It’s easy to panic when your air conditioner evaporator coil is covered in ice. If this happens, try not to stress! This is a common problem most homeowners and renters face, especially in Tampa, Florida, where ACs are needed year-round. 

To understand what to do, it helps to learn about what evaporator coils are, how they fail, and how they function within your HVAC system. 

If you don’t feel like you can handle your AC issues alone, don’t worry! Professional HVAC technicians at 75 Air in Tampa are always ready to help you.

Image of ice, a common hvac issue when an evaporator coil covered in ice
Block of frozen ice with blue toned background.

What is an Evaporator Coil?

When it comes to coils, there are two main types: evaporator coils and condenser coils. 

The evaporator coil, located inside your home, cools the air before it’s sent back through the system. To lower the air temperature, the coil is filled with cooled refrigerant. As warm air from inside your home passes over the coils, the refrigerant absorbs excess heat and moisture. This allows cold, dehumidified air to flow through your house. 

The refrigerant inside your evaporator coils carries that heat to your outdoor AC unit. From there, your condenser coils dump all of the heat into the outside air. 

Top 5 Reasons Why Your Evaporator Coil Is Frozen

If you’re wondering why your evaporator coil is covered in ice, there are several possible causes:

  1. Lack Of Warm Air

Because of the low temperature of the refrigerant, the evaporator coils need enough warm air to prevent them from freezing over. Without it, the coils become vulnerable to this problem. 

  1. Dirty Air Filters

Having dirty air filters obstructs the airflow, so when it’s not circulating around the coils, they may become frozen.

  1. Blocked Condensate Lines

Condensate lines drain excess moisture from your HVAC system. The moisture is condensed to water, then travels to an external drain. If a clog happens near the evaporator coil, this will also cause the coils to ice over.

  1. Refrigerant Leaks

The coolant is the chemical that runs through the evaporator coil changing pressure and temperature to remove heat. When refrigerant leaks, the reduced pressure will absorb more heat, causing the refrigerant lines and coils to form ice. 

  1. Malfunctioning Thermostat 

Since the thermostat corresponds with your AC regulating the temperature and how hard the system works to produce a consistent temperature, this leads to issues. So when the thermostat malfunctions, it may cause the system to run too long and wear out. This strain may lead to frozen coils.

At-Home Solutions

If you are waiting a few days for a professional HVAC worker, there are several steps you can follow to resolve the issue. 

By turning off your unit, it will allow the ice to melt. 

Allowing your system to be off gives your AC a chance to thaw out. If you turn it back on right away, the ice may still be there. Typically, the ice will melt within 24 hours. So, if it’s too hot in your house and you can’t wait, make sure to call experienced professionals, like 75 Air

While your system is off, make sure to switch the thermostat fan on to expedite the melting process. 

Your air filter is commonly located between the return duct and air handler (large metal box that houses fan and motor). If your filter is covered in a thick layer of dirt or dust, replacing it while your unit is off will prevent freezing from occurring again. 

Before turning your AC back on, make sure your coils are dry. Otherwise, any excess moisture will lead to re-freezing and prevent ice build up. 

Contact Experts at 75 Air

If your evaporator coils are covered in ice in the Tampa Bay area, contact our experts at 75 Air. They can quickly resolve your issues to allow you to get back to enjoying a comfortable home.

Our professionals are:

No matter what your HVAC problem, we will diagnose it and speak with you about potential solutions. We will also offer you cost-effective options. Don’t hesitate to contact us today to ask any AC-related questions or to schedule a FREE estimate!