Arrived on site to diagnose a leaking unit in attic. Spoke to client and she stated she lived in home for a a couple years and was told unit is 2 years old. Inspected unit and found unit is from 2015 Goodman. She showed me drain line out side was draining but unit dose coil good. Inspected attic and unit and found drain lines was clogged up. Advised would need to cutt and clear line. Furnace and Evaporator has have no emergency drain pan. Drain lines have no safety overflow switches on either line and recommended adding one at least to primary line. Advised under sink can be clogged and she stated she doesn’t have plumbing issues. Blew and vacuum line from top to bottom. Cleaned under sink as well and is clear. Client saw line were really backed up. Water tested and lines are cleared now and draining. Connected safety switches and reconnected lien and is good. Cycled unit is operant good. During connection time was connecting line and found copper line that goes under sink was corr