In June 2011 new system installed in house. 3 Zones, digitally controlled. We suffered all year, it didn’t work well, it was too humid, uncomfortable and had frozen outside pipes often. Tweaked to death, over winter nothing happened. Spring, needed A/C and voila, same problems. Guy came out and FINALLY after hours of tinkering around decided to super pressure check and found a leak, outside the pipe going from house to condenser had a small leak in the solder … ACK!!! All that misery for one tiny hole which THEY did, and it had nothing to do with the actual equipment or our treatment of it, DAY 1 it showed signs of a leak but it COULDN’T be that, they intimated, never checking their connections, even when we complained of horrible freezing issues, lack of cooling to correct levels, too much humidity … on and on … just a freakin little solder fixed it. Urg … forever.