Four Seasons 37320 HVAC Binary Switch

Reliable Pressure Switch for Nissan and Infiniti HVAC Systems

The Four Seasons Pressure Switch 37320 is designed to maintain optimal HVAC system performance in select Nissan and Infiniti vehicles. Engineered for system-mounted installation, this pressure switch ensures accurate pressure monitoring and control within your vehicle's air conditioning system.

• Compatible with Nissan 200SX, Frontier, Pathfinder, Sentra, Xterra and Infiniti QX4 models
• Pressure switch with a 3/8 in. x 24 male fitting thread size for secure system mounting
• Binary style switch with two terminals and female connector gender
• Operates at a low pressure of 31 PSI to protect HVAC components
• Constructed from durable steel with a black finish for long-lasting use
• Meets or exceeds OEM specifications for reliable performance

About the Four Seasons Pressure Switch Product Line

The Four Seasons Pressure Switch line focuses on precision pressure monitoring components designed for HVAC systems. This product line includes binary pressure switches that provide open or closed circuit signals based on system pressure thresholds. The 37320 model is a system-mounted pressure switch that integrates seamlessly with the HVAC system to help maintain proper refrigerant pressure and system safety.

Detailed Product Description

The Four Seasons Pressure Switch 37320 is a binary pressure switch featuring a female connector and a male fitting with a 3/8 in. x 24 thread size. It is designed to mount directly on the HVAC system, providing an open circuit when pressure is below 31 PSI. The switch has two terminals and is constructed from steel with a black finish, ensuring durability and corrosion resistance. This part is compatible with various Nissan and Infiniti models, including the Nissan 200SX, Frontier, Pathfinder, Sentra, Xterra, and the Infiniti QX4. The switch meets or exceeds OEM standards, making it a dependable replacement part for maintaining HVAC system functionality.

Common Applications and Issues Addressed

• Prevents compressor damage by monitoring low refrigerant pressure
• Helps maintain proper HVAC system cycling and operation
• Resolves intermittent or no air conditioning issues related to pressure switch failure
• Protects against system overpressure or underpressure conditions
• Ensures accurate pressure signal for HVAC control modules

Installation Notes and Tips

• Ensure the system is depressurized before removing the old pressure switch
• Verify the 3/8 in. x 24 thread size matches the vehicle’s HVAC system port
• Use appropriate tools to avoid damaging the steel fitting during installation
• Check electrical connections for secure fit with the female connector
• Test system pressure and switch operation after installation

Quality Assurance and Warranty

The Four Seasons Pressure Switch 37320 is manufactured to meet or exceed OEM quality standards, ensuring reliable performance in Nissan and Infiniti HVAC systems. This part is backed by Four Seasons’ quality assurance protocols. Please refer to Four Seasons’ warranty terms for specific coverage details.