Four Seasons 35889 HVAC Pressure Switch

Overview of Four Seasons Pressure Switch 35889

The Four Seasons Pressure Switch 35889 is a system mounted trinary pressure switch designed for 12-volt automotive HVAC systems. This metal pressure switch features a female fitting with a 7/16" x 20 thread size and an open connector shape, making it suitable for specific vehicle HVAC applications requiring precise pressure control.

• Voltage: 12V compatible with standard automotive electrical systems
• Connector Shape: Open for easy integration
• Fitting Gender: Female with 7/16" x 20 thread size
• Number of Terminals: 4 for reliable electrical connections
• Style and Type: Trinary pressure switch for multi-function pressure sensing
• Material: Durable metal construction
• System Location: System mounted for direct pressure monitoring
• Meets or exceeds OEM specifications
• Operate PSI Medium On: 230 PSI for accurate pressure activation
• Fan Open/Closed: Closed; Compressor Open/Closed: Open

About the Four Seasons Pressure Switch Product Line

The Four Seasons Pressure Switch product line specializes in HVAC pressure switches designed to monitor and control refrigerant pressure within automotive air conditioning systems. The 35889 model is part of this line, offering a trinary pressure switch that supports multiple pressure thresholds to protect the system and ensure proper operation of the compressor and cooling fan. This product line is engineered to meet or exceed OEM standards, providing reliable performance for compatible vehicle HVAC systems.

Detailed Product Description

The Four Seasons Pressure Switch 35889 is a trinary pressure switch that operates at 230 PSI medium pressure, designed to manage compressor and fan operation within automotive HVAC systems. Its metal construction ensures durability under varying temperature and pressure conditions. The switch features four terminals and an open connector shape, facilitating straightforward electrical connections. The female fitting with a 7/16" x 20 thread size allows for secure installation in system-mounted locations. This pressure switch is engineered to meet or exceed OEM requirements, making it a dependable replacement part for vehicles requiring precise pressure monitoring and control.

Common Applications and Issues Addressed

• Prevents compressor damage by monitoring refrigerant pressure
• Controls cooling fan operation based on system pressure
• Protects HVAC system from overpressure conditions
• Ensures proper cycling of compressor and fan for efficient cooling
• Helps diagnose pressure-related HVAC system failures

Installation Notes and Tips

When installing the Four Seasons Pressure Switch 35889, ensure the system is depressurized and the vehicle’s electrical system is disconnected to avoid injury. The female fitting with 7/16" x 20 thread size requires proper torque to prevent leaks. Verify the connector terminals align correctly with the vehicle’s wiring harness. This pressure switch is system mounted, so confirm the mounting location matches OEM specifications for optimal performance. Consult the vehicle’s service manual for specific installation procedures related to HVAC pressure switches.

Quality Assurance and Warranty

The Four Seasons Pressure Switch 35889 is manufactured to meet or exceed OEM standards, ensuring reliable operation within automotive HVAC systems. Constructed from durable metal materials, this pressure switch is designed for longevity and consistent performance. While specific warranty details are not provided, Four Seasons products typically come with a limited warranty covering defects in material and workmanship. Refer to Four Seasons documentation for exact warranty terms.