Anybody want to take a shot at helping me troubleshoot my Air Conditioner? It's not for my car but for my house. It worked fine last summer. We even turned it on once over the winter when we had a house full of guests. It blew room temperature air then too. I'm not sure what any of the parts are called but I'll do my best. There is a pipe that goes into my house. It's frozen (see pic). Inside the house, the ice melts and drips in the basement. There is a return line that goes back out to the AC unit. It is room temperature. The radiator things are room temperature as well. There is a drain pipe that usually drips water but it hasn't been. I thought maybe it was plugged. I put a vacuum hose on it and sucked some water out. What can I check for? Here's the pic.