When your AC unit is freezing up during the hottest days of the summer, it can be frustrating. Understanding what causes your AC to freeze up is the first step in fixing your issue. In this guide, our team at Arctic Air Home Services covers several common culprits, including dirty evaporator coils, clogged air filters, restricted airflow, and low refrigerant levels. Identifying your issue and fixing it is the key to restoring full performance to your air conditioning system.
Why an AC Freezes Up: Airflow & Refrigerant Basics
Frozen air conditioning systems are very common throughout the long Florida summer, as air conditioning systems work hard to keep your home comfortable. For your system to function optimally, it needs adequate airflow at all air vents and the outdoor condenser, along with a clean air filter. Any restriction in airflow can reduce your system’s performance and cause the coils to freeze up.
Additionally, your system needs adequate refrigerant to absorb heat from your home. If your refrigerant level is low due to a leak, your system may not have enough coolant to remove heat from your home. Keeping up with routine AC maintenance is one of the best ways to catch these issues before the worst of the summer season.
The #1 Summer Cause in Florida: Dirty Filters & Blocked Airflow
Because Florida has a very long and humid summer, it means air conditioning systems are running constantly. Dirty air filters are one of the biggest causes of AC malfunctions. Your filter can become clogged with pet hair, dust, and other debris that flow through your air vents. Sometimes simply replacing your air filter and thawing out your evaporator coil can restore your cooling system to normal operation. Many Florida homeowners inspect their air filters once a month to ensure they know when it is time for a fresh one.
Low Refrigerant & Why It’s Never a DIY Fix
Probably the most common reason that your AC is freezing up is that your system is low on refrigerant. If you’re not scheduling routine maintenance, it’s easy to miss a refrigerant leak.
When refrigerant levels are too low, pressure inside the evaporator coil drops, causing the coil’s temperature to fall below freezing. Moisture in the air then freezes on the coil, reducing your system’s ability to cool your home efficiently. Because refrigerant leaks require specialized equipment to locate and repair, a licensed HVAC technician should fix the leak. They will then recharge your cooling system to the manufacturer’s specifications.
What to Do the Moment You See Ice (Step-by-Step)
If you notice reduced cooling performance from your air conditioning system, check your indoor air handler. If you notice ice forming on the evaporator coil or an AC line is frozen, shut your unit off immediately. You never want to keep running your system, as it could cause costly damage to your compressor. Instead, turn the blower fan on your thermostat to the “On” setting. This will allow air to circulate over the surface of the evaporator coil and help to speed up the thawing process. After the coil is thawed, you can turn your system back on. However, if you encounter further issues, it is best to call a professional for an AC inspection.
What You Can Safely Try vs. When to Call a Pro
As a homeowner, there are some things that you can check to try and restore your air conditioning system before calling a professional. When determining what is causing your AC to freeze up, start by checking your air filter to see if it’s dirty and needs replacement. If your air filter is fine, check all the vents throughout your home to ensure they’re fully open to allow adequate airflow.
If there’s any debris pushed up against your outdoor condenser unit, move it away so there’s a good two to three feet of open space. Make sure that your system is completely thawed out before restarting it. Pay close attention if your unit starts freezing up again. If it does, it’s important to shut it off and contact us for professional AC repair service.
How Arctic Air Diagnoses & Prevents Repeat Freeze-Ups
If your AC is freezing up often during the worst of the summertime weather, it’s time to seek out professional assistance. Our knowledgeable technicians at Arctic Air Home Services will arrive promptly to diagnose the root cause of your frozen evaporator coil. We’ll inspect refrigerant levels, airflow, the evaporator coil, blower components, and other key system parts to identify the underlying issue. After completing the necessary repairs, we’ll recommend any maintenance or system adjustments needed to prevent future freeze-ups. We also offer maintenance plans to help you stay ahead of AC issues.
Is your AC freezing up? Contact Arctic Air Home Services today to get top-notch AC repair service in Sarasota and Manatee County, FL!
Frequently Asked Questions
Whether it’s about what causes an AC to freeze up or how to handle an AC line that’s frozen, homeowners have questions. Our team is always ready to provide straightforward answers.
