We conducted a comprehensive warranty-covered diagnostic and repair service for a Generac standby generator experiencing multiple system errors in Montgomery. Our technicians performed an in-depth mechanical and electrical evaluation to identify underlying hardware faults within the power generation assembly. We successfully replaced the internal rotor and stator components along with the necessary resistor to resolve persistent under-voltage and wiring alarm codes. Following the hardware replacement, we verified system integrity through rigorous voltage testing and calibrated the Evolution 2.0 controller. By validating the electrical output and clearing all fault codes, we restored the generator to factory performance standards. This repair ensures the unit remains fully operational and protected under its manufacturer warranty coverage for future reliability during power outages. This service confirms the generator is calibrated for peak efficiency and consistent weekly exercise cycles.