Customer concerned about unit not cooling properly. Customer said other companies can not cleaned drain line. Checked blower motor operation and inspected evaporator coil condition. Checked safety float switch and inspected drain line. The drain line is clogged and the drain pan is full of water and leaking on garage floor. Cleaned vacuumed drain pan and drain line. Checked drain pan and drain fittings. Flushed drain pan and drain line with water. Prime drain line and checked unit operation. Unit is cooling well and drains at this. Recommend new Taps membership to reduce cost and annual performance maintenance.