Weather Champions installed our Mitsubishi ductless system in our Manhattan apartment. Two of the units constantly leaked, and when Weather Champions failed to fix the leaks, we were without AC during the hottest weeks (July) of the summer. Weather Champions only attempted to resolve the issues after I filed a BBB complaint. However, by the time they tried to repair the system, it was November, and the weather was much cooler. The following spring, the system started leaking again, causing water damage to our walls. I was forced to hire another HVAC firm to repair the system. After breaking into the walls, they found that the 2 leaking units were not connected properly and the lines were not insulated, resulting in leaks behind the wall. To make matters worse, Weather Champions performed electrical work without a permit and upon inspection by the DOB, found that their work was out of code. I ended up having to hire another contractor to re-do their work so that the renovation would pass inspection.