If you’ve ever asked yourself, “Why is my AC unit freezing up?”, you’re not alone. This is a common issue for homeowners in Van Buren, Arkansas, especially during peak cooling seasons. A frozen air conditioner can leave you with poor airflow, warm indoor temperatures, and even costly damage if left unaddressed. While some minor fixes might help, it’s always best to call a professional HVAC technician to properly diagnose and repair the issue. At Riverside Comfort Care, we specialize in keeping your AC running smoothly—no ice buildup included!
In this guide, we’ll explore the most common reasons for a freezing AC unit, what steps you can take to address the issue, and when it’s time to call the experts for help.
Why Is My AC Unit Freezing Up? The Signs
Before diving into the causes, let’s first identify the warning signs of a frozen AC unit. If you notice any of the following, your system may be suffering from ice buildup:
- Visible ice on refrigerant lines, coils, or inside the air handler
- Reduced airflow, or no cool air blowing from the vents
- Water leaks near the indoor unit as the ice melts
- Unusual noises like hissing or bubbling
- Increased humidity inside your home
If your system shows any of these symptoms, it’s important to act quickly. Continuing to run your AC in this state can lead to further damage and costly repairs.
Why Is My AC Unit Freezing Up?
There are several reasons your AC unit might freeze, and each requires proper attention to prevent long-term issues. Below are the most common causes.
1. Restricted Airflow
One of the top culprits of a freezing AC is restricted airflow. Your system relies on a steady flow of warm air to prevent ice from forming on the evaporator coils. When airflow is blocked, the temperature drops too low, leading to ice buildup.
Common airflow restrictions include:
- Dirty air filters – When clogged with dust and debris, airflow is reduced, causing the coils to freeze.
- Blocked or closed vents – Closing too many vents or having furniture blocking them can disrupt circulation.
- A faulty blower motor – If the blower isn’t working properly, it won’t push enough air over the coils.
2. Low Refrigerant Levels
Refrigerant is essential for absorbing heat and cooling your home. If your system is low on refrigerant due to a leak, it can cause pressure imbalances, leading to ice formation.
Signs of a refrigerant leak:
- Hissing or bubbling noises from the AC unit
- Poor cooling performance despite running the system
- Increased energy bills due to an overworking AC
It’s important to note that adding refrigerant is not a DIY job. Handling refrigerants without proper certification is dangerous and illegal. Call a professional HVAC technician to check for leaks and recharge your system safely.
3. Dirty or Blocked Evaporator Coils
Over time, your evaporator coils can become covered in dust, dirt, or mold, preventing them from effectively absorbing heat. When this happens, the coils can become too cold, leading to ice accumulation.
How to prevent dirty coils:
- Schedule annual AC maintenance with a professional.
- Replace air filters regularly to minimize dust buildup.
- Keep the area around your AC clean to prevent dirt from entering the system.
4. Thermostat Malfunctions
Your thermostat controls how often and how long your AC runs. If it malfunctions or is set incorrectly, it may cause your system to overwork and freeze up.
Check your thermostat for:
- Incorrect temperature readings
- Faulty wiring or dead batteries
- A location near heat sources affecting its accuracy
Upgrading to a programmable or smart thermostat can help maintain optimal settings and prevent your AC from overcooling.
5. Cold Outdoor Temperatures
Running your AC when outdoor temperatures are too low—especially in the spring or fall—can cause freezing. Most AC systems are not designed to operate in temperatures below 60°F, as the refrigerant may not function properly in colder conditions.
If nighttime temperatures in Van Buren, AR, dip too low, consider turning your AC off or setting the thermostat to a slightly higher temperature.
How to Fix a Frozen AC Unit
If your AC unit is already frozen, don’t panic! Follow these steps to safely thaw it out and prevent further damage.
1. Turn Off the AC and Let It Thaw
First, turn off your AC unit immediately. Running it while frozen can strain the compressor and lead to expensive repairs. Let the ice melt naturally, which may take several hours. You can speed up the process by turning on the fan-only mode.
2. Replace or Clean Your Air Filter
A dirty air filter is a common cause of frozen AC units. Check your filter and replace it if it’s clogged with dust and debris. Ideally, filters should be changed every 1-3 months.
3. Inspect and Open Vents
Ensure all supply and return vents in your home are fully open and unblocked. If furniture or curtains are covering them, rearrange them to allow proper airflow.
4. Check the Thermostat Settings
Make sure your thermostat is set to an appropriate temperature. If your AC is running too cold for long periods, try setting it a few degrees higher. If you suspect a malfunction, consider having it inspected by a professional.
5. Call a Professional for Repairs
While some quick fixes might help, an AC freezing up is often a sign of an underlying issue. If your unit continues to freeze, it’s best to call an expert for a comprehensive inspection and repair.
At Riverside Comfort Care, we specialize in diagnosing AC problems quickly and efficiently, ensuring your system is back to peak performance.
Why Is My AC Unit Freezing Up? Why Choose Riverside Comfort Care?
If your AC unit keeps freezing up, don’t wait until it completely shuts down. Riverside Comfort Care offers professional HVAC services in Van Buren, Arkansas, and the surrounding areas. Our team is:
Licensed and experienced in AC repair and maintenance
Fast and reliable, offering emergency services when you need them most
Committed to customer satisfaction, ensuring you get quality service every time
We don’t just fix frozen AC units—we help prevent future issues so you can enjoy year-round comfort without worrying about sudden breakdowns.
Why Is My AC Unit Freezing Up? Call Riverside Comfort Care Today!
If you’re still wondering, “Why is my AC unit freezing up?”, it’s time to take action. Instead of troubleshooting on your own, let the professionals handle it for you. Call Riverside Comfort Care at (479) 353-5266 to schedule an AC inspection and repair. We’ll get your system running smoothly again in no time!
