PETERBILT 12CP45-4 A/C Pressure Transducer

Manufacturer

PETERBILT

Product Description

A/C PRES TRANSDUCER

Features & Benefits

• Monitors high-side refrigerant pressure to trigger compressor clutch and cooling fan cycles
• Connects via a standard 3-pin weather-sealed terminal for direct integration with the HVAC harness
• Signals the ECM to cut power to the compressor if pressures exceed or fall below safe operating limits
• Threads directly into the A/C line for a leak-free, high-pressure seal
• Fits late-model Peterbilt chassis equipped with factory PACCAR climate control systems
• Resists vibration-induced signal drift to ensure consistent cabin temperature management

Peterbilt A/C Pressure Transducer

The Peterbilt A/C Pressure Transducer is a high-side refrigerant sensor that monitors system pressures to control compressor clutch engagement. This 3-pin Peterbilt 12CP45-4 transducer is a direct-fit component for Peterbilt 388, 389, and 579 models, typically threading into the high-pressure line near the firewall or condenser. It converts refrigerant pressure into a linear voltage signal, allowing the vehicle’s control module to manage fan speeds and prevent the compressor from "slugging" or running in low-charge conditions. The stainless steel body and sealed connector are engineered to resist the high-heat cycles and chemical exposure of the engine compartment.