Four Seasons 37320 HVAC Binary Switch

Four Seasons 37320 Pressure Switch

The Four Seasons 37320 pressure switch is a system-mounted HVAC binary switch built for pressure-based compressor control. It uses a female connector, a male 3/8 in. x 24 fitting, and a 2-terminal layout to support direct replacement service on select Nissan and INFINITI applications.

Four Seasons Pressure Switch components are built for HVAC service work where accurate pressure signaling matters. This Four Seasons 37320 part meets or exceeds OEM requirements and is designed for select Frontier, Xterra, Pathfinder, QX4, Sentra, and 200SX models.

Key Features

• Binary HVAC pressure switch with open comp open/closed operation
• System-mounted design for direct HVAC pressure control service
• Female connector with 2 terminals
• Male fitting with 3/8 in. x 24 thread size
• Steel construction with black finish
• Meets or exceeds OEM specifications
• Low-pressure operate point at 31 psi

Detailed Description

This Four Seasons HVAC binary switch is used in air conditioning pressure monitoring circuits to help the system respond to refrigerant pressure conditions. The 37320 pressure switch is a direct-fit style replacement for select Nissan Frontier, Nissan Xterra, Nissan Pathfinder, INFINITI QX4, Nissan Sentra, and Nissan 200SX applications. This part cross-references UAC SW11151 for the same application.

As part of the Four Seasons Pressure Switch line, this component is built for service technicians and repair buyers who need a pressure switch with the correct connector style, thread size, and operating range. The 37320 part number is also referenced as 37320 in Four Seasons catalogs and interchange listings.

Vehicle Fitment

• Fits 1998-2004 Nissan Frontier, N/A, Pressure Switch
• Fits 2000-2004 Nissan Xterra, N/A, Pressure Switch
• Fits 2001 Nissan Xterra, N/A, From 7/01; Pressure Switch
• Fits 1997-2000 INFINITI QX4, N/A, Pressure Switch
• Fits 1996-2000 Nissan Pathfinder, N/A, Pressure Switch
• Fits 1998-1999 Nissan Sentra, N/A, Pressure Switch
• Fits 1998 Nissan 200SX, N/A, Pressure Switch

Common Repair Uses

• Restores HVAC pressure signal input for compressor control
• Addresses intermittent air conditioning operation caused by a failed pressure switch
• Replaces a damaged or leaking system-mounted pressure switch
• Corrects electrical connection issues at the HVAC pressure switch circuit
• Supports repair of refrigerant pressure monitoring faults on select Nissan and INFINITI vehicles

Installation Notes and Tips

Verify the connector style, fitting thread size, and vehicle application before installation. Confirm the system-mounted location and compare the existing switch to the replacement part number 37320 to ensure the correct HVAC pressure switch is selected for the vehicle.

Quality Assurance

This Four Seasons pressure switch meets or exceeds OEM requirements for the listed applications. Four Seasons is a recognized aftermarket brand for HVAC service parts, and the 37320 pressure switch is built to match the specified electrical and mechanical interface for the covered vehicles.