Four Seasons 36494 A/C Clutch Cycle Switch

Four Seasons 36494 Pressure Switch

The Four Seasons Pressure Switch, part number 36494, is a system-mounted A/C clutch cycle switch built for 12-volt HVAC systems. It uses a 2-terminal blade connection with a female M12 x 1.50 fitting and Weather Pack protection for dependable electrical contact in automotive air conditioning service.

Key Features

• Pressure-type cycling switch for A/C clutch control
• System mount design with female M12 x 1.50 thread
• 2-terminal blade connection, male terminal gender
• Plastic and metal construction
• Operates at 25 psi low off and 44 psi low on
• Open at 0 psi
• Meets or exceeds OEM requirements
• Weather Pack sealed connection

Product Details

Four Seasons Pressure Switch 36494 is a cycling-style HVAC pressure switch used to monitor refrigerant pressure and control A/C clutch operation. It is designed for R134a-equipped systems and is listed for a wide range of Ford, Mercury, Lincoln, Mazda, Jeep, Hyundai, and Nissan applications. This part cross-references Hayden 5080 for the same application. Common fitment includes 1994-1996 Ford F-150, 1994-1996 Ford Explorer, and 1994-1998 Nissan Quest, along with other factory-air vehicles that use the specified pressure-switch configuration.

What It Helps Address

• A/C compressor cycling that is too frequent or too infrequent
• Loss of clutch engagement caused by pressure-switch failure
• Incorrect refrigerant-pressure signal to the HVAC control circuit
• Intermittent A/C operation from worn electrical contacts
• System-mounted switch replacement on R134a vehicles

Installation Notes and Tips

Verify the 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 2 blade terminals. For fitment-based searches, this part is commonly selected for 1993-1996 Ford Taurus, 1994-1996 Ford Ranger, and 1993-1996 Jeep Grand Cherokee applications, as well as other listed models. Always compare the original switch and connector before replacement.

Quality Assurance

Four Seasons 36494 is engineered to meet or exceed OEM specifications for pressure-switch service. The Four Seasons Pressure Switch line is built for direct-fit HVAC repair where accurate clutch cycling and reliable electrical connection are required.