Upon arrival, the customer was worried about a clogged drain line due to the secondary pan under the unit in the closet was almost overflowing. The system has a primary drain pan safety switch so I sent an estimate to put a secondary safety float. Switch in the emergency pan and flushed the drain line. The customer approved the estimate. After flushing the drain line and installing the safety float switch and the emergency pan I then tested the switch and everything tested out OK. The system is operating/cooling properly at this time