It’s hot. You’ve been running around campus all day going from class to class. You’re ready to get back to your dorm and turn on the air conditioning. But, because it’s February, it doesn’t work.Why not?Some students in Lincoln and Morrill Towers and the north campus area dorms wonder why they can’t crank up the air conditioning on warmer winter month days.”Our air conditioning was on for four weeks in the fall, and now it doesn’t work,” said Andy Rickly, a freshman majoring in engineering. “We pay for it; we should get to turn it on when we want.”Some buildings on campus can run air conditioning in the winter, said Steve Schick, assistant director for facilities, programing and planning. The buildings include the Math Tower, Mershon Center and the Wexner Center.Because the dorms were built in the 1960s, the air conditioning technology is not as advanced as systems put in the newer buildings, Schick said.Air conditioning cannot be turned on in the winter months because of the way the systems produce cold air, Schick said.Water stored in towers is cooled as it travels through pipes. Fans are used to blow the cold air from the pipes into the rooms, Schick said.Because the water is stored outside in the towers and pipes, there is a chance the cold weather will cause the pipes to freeze and burst, Schick said.When the winter months approach, 95 percent of the pipes and towers have to be drained to prevent freezing, he said.The process to clean and refill the system takes about two days, which is why the air conditioning does not work when there are warm days in the summer, he said.”We usually run the air conditioning from March through October, depending on the weather,” Schick said.