Four Seasons 36659 A/C Clutch Cycle Switch

Four Seasons 36659 A/C Clutch Cycle Switch

Four Seasons Pressure Switch 36659 is a system-mounted A/C clutch cycle switch built for 12-volt HVAC control. It uses a round connector, 2 terminals, and an M12 x 1.50 female thread for direct pressure-switch service on supported GM truck and SUV applications.

For Chevrolet Blazer, GMC Jimmy, Chevrolet S10, and GMC Sonoma HVAC repairs, this pressure switch helps restore proper compressor cycling when the original switch no longer responds at the correct pressure range. Four Seasons 36659 meets or exceeds OEM requirements and is built with plastic and metal construction.

Key Features

• Four Seasons Pressure Switch line
• Part number 36659 for A/C clutch cycle switch service
• System mount design with round connector
• Female M12 x 1.50 thread for direct installation
• 2-pin male terminal connection
• Cycling style pressure switch
• Operates at 26 psi low off and 46 psi low on
• Black plastic and metal housing
• Meets or exceeds OEM specifications

Detailed Description

This Four Seasons 36659 pressure switch is a cycling A/C clutch control component used in HVAC systems that rely on pressure-based compressor engagement. It is an OE-style replacement for vehicles that use a round connector and system-mounted switch configuration, including many Chevrolet and GMC trucks, vans, and SUVs from the 1990s and early 2000s. This part cross-references UAC SW2962C for the same application.

Fits 1994-2005 Chevrolet Blazer, N/A; Fits 1994-2005 GMC Jimmy, N/A; Fits 1994-2004 Chevrolet S10, N/A; Fits 1994-2004 GMC Sonoma, N/A; Fits 1999-2002 Chevrolet Silverado 1500, N/A; Fits 1999-2002 Chevrolet Silverado 2500, N/A; Fits 2001-2002 Chevrolet Silverado 1500 HD, N/A; Fits 2001-2002 Chevrolet Silverado 2500 HD, N/A; Fits 2001-2002 Chevrolet Silverado 3500, N/A.

What It Helps Address

• A/C compressor that cycles incorrectly
• Loss of compressor engagement from pressure-switch failure
• Intermittent HVAC cooling performance
• Incorrect low-pressure cut-in or cut-out behavior
• Electrical connection issues at the pressure switch

Installation Notes and Tips

Verify connector shape, thread size, terminal style, and pressure range before installation. Confirm the vehicle uses a system-mounted pressure switch with an M12 x 1.50 female fitting and round connector. Compare the original switch location and connector style on Chevrolet Silverado, GMC Sonoma, and related GM applications before replacing the part.

Quality Assurance

Four Seasons 36659 is manufactured to meet or exceed OEM specifications for pressure-switch service. The part is built for 12-volt HVAC systems and uses a plastic and metal construction suited to automotive A/C control applications.