alright i looked up the problem online and one man had a video that shows him blowing an air compressor into the AC drain tube. its that easy. look for the rubber tube hanging down with a wet end insert compressor tip and shoot it once or twice but make sure your not right under it because it might come out in a fast gush depending how much is built up. The BAD news is it more then likely will happen again but its a easy fix. good luck

Stephanie