The house is ours and we have some questions about the AC. We noticed that while the AC unit is on, and responds to the on and off switch, it's hot on the first and second floor and the basement is cool, but the AC vent is leaking water and there is ice around the piping (pictures below). Any thoughts or suggestions?
Lindsay & Tommy N.
Insufficient airflow causes the coils to drop below freezing. The humidity in the air then collects on the coils, creating an even greater buildup of ice on your evaporator. This is usually a result of a dirty air filter that needs to be replaced, but can also be caused by an air filter that is too restrictive. It can also be (but is not typically caused) by a low refrigerant level.
Things you can do: first turn you system off so it defrosts. Check your filters if clogged replace them. Also be sure your blower motor is working and air is coming out of the registers. Be sure that the dampers are open. Set the thermostat to the "fan on" position. This setting causes the blower motor / fan to come on and run continuously without heating or cooling your house. Then take a piece of paper towel or toilet paper and hold it in front of each register. The ones with the handle on them should be blowing air into the room. The ones without handles are the return ducts. They should be sucking in air.
Hope that helped!