The Carrier P291-4554RS Dual Round Run Capacitor is an essential electrical component designed to support the operation of both the compressor and fan motor in compatible air conditioning and heat pump systems. It works by storing and releasing electrical energy to provide the necessary phase shift for efficient motor startup and continuous operation. Commonly used in residential and ... https://www.partshnc.com/p291-4554rs-carrier-run-capacitor-round-370v;dual-455mfd-replaces-p291-4553rs-m10