Is it normal for AC coils to freeze?

There are many reasons why your AC unit may be freezing up. Air conditioners need proper airflow to keep the cold coil warm. Warm air from the home is needed for the coil to stay cold and keep the temperature above freezing. A freeze up can also be caused by low refrigerant and improper fan operation.Click to see full answer. Correspondingly, how do I keep my air conditioner from freezing up? To sum up, here’s what you need to do to prevent the A/C from freezing: Have the refrigerant level checked. Change the filter monthly. Keep the supply vents open. Have the fan speed increased. Have the thermostat checked out. Inspect the condensate drain weekly. Make sure any window units you have are angled correctly. One may also ask, how do you tell if AC coils are frozen? Signs That You Have a Frozen Evaporator Coil Check for ice around the outdoor refrigerant line. Look around your air handler for condensation and moisture. Is your condensate drain pan full or overflowing? Open up your air handler and inspect evaporator coil for ice and/or condensation. Likewise, what causes air conditioner coils to freeze up? A dirty evaporator coil (the inside one) can cause a lack of airflow across it, dropping the temperature and causing your air conditioner to freeze up. It is also a recipe for several other unpleasant problems with your AC, like Dirty Sock Syndrome.What causes AC lines to freeze?Once the refrigerant absorbs the heat, the (now) cool air re-enters your home. But if there is a lack of warm air blowing across the evaporator coil, then the refrigerant gets too cold, which can cause the refrigerant line that connects to your outdoor unit to freeze.