Carrier P291-4004R Run Capacitor 318518-761 this differential pressure switch functions

this differential pressure switch functions as a critical safety limit

the indicator LED is clear

ensure you check the jumper settings for ECM vs

The high-volume output relay ensures rapid response times and consistent pressure delivery to terminal units

while the red to blue contacts open on rise (heating)

Carrier P291-4004R Run Capacitor 318518-761 this differential pressure switch functionsThe Carrier P291 4004R is a high duty 40 MFD 440V round run capacitor designed for continuous motor operation in HVACR systems. Built to Totaline standards, this OEM grade component is rated for both 370V and 440V applications, providing the necessary phase shift for permanent split capacitor (PSC) motors across Carrier, Bryant, and Payne equipment. This single run capacitor features a non PCB, castor oil filled design with an internal 10,000 AFC