2008 3.5t gas upflow closet. System down upon arrival. Tstat has no power - found heavy corrosion on batteries slots; Removed. Tstat was not able to push power through. I jumped low voltage and let the system run while diagnosing. Blower capacitor is below manufacturer tolerance. Once system was powered off, I performed a courtesy leak detection due to the age of the system. My leak detector picked up and registered radical refrigerant molecules entering into breathable air. Rust and oil stains present on evaporator coil. Forcing the compressor on, I found an inrush amperage that exceeds the manufacturer specifications. Hard start kit has its pressure indicator blown. While system was on, my refrigerant gauges read below manufacturer specifications and freezing temperatures. 1" filter. I ended up jumping r and g at the circuit board to allow for continuous airflow per homeowner request. I instructed the homeowner that the blower will be on until the 120v power was pulled or the bre