Found the system not functioning on arrival. Homeowner stated they noticed issue on Sunday, and they tried basic troubleshooting steps but had no luck. After checking for proper voltage inside I went to outdoor unit, found the system was receiving 24 volts but not at the motor starter. Checked around and found the wires had been chewed through by a small rodent. Cut all bad wiring out and properly secured all wiring and tapped accordingly. Also found a small rodent on the start assist kit, this caused the start assist kit to fail and not function properly. Replaced start assist kit so the system can work properly. Lastly performed a AC precision tune up. Clean and tune up AC; cleaned condenser coil, checked all outdoor electrical components, tested indoor air flow, checked refrigerant levels, and tested overall AC operation. Also a Furnace precision tune up; clean and tune up furnace; clean burners, test ignition components, adjust gas level, test safety circuit, check indoor motors, c