Found wire to be burnt going from contactor to capacitor. Fixed wire and reset breaker and unit turned on. Condenser coil was restricting air entering condenser. Cleaned condenser coil. Found system low on refrigerant. Recharged system with refrigerant. Took amp readings of unit for 5 minutes and unit consistently held 8.2 amps. Unit is from 1991. Recommend replacing a/c system soon.