Four Seasons 35856 A/C Clutch Cycle Switch

Temperature-Controlled A/C Cycling Switch

Four Seasons Temperature Switch 35856 is a system-mounted A/C clutch cycle switch built for 12-volt HVAC control. It uses a driver-adjustable cable, a metal body, and a 2-terminal open blade connector to manage compressor cycling based on temperature settings.

Compatible with 1968-1972 Ford F-100, 1968-1972 Ford F-250, and 1968-1972 Ford F-350, this Four Seasons Temperature Switch 35856 meets or exceeds OEM requirements and is built for direct temperature-based system control.

Key Features

• Part type: A/C clutch cycle switch
• Brand line: Four Seasons Temperature Switch
• Part number: 35856
• Driver adjustable cable activation control
• System mount design
• Metal construction with metal color finish
• 2-terminal open blade connector shape
• 12-volt electrical rating
• Cycling style temperature switch
• Temperature off at 30 and temperature on at 40
• Cap tube length: 42 in.
• Meets or exceeds OEM specifications

Product Details

Four Seasons 35856 is a temperature switch used in HVAC systems to regulate A/C clutch cycling through temperature-based control. The system mount layout and driver-adjustable cable setup support temperature calibration within the specified operating range, while the metal housing and open blade terminals provide a straightforward electrical connection for service replacement work. This part cross-references Bosch 12028 and Gates 21647 for the same application.

Common Issues This Part Can Address

• Compressor cycling that does not follow the intended temperature range
• A/C system control problems related to a worn temperature switch
• Intermittent clutch engagement caused by switch wear or electrical contact issues
• Incorrect temperature-based compressor cut-in or cut-out behavior
• HVAC service replacement needs on Ford truck applications

Installation Notes and Tips

Verify the existing switch style, connector type, terminal count, and cap tube length before installation. Confirm the temperature settings and system mount location match the original configuration on your vehicle. For 1968-1972 Ford F-100, F-250, and F-350 applications, compare the original HVAC routing and electrical connection points before replacing the part.

Quality Assurance

Four Seasons lists this temperature switch as meeting or exceeding OEM requirements, making it a specification-based replacement for temperature-controlled A/C clutch cycling service.