It’s easy to be confused about why an AC unit would freeze up during a hot Sarasota summer. The situation can be especially baffling since the average July high is over 90 degrees. However, it’s a surprisingly common problem, with the two primary causes being an airflow or refrigerant issue.
This can reduce cooling performance and increase the risk of unexpected breakdowns. In brutally hot, humid conditions that could be unsafe for many individuals, it’s important to avoid a complete system failure. When left unaddressed, ice buildup on an AC unit could lead to worsening problems and expensive cooling repairs.
Can an AC Really Freeze Up When It’s Hot Outside?
The evaporator coil within an AC unit contains refrigerant that absorbs heat from the air as it flows through the coil and evaporates. This keeps the evaporator coil cold while the system is running. For an AC unit to work properly, warm indoor air needs to pass over the evaporator coils. The air then cools, releasing humidity, before it flows back into your home.
If there’s an underlying system problem, your air conditioner won’t work normally and may freeze up. This could happen regardless of the temperature outside.
Why AC Freeze-Ups Are Common in Sarasota
Sarasota residents run their air conditioners often due to the hot and humid climate. Longer AC run times and increased workload can put additional strain on their system, leading to AC freeze-ups. This is especially true during July and August, which tend to be the hottest and most humid months of the year.
The Most Common Causes of a Frozen AC
Although refrigerant and airflow problems are two of the most common causes of a frozen AC, they’re not the only ones. Learning about these issues and how to prevent them can help you make informed decisions for your home and air conditioner.
Restricted Airflow
You can take several proactive steps to prevent restricted airflow. Changing your air filters regularly is one of the easiest ways. A dirty air filter can contribute to numerous issues, including blower motor problems and dirty evaporator coils.
Homeowners should replace their dirty filter with a clean one at least every few months. However, due to Sarasota’s hot, humid climate, we encourage homeowners to replace filters more frequently. This task is easy and usually requires only a few minutes. Simply turn the unit off, remove the old filter, install the new one, and turn the unit back on.
Blocked vents are another cause of restricted airflow, but they’re also simple to prevent. To allow proper airflow throughout the system, make sure items like rugs and furniture aren’t blocking your vents. Leave at least a few feet of clearance around each one.
Low Refrigerant Levels
Refrigerant leaks are a common cause of low refrigerant levels. When a leak happens, it reduces the amount of refrigerant and system pressure. This can cause the evaporator coil to become too cold for proper operation and drop below freezing. If this happens, it could lead to frozen evaporator coils. Leaking refrigerant isn’t something homeowners should handle, as topping it off won’t fix the cause. It’s best left to professional HVAC technicians to determine the appropriate repair.
Drainage and Moisture Issues
Drainage and moisture problems can also contribute to your AC freezing up. This includes issues like clogged condensate drains and excess moisture around the system’s components. High humidity levels can worsen these problems, creating more moisture than the system can manage. If moisture isn’t properly drained, ice will form on the evaporator coils.
Mold doesn’t directly cause your AC to freeze up, but it’s still a serious problem that could result from moisture and drainage issues. It can start growing within 24 to 48 hours, especially during Sarasota’s humid summer months. When AC problems are unaddressed, mold can spread rapidly. This could lead to an expensive situation where you need both AC repair and mold remediation to ensure your home’s safety. Contacting us immediately when you notice AC moisture and drainage problems allows us to identify the cause early. This keeps the situation from worsening and becoming more expensive to fix.
Broken Thermostat
If your thermostat breaks in a way that causes your AC to run constantly, it could cause ice to form on the coils. You could also set your thermostat too low, causing the same problem as the evaporator coils become too cold.
What to Do If Your AC Freezes Up
For safety purposes, professional technicians should handle most HVAC issues. However, if you suspect your AC is freezing in summer, there are several steps you can take to try to rectify the situation.
Start by turning the unit off. Next, check the filter. If it’s dirty, swap it out for a clean one. Walk throughout your home and check that all the vents are open and that nothing is blocking them. If the unit is only mildly frozen, give it a few hours to defrost. In severe cases, leave it off for about a day so it thaws completely. Turn the unit back on and resume normal operation.
Another method you can try is to turn off the cooling mode and switch the fan to “On.” This allows air to still flow over the evaporator coil, speeding the thawing process. It’s typically a viable method if the unit is slightly frozen and there’s not heavy ice buildup.
If the problem persists, it’s time to call a professional technician. ABC Southwest Plumbing & Air Conditioning can assess the situation and determine the cause of the problem. Depending on the issue, we’ll recommend either a repair or a replacement.
In certain situations, it’s best to avoid DIY repairs altogether. For example, if you suspect a frozen AC and notice serious warning signs, call us immediately instead. Symptoms like AC ice, burning odors, grinding noises, or electrical issues may point to a more critical situation that needs professional attention from licensed HVAC technicians.
Get Fast AC Repair From ABC Southwest Plumbing & Air Conditioning
You can’t be without a properly working air conditioner for long in Sarasota, especially if family members are temperature-sensitive or have certain health conditions.
We can quickly assess the problem and determine the best repair service to restore cooling. Both standard appointments and 24/7 emergency assistance are available. To help prevent AC problems, we offer AC maintenance service, which we suggest scheduling during the spring. Make sure to ask us about our Ultimate Advantage Club.
If your AC repeatedly freezes up, struggles to keep your home cool, or experiences other issues, don’t wait for help. Contact us at ABC Southwest Plumbing & Air Conditioning immediately.
