Amana ASX14 AC 3 Ton tear out all mixed matched unit replace with Amana 3 ton straight cool system on pad block pad low-voltage high-voltage copper all hook up strap down pads to pads unit to to block tear out old air handler replace on new coffin box cut return hall and coffin box sealHook up low-voltage high-voltage copper and drain line clean drain line with drain solution start u?up added one and a half pounds 410 A to unit unit cooling perfectly customer happy