Four Seasons 20994 HVAC Pressure Transducer

HVAC Pressure Transducer for Nissan and INFINITI

Four Seasons 20994 is a system-mounted HVAC pressure transducer built for vehicles that rely on accurate refrigerant pressure feedback to manage air conditioning operation. It uses a 3-pin rectangular male connector and a 3/8 in. x 24 male threaded fitting for a direct-style replacement on supported Nissan, INFINITI, Mazda, and Chevrolet applications.

This Four Seasons Pressure Switch line focuses on OE-style pressure monitoring for HVAC systems, helping the control system read refrigerant pressure and respond appropriately during compressor operation. Part number 20994 meets or exceeds OEM requirements and cross-references UAC SW10087C for the same application.

• Four Seasons 20994 HVAC pressure transducer
• System-mounted design with male 3/8 in. x 24 fitting
• Rectangular connector with 3 male pins
• Variable open/closed operation for pressure-based HVAC control
• Meets or exceeds OEM specifications
• Fits many Nissan GT-R, Murano, Titan, Frontier, Rogue, Maxima, and INFINITI Q50, QX60, and QX80 applications

Detailed Product Overview

Use Four Seasons 20994 when the HVAC system needs a pressure transducer that communicates refrigerant pressure changes to the vehicle’s control strategy. This part is listed across a wide range of Nissan and INFINITI platforms, including long-tail search applications such as a Nissan Murano HVAC pressure switch replacement, Nissan Frontier AC pressure transducer replacement, and INFINITI QX60 pressure switch service. It also appears on Mazda CX-5, Mazda 6, Mazda CX-3, and Chevrolet City Express applications.

Because the part is system mounted and uses a 3-terminal connector, it is important to match the connector shape, pin count, and thread size before installation. The 20994 part number is also a useful reference when searching for a direct replacement for Nissan and INFINITI HVAC pressure sensor service.

Common Problems This Part May Address

• HVAC compressor cycling caused by incorrect refrigerant pressure signal
• Air conditioning shutdown from a failed pressure transducer
• Intermittent AC operation on Nissan and INFINITI vehicles
• Fault codes related to HVAC pressure input
• Poor system response when refrigerant pressure feedback is lost

Installation Notes and Tips

Verify the connector style, 3-pin terminal layout, and 3/8 in. x 24 male thread before installation. Confirm the original sensor location on the HVAC system and compare the removed part number when possible. After installation, inspect for proper sealing and clear any HVAC-related diagnostic codes if required by the vehicle.

Quality Assurance

Four Seasons 20994 is built to meet or exceed OEM requirements for the listed applications. The Four Seasons Pressure Switch line is used for direct-fit HVAC service on many Nissan, INFINITI, Mazda, and Chevrolet models, including 2000-2024 coverage across supported vehicles.