Four Seasons 35863 A/C Clutch Cycle Switch

Temperature-Controlled A/C Cycling Switch

The Four Seasons Temperature Switch, part number 35863, is a system-mounted A/C clutch cycle switch built for 12-volt HVAC applications. It uses preset activation control with a cycling temperature range that turns the compressor off at 31 degrees and back on at 39.5 degrees to help regulate evaporator temperature.

Compatible With select Mazda RX-7, Mazda 626, Nissan 720, Nissan 510, Nissan 810, Honda Civic, and Honda Prelude applications, this Four Seasons 35863 temperature switch is a direct-fit service part for older vehicle HVAC systems that use an open-blade, 2-terminal connector.

• Four Seasons Temperature Switch / A/C Clutch Cycle Switch
• Preset activation control for consistent cycling operation
• System mount design with metal construction
• Open blade connector shape with 2 terminals
• 12-volt electrical specification
• Temperature off at 31 degrees and on at 39.5 degrees
• Meets or exceeds OEM requirements
• 24-inch cap tube length for system routing

Product Details and Application

Four Seasons 35863 is a temperature-based cycling switch used in automotive air conditioning systems to control compressor engagement based on evaporator temperature. By cycling the A/C clutch at the specified temperature thresholds, it helps maintain stable cooling performance and reduce evaporator freeze-up in properly matched systems. This part number is commonly referenced for classic Honda Civic and Prelude models, along with Mazda RX-7, Mazda 626, Nissan 720, Nissan 510, and Nissan 810 applications.

This part cross-references Gates 21651 for the same application.

What This Part Helps Address

• A/C compressor that cycles too frequently or not at the correct temperature
• Evaporator icing caused by improper temperature control
• Inconsistent cabin cooling from a faulty clutch cycle switch
• Electrical connection issues at a worn open-blade switch terminal
• Replacement needs for aging HVAC temperature switches in older vehicles

Installation Notes and Tips

Verify the connector style, terminal count, cap tube length, and temperature set points before installation. This switch is a system-mounted component, so routing and placement should match the original HVAC layout. Confirm the vehicle uses a 12-volt cycling temperature switch and compare the original part number or service specification before final installation.

Quality Assurance

Four Seasons lists this temperature switch as meeting or exceeding OEM requirements. The metal construction and preset cycling design support service replacement in applications that require accurate A/C clutch temperature control.