blower motor speeds, ensuring consistent airflow and temperature regulation inside the cabin.

This resistor block is part of the Four Seasons Resistor Block product line, which focuses on delivering reliable and compatible HVAC electrical components. The line is engineered to meet OEM specifications, providing a direct replacement for factory-installed resistor blocks in Chevrolet, GMC, and Oldsmobile vehicles.

Applications and Common Issues Addressed

• Restores variable blower motor speeds in Chevrolet Blazer HVAC systems
• Resolves blower motor speed failure in GMC Jimmy models
• Fixes inconsistent airflow or blower motor operation in Oldsmobile Bravada
• Eliminates blower motor stuck on one speed or no speed
• Addresses electrical resistance issues causing HVAC blower malfunction

Installation Notes and Tips

• Ensure vehicle compatibility with Chevrolet Blazer, GMC Jimmy, or Oldsmobile Bravada before installation
• Disconnect the battery prior to replacing the resistor block to prevent electrical shorts
• Verify connector orientation: female / male / male with rectangular shape
• Check terminal count (3, 2, or 1) to match the vehicle’s wiring harness
• Secure the resistor block firmly to avoid vibration-related damage

Quality Assurance and Warranty

Four Seasons manufactures the Resistor Block 20664 to meet or exceed OEM standards for durability and performance. This part undergoes rigorous testing to ensure reliable operation within the HVAC system. While specific warranty details may vary, Four Seasons typically offers coverage against defects in materials and workmanship, providing confidence in the product’s longevity and function.