Service diagnostic found that the condensation drain line was clogged. Water had backed up into the safety switch and shut down the system. Options for repair were presented to the homeowner and she chose to have the drain line cleared. I cleared the drain line and flow tested the drain with two gallons of water. I also treated the drain line. I function tested the system and the system was cooling with a 17 degree temperature split. I also replaced the air filter with a client supplied filter. The system was running at the completion of service.