Four Seasons 36674 A/C Clutch Cycle Switch

Reliable Pressure Switch for HVAC Systems

The Four Seasons Pressure Switch 36674 is designed to maintain optimal A/C clutch cycling in various vehicle models. Engineered for system mount installation, this switch ensures precise pressure control to protect your HVAC system.

• Compatible with Buick, Cadillac, Chevrolet, GMC, Oldsmobile, Pontiac, and Volvo vehicles
• Fits models including Astro, Blazer, Bonneville, Camaro, Corvette, and more
• Operates at low pressure on/off points of 49 psi and 25 psi respectively
• Durable plastic and metal construction with a black finish
• Features a female fitting with 7/16 in. x 20 thread size and two male blade terminals
• Open connector shape with 12-volt operation
• Meets or exceeds OEM specifications for reliable performance

About the Four Seasons Pressure Switch Product Line

The Four Seasons Pressure Switch line focuses on cycling pressure switches designed to regulate A/C clutch engagement based on system pressure. The 36674 model is part of this line, providing consistent cycling functionality to maintain system efficiency and prevent compressor damage in compatible vehicles.

Product Details and Specifications

This A/C clutch cycle switch is system mounted and features a cycling style pressure switch that opens at 0 psi. It operates within a pressure range that turns the switch on at 49 psi and off at 25 psi, ensuring proper cycling of the A/C clutch. The switch includes two male blade terminals and a female fitting with a 7/16 in. x 20 thread size, designed for secure and reliable connections. Constructed from a combination of plastic and metal, the switch is finished in black and designed for 12-volt systems. The open connector shape facilitates easy installation and compatibility with a wide range of vehicle HVAC systems.

Common Applications and Issues Addressed

• Prevents A/C compressor from cycling too frequently or not cycling at all
• Protects HVAC system from pressure-related damage
• Ensures proper engagement and disengagement of the A/C clutch
• Helps maintain consistent cabin temperature control
• Resolves intermittent A/C clutch operation in Buick, Chevrolet, and GMC models

Installation Notes and Tips

When installing the Four Seasons Pressure Switch 36674, ensure the system is depressurized before removal of the old switch. The female fitting with 7/16 in. x 20 thread size requires proper torque to avoid leaks. Verify the two male blade terminals are securely connected to the vehicle wiring harness. This switch is designed for system mount installation, so confirm the mounting location matches the original equipment. Testing the switch operation at the specified pressure points (49 psi on, 25 psi off) can help verify correct installation.

Quality Assurance and Warranty

The Four Seasons Pressure Switch 36674 meets or exceeds OEM standards, ensuring reliable performance and durability. Manufactured with quality plastic and metal materials, this switch is built to withstand typical automotive HVAC system conditions. While specific warranty details are not provided, Four Seasons products generally come with a limited warranty covering defects in material and workmanship.