3 system inspection. Upstairs and main level furnaces are from 2005, furnaces have corrosion/rust on inducer and burners, heat exchangers are in similar conditions based on surrounding areas. Upstairs ac temperature split is only 8 degrees indicating an issue with system refrigerant levels. System may have leak associated with a part of the equipment (evaporator coil or condenser). Basement system is from 2022, has frozen evaporator coil, lineset, And condenser indicating a potential leak in the system. Provided estimates for repairs on systems but based on our findings today, it might be time to think about getting a brand new system.