Capacitor

Definition

A capacitor stores electrical energy to be used when your AC system starts. The “start capacitor” normally supplies a jolt of electricity to help the compressor, fan, or blower start working. Once the AC is up and running, the “run capacitor” then takes over, providing extra power to run it for longer time periods.

AC units will often combine Start and Run capacitors into a single package called a “Dual Round” or “dual run” capacitor. Dual round capacitors are distinguished by having three terminals on the top.

Synonyms

start capacitor, run capacitor, “Dual Round” or “Dual Run” capacitor

Abbreviations

CAP, Caps, Cap, C