Why Do My AC Coils Keep Freezing Up?

There’s nothing more frustrating than turning on your air conditioner for some cool air only to find that it’s not working properly. One common issue that many homeowners face is a frozen evaporator coil, which can cause your AC unit to malfunction and leave you sweltering in the heat. At King Mechanical LLC, we’re dedicated to helping homeowners keep their HVAC systems in top working condition, and we’re going to help you identify the top reasons why your AC coils might be freezing up and how to fix and prevent this problem. If you’re in need of an AC repair in Lake Charles or the surrounding area, don’t hesitate to contact us today.

Top Reasons AC Coils Freeze Up

There are several factors that can cause your air conditioner’s evaporator coil to freeze, resulting in reduced airflow and a less efficient cooling process. Here are the most common reasons for a frozen evaporator coil:

Clogged Air Filters

Dirty air filters can obstruct the flow of cool air, causing the coil to freeze. Regularly changing your air filters can help maintain proper airflow and prevent this issue.

Dirty Evaporator Coil

A dirty evaporator coil can also cause the coil to freeze, as dirt and debris can block the flow of cool air. Regular maintenance and cleaning of your AC unit can help prevent this problem.

Blower Fan Issues

A malfunctioning blower fan can reduce airflow across the evaporator coil, leading to freezing. If you suspect a problem with your blower fan, contact an HVAC technician for assistance.

Refrigerant leaks

Low refrigerant levels due to leaks can cause the evaporator coil to become too cold, resulting in freezing. An HVAC technician can check your refrigerant levels and repair any leaks.

How to Fix Frozen AC Coils

If you find yourself dealing with a frozen AC coil, follow these steps to fix the issue:

  • Turn Off Your Air Conditioner: First, turn off your air conditioning system to prevent further damage and allow the frozen coil to thaw.
  • Check and Replace Dirty Air Filters: Inspect your air filters for dirt and debris, and replace them if necessary to improve airflow.
  • Inspect the Evaporator Coil: Once the coil has thawed, check it for dirt and debris. If it’s dirty, clean it to ensure proper airflow and cooling efficiency.
  • Examine the Blower Fan: If you’re still experiencing issues, inspect the blower fan for any visible problems or damage. Contact an HVAC technician for assistance if needed.
  • Check Refrigerant Levels: If all else fails, have an HVAC technician inspect your refrigerant levels and repair any leaks.

How to Prevent Air Conditioner Coils From Freezing Over

AC issues are never fun, especially during the dog days of summer. The good news is that you can often take steps to prevent issues from cropping up at the worst possible times. To avoid dealing with a frozen evaporator coil in the future, follow these preventive measures:

  • Change Air Filters Regularly: Replace your air filters every 1-3 months to maintain proper airflow and prevent clogging.
  • Schedule Regular Maintenance: Regularly scheduling professional AC maintenance can help identify and fix potential issues before they become major problems.
  • Keep Your AC Unit Clean: Make sure to clean your air conditioning unit and evaporator coil regularly to prevent dirt and debris buildup.
  • Monitor Refrigerant Levels: Have an HVAC technician check your refrigerant levels periodically to ensure they are within the appropriate range.

By taking these proactive steps, you can help keep your air conditioning system running smoothly and efficiently, avoiding the frustration of frozen AC coils. If you’re in need of air conditioning replacement services or a simple repair, contact King Mechanical LLC for expert assistance. Our team of skilled HVAC technicians is ready to help you keep your home comfortable all year long.