When you need fast and reliable AC services, call Kova Heating & Cooling at (360) 823-3111!

After a long winter, you’re ready to turn on your air conditioner for the first time this season. But what happens when your AC isn’t cooling properly or you notice ice forming on your system? Frozen evaporator coils are one of the most common problems homeowners face when starting up their air conditioning systems.

Several issues can cause your AC coils to freeze, ranging from simple fixes to more complex problems requiring professional attention. Understanding these causes can help you prevent frozen coils and keep your home comfortable all summer long.

At Kova Heating & Cooling, we specialize in diagnosing and fixing frozen coil issues. Here are the five most common causes and what you can do about them.

1. Dirty Air Filters

The most common cause of frozen AC coils is dirty air filters. Your system’s evaporator coils need proper airflow to function correctly. When air filters become clogged with dust, dirt, and debris, they restrict airflow to the evaporator coil.

Without adequate airflow, the coil becomes too cold and freezes over. This simple problem can cause significant damage if left untreated.

Prevention: Change your air filter every 90 days, or more frequently if you have pets. If you’re unsure how to change your filter, our technicians can show you during your next AC maintenance visit.

2. Faulty Blower Fan

Your blower fan is responsible for moving air across the evaporator coil. When the blower fan malfunctions, it can’t deliver enough airflow, causing the coil to freeze.

Common blower fan problems include:

• Overheated motor
• Electrical issues
• Dust buildup on fan blades
• Worn bearings

Solution: A licensed HVAC technician can inspect and repair your blower fan. At Kova Heating & Cooling, blower fan cleaning is included in our routine AC maintenance service.

3. Clogged Condensate Drain Line

Your air conditioner naturally produces condensation as it cools your home. This moisture drips into a drain pan and flows out through the condensate drain line.

When the drain line becomes clogged:

• Water backs up in the drain pan
• Excess moisture accumulates around the evaporator coil
• The coil and standing water can freeze

Why It Matters: A blocked drain line can cause expensive water damage to your home and serious damage to your HVAC system.

Solution: Professional technicians can clear the blockage and prevent costly damage.

4. Thermostat Malfunction

Your thermostat controls your entire air conditioning system. When it malfunctions, it may:

• Misread your home’s temperature
• Send incorrect signals to your AC system
• Cause the system to overwork

An overworked air conditioner struggles to maintain proper airflow and refrigerant movement, leading to frozen coils.

Quick Check: When you first turn on your AC this season, verify that:

• The thermostat is set to “cool”
• The temperature setting is appropriate
• The display is functioning properly

If you suspect thermostat issues, schedule an appointment with our certified technicians.

5. Refrigerant Leak

A refrigerant leak is one of the most serious causes of frozen coils. Refrigerant absorbs heat from your home’s air and carries it to the outdoor unit for release.

When refrigerant levels are low:

• The system can’t absorb heat effectively
• Warm air circulates back through your ducts
• The evaporator coil becomes too cold and freezes

Important Safety Note: Refrigerant is hazardous and can cause respiratory issues and chemical burns. Many states require immediate repair of refrigerant leaks due to environmental concerns.

Professional Solution: Our experienced technicians can safely inspect and repair refrigerant lines, ensuring your system runs smoothly and efficiently.

What to Do If Your Coils Are Frozen

If you discover frozen coils:

1. Turn off your AC immediately to prevent further damage
2. Let the ice melt completely before attempting to restart
3. Check and replace your air filter if it’s dirty
4. Call Kova Heating & Cooling at (360) 823-3111 for professional diagnosis

Don’t attempt to chip away ice or use heat to speed up melting, as this can damage your system.

Preventing Frozen Coils

Regular maintenance is the best way to prevent frozen coils:

• Schedule annual AC maintenance with Kova Heating & Cooling
• Change air filters regularly (every 90 days or as needed)
• Keep outdoor unit clear of debris and vegetation
• Check thermostat settings when you first turn on your AC each season
• Don’t close too many vents in your home, as this restricts airflow

Professional Evaporator Coil Service

At Kova Heating & Cooling, we provide comprehensive evaporator coil service to keep your AC running efficiently. Our skilled technicians can:

• Diagnose the root cause of frozen coils
• Clean and inspect evaporator coils
• Repair or replace damaged components
• Perform preventive maintenance to avoid future issues

Call Kova Heating & Cooling Today

Don’t let frozen coils leave you without air conditioning during the hottest days of summer. Our knowledgeable staff can handle any HVAC issues you may have, ensuring your home stays cool and comfortable.

Contact Kova Heating & Cooling at (360) 823-3111 to schedule your AC maintenance or evaporator coil service today.