08 Jul

Frozen AC Evaporator Coils? Here’s What You Should Do Next

When it comes to air conditioners, chilly temperatures are usually a good sign. However, like most areas in life, it’s possible to have too much of a good thing. A common issue that we see with customers’ ACs is frozen evaporator coilers. This is a serious problem that needs to be addressed right away, otherwise, it could cause further damage to your HVAC system.

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What causes evaporator coils to freeze?

The evaporator coils can be found inside the indoor air handler system. The coils absorb heat and humidity, which get transported and released outside. There are a handful of reasons why the coils can become frozen, including:

  • Dirt buildup on coils
  • Low refrigerant
  • Improper airflow
  • Blocked drainage line
  • AC running during low outdoor temperatures (below 60 degrees)

Signs that your coils may be frozen

Since the evaporator coils aren’t easily visible or accessible, you won’t always see the ice buildup. But you will likely notice clues that you have a problem on your hands. Here are a few of the typical signs.

  • AC has trouble reaching or maintaining the set temperature
  • No air or warm air coming out of vents
  • Unexplained water leaks or staining
  • Wet AC air filter

How to fix frozen evaporator coils

If you suspect that the evaporator coils may be frozen, shut the system off right away. Putting too much strain on the AC can cause a breakdown, which is going to be more costly than repair service.

If you feel comfortable opening up the air handling unit, you can inspect the inside for ice or water. You can try melting the ice with a blow dryer but do not touch the coils with your hands as it could damage the components. Next, you’ll want to look for any easy fixes such as replacing a dirty air filter or unclogging the condensate pipe.

When to call in the professional

If you can’t identify and address an obvious cause for the freezing, it’s best to call in a licensed HVAC professional for a service appointment. The technician should inspect and clean the coils, fan, and drainage lines. The thermostat and refrigerant level should also be evaluated and fixed, if necessary.

The best way to prevent frozen evaporating coils from ruining your summer is with regular AC maintenance. Whether you want to prevent issues from occurring or need to fix a faulty air conditioning unit, you can trust the experts at Robert B. Payne, Inc. For a free estimate, call us today at (540) 373-5876.