If you have ice on your Air Conditioner, the first thing you should do is shut the unit off to allow your system to thaw. Our AC Techs will not be able to diagnose your unit while it is blocked with ice. Next, check your AC filter and replace, if needed. If your filter’s not dirty, give our office a call at (512) 450-1980 to schedule an AC diagnosis today. A dirty evaporated coil, low levels of refrigerant (R-22 or R-410A), restricted airflow through the AC unit, or other mechanical failures that need to be repaired by a licensed HVAC technician, could all be the cause of the ice on your unit.