Water furnace 3.5 ton r22. Serial number and on site paperwork confirms 1989 equipment installed in 1990 by Winig's 2 pump closed loop pressurized system is running on bare minimum 5 PSI. However the system does start, turn on, and cool good when the thermostat is engaged. Homeowners cleared a blockage in the drain prior to arrival today which is most likely the primary culprit for the water in the lower compressor and electrical compartment. Clean 1.5 in water standing in the bottom of the cabinet, re-pressurize ground loops to 55 PSI, power flush condensate drain with garden hose pressure, run test refrigerant pressures and cooling mode from the thermostat settings Evaporator coil inspection discovered heavy matting around the entire perimeter of the coil including compacting within the cooling fins. The evaporator coil cleanliness is at a point that it has affected the suction pressures and will not stabilize at good running pressures Refrigerant pressures are very erratic fluctu