The condensation line was clogged, and I had no history of tuneups since the unit was installed. On the cool home membership tuneups the condensate line is flushed out. The air filters are very dirty and need replaced. Dirty air filters can contribute to a clogged condensate line. The condensation line was clogged, and I had no history of tuneups since the unit was installed. On the cool home membership tuneups the condensate line is flushed out. The air filters are very dirty and need replaced. Dirty air filters can contribute to a clogged condensate line. Clear Condensate Drain w/ Compressed gas -Inspect and clear PVC drain line -May require cutting existing line and installing coupler -Test drain line with water to ensure proper drainage