Tenant stated system has not been keeping temperature inside home. Found system low on charge. Oily substance within auxiliary drain pan. Located (2) areas within evaporator coil leaking. System has also had intermittent challenges with variable speed condenser fan motor as well. Unable to duplicate at this time, but motor may be failing based on past findings with another company. Spoke with Kevin. Built estimate for repairs. Costly repairs may not be recommended. System is out of warranty. Requested field supervisor to quote system replacement as well. Will call when a decision is made with homeowner.