When I turn on the A/C the house never cools down. For example the house temp is 80 and I set the thermostat to 70, the temperature never goes down at all(unless it gets cooler outside). I checked the vents to see if any COLD air was coming out. The air was flowing but it was very weak and semi-cool. I looked at the Trane unit outside and I noticed that the lines that go into the house were covered with ice. I turned off the A/C to let the ice thaw for about 2 days. I then turn the A/C back on again, weak/semi-cool air flows out but it is not COLD air. Before I call the technicians to try and get a solution, I would like to get some opinions to see if maybe I'm leaving something out or I'm overlooking something. Thanks.