If my hubby is correct, our central air also is "powered" by our furnace. For some reason, the air conditioning isn't working right. If you leave it on for more than an hour, it freezes up the lines going to the unit outside and only brings down the temp in the house by one degree! He cleaned it all out, and it still isn't working right. Would anyone happen to know what may be causing this problem? The heating part works just fine in the winter. ANY suggestions or advie is welcomed and appreciated! We cannot afford to call anyone from a professional place.