As the summer heat bears down in SWFL, the last thing you want is your air conditioning system breaking down. One common issue that homeowners may encounter is a frozen AC coil, leading to insufficient cooling and potential damage to the unit. In this blog post, we’ll explore the causes, signs, and effective solutions for dealing with a frozen air conditioner coil.

Signs of a Frozen AC Coil

The first thing you might notice is warm air coming from your vents instead of the cool air you expect. This is often a result of a frozen evaporator coil hindering the heat exchange process. You may also observe ice buildup on the outdoor unit or notice a lack of airflow from the supply vents, which is a good indivator that there may be a frozen coil at play.

Common Causes of a Frozen AC Coil

Several factors contribute to the freezing of air conditioner coils. Low refrigerant levels, a refrigerant leak, or dirty coils can all disrupt the proper flow of air, leading to a frozen coil. Insufficient airflow caused by dirty air filters, malfunctioning blower fans, or blocked return vents is another common problem that can result in the coil freezing.

Steps to Thaw a Frozen AC Coil

1. Turn Off Your AC Unit:

The first step is to turn off your air conditioning system to prevent further damage and assess the situation.

2. Check for Refrigerant Leaks:

Examine your refrigerant lines and AC unit for any visible leaks. If you suspect a refrigerant leak, it’s crucial to contact a professional HVAC technician immediately.

3. Address Insufficient Airflow:

You can use a hair dryer on low heat to carefully thaw the frozen coil. Be patient and avoid using excessive heat, as this could lead to water damage. Simultaneously, ensure that your air filters are clean, return vents are unblocked, and the blower fan is functioning correctly.

4. Professional Assistance:

If the issue persists or if you’re uncomfortable handling it yourself, it’s best to call a professional HVAC technician. They can identify and address the root cause, whether it’s low refrigerant levels, a refrigerant leak, or any other underlying problem.

Preventative Measures

1. Regular Maintenance:

Schedule routine maintenance with a professional technician to ensure your HVAC system is in optimal condition.

2. Clean Coils:

Keep your evaporator and condenser coils clean to facilitate proper heat transfer and prevent freezing.

3. Maintain Proper Airflow:

Ensure unobstructed airflow by regularly changing air filters, clearing debris from the outdoor unit, and addressing any issues with the blower motor.

4. Programmable Thermostat Usage:

Use a programmable thermostat to maintain a consistent temperature, preventing the system from overworking and potentially freezing.


Dealing with a frozen AC coil requires swift action to prevent further damage and costly repairs. Contact Dolphin Cooling if you need help addressing any AC issues. We also offer maintenance plans that will extend the life of your AC unit. By addressing the root causes, practicing regular maintenance, and seeking professional help when needed, you can ensure your cooling system functions efficiently, providing relief during the scorching summer months. Don’t let a frozen AC coil turn your cool setting into a frustrating and uncomfortable situation – take the necessary steps today to keep your home comfortable and your energy bills in check.