If you’ve woken up on a hot summer day and noticed that your AC’s coils are frozen, you might be thinking: how is this possible? The truth is, an air conditioning coil can freeze in any weather. However, that doesn’t mean you shouldn’t take the issue seriously. Frozen air conditioner coils can spell significant problems for your AC unit.

Unfortunately, there’s more than one reason why your AC coils freeze. Problems or malfunctions across any part of your AC system could be to blame. We’ll go over a few of the most common causes and how to fix frozen AC coils.

Signs of Frozen AC Coils

Before discussing how to fix frozen AC coils, it’s important to know the signs of frozen coils. For example, you’re most likely dealing with a frozen AC coil if you:

  • Spot condensation around your air handler
  • Feel warm air coming from your AC unit
  • Notice refrigerant leaks 

Refrigerant Leaks

Refrigerant leaks are a considerable problem. If you notice a refrigerant leak, this means that your air conditioning system doesn’t have the proper refrigerant levels to function correctly. Low refrigerant levels will put pressure on your AC, which results in frozen refrigerant lines and coils.

Dirty Air Filters

Dirty air filters can result in low airflow and poor air quality in your home. When the air filters are preventing any air from entering or leaving your AC, your AC’s coils can get too cold; this will eventually cause your coils to freeze.

Broken Fan

Before diving into how to fix frozen AC coils, another part of your AC system you should turn to is the fan. Damaged or broken air fans can also cause poor airflow. When this happens, not enough air is circulated throughout the system, resulting in frozen coils.

Damaged Thermostat

Your thermostat essentially controls your AC. However, if the thermostat isn’t working properly, the AC system might run longer than it usually should. If this happens, frozen evaporator coils can occur.

Clogged Condensate Lines

If your condensate drain pan is full or flooding over, this is a sign that your AC’s condensate lines are blocked. Your AC needs these condensate lines to get rid of moisture caused by humidity. If a clogged condensate traps extra condensation in your AC, then your AC’s coils could freeze.

Next Steps

Overall, preventative maintenance can help you avoid frozen AC coils and other HVAC problems. To schedule maintenance or for help with your AC in New Orleans, give Keefe’s a call.

However, how do you fix frozen AC coils? There are four ways you can try to thaw the coils:

How to Defrost AC Coils Infographic

Here is some more information on thawing frozen coils: 

  1. No matter what, turn off your AC system at the breaker box if you are trying to defrost your coils.
  2. NEVER be rough with your evaporator coils or attempt to chip off the ice, as this could damage your unit. Carefully use a hairdryer to melt the ice.
  3. If possible, run your heat pump (if your equipment has one) on defrost mode.
  4. Turn off your AC’s thermostat but turn on the fan to circulate air.

Turn to an Expert

If you cannot identify why your AC’s evaporator coils are frozen or cannot unthaw them, it’s a good idea to turn to a professional HVAC technician for help. Keefe’s offers AC repair in New Orleans, LA, and the surrounding areas. Give us a call or schedule service on our website!