I came home to find my air set at 90.. The kids somehow did it. It was hot and should be at 80degrees... I turned the temp down but the air still blows hot. Will it take a long time to cool down. House is 2700 sf. Also, both copper pipes in the air handler and the outside unit get hot. Is this a problem. Otherwise the unit works and responds to the therm. But the house and pipes are hot. I turned the unit off for now.