Why Is My Air Conditioner Freezing Up?

While it may seem strange to think about your AC unit freezing up in summer, it’s often a common time for things to stop working in your central AC line and air compressor functions. Right now, you’re probably wondering, “well, why is my air conditioner freezing up?”

To answer the question “why does my AC keep freezing up at night during summer,” changes in temperature between hot summer days and its cool nights, often throw your AC’s calibration off. Unfortunately, this causes a major issue because summer is when you need AC the most. 

At Hearn Plumbing, Heating and Air, we want your HVAC system to perform its best. Keep reading to find out more about a frozen AC, how to fix it and how you can prevent it in the future.

How to Tell if AC is Frozen

AC units convert warm air from the outside to cool the inside of your home. However, when heat can’t reach your evaporator coil correctly, this leads to the cooling chemical refrigerant expanding too much. Instead of the heat being properly absorbed into the refrigerant, this causes your typically efficient machine to literally freeze. 

Signs of freezing can be hard to see because they often happen inside the unit. Some signs your AC may be frozen aside from obvious ice on your exterior unit include: insufficient or uneven cooling throughout your home, strange hissing sounds coming from your unit, visible moisture noticeable throughout your home, and clogged filters or coils.

Why is My Brand New AC Unit Freezing Up?

If your new HVAC system is freezing up already, the wrong size was likely installed. If your ductwork can’t handle the needs of a large HVAC system, it will not allow enough airflow in your system. When this happens, your coil will often ice over, a problem you can’t see without a skilled HVAC technician’s help.

What To Do When Your Unit Freezes Up

When your air conditioner freezes up, there are a few at-home remedies to try in order to fix it. These include turning your AC off to let it thaw, changing your air filter and running your system’s fan after it’s had time to thaw. If these solutions don’t improve your airflow and the quality of your air, it’s time to call in the professionals who can inspect the inside of your unit.

How Long Does Your Air Conditioner Take to Thaw

A frozen AC unit typically takes anywhere from an hour to a day to thaw, depending on how much ice is affecting your unit. However, thawing out the ice won’t be your only issue. Falling frozen chunks can damage your unit, so it’s important this process is monitored. In addition, melting ice can overflow your drain pan and cause water to pool around your system.

How Do I Keep My Air Conditioner From Freezing Up in the Future?

At this point, you may be asking yourself, “how do I keep my air conditioner from freezing up in the future?” Regular maintenance like filter changes can help air flow issues. In addition, installing a programmable thermostat will help you monitor your system better.

Call Hearn Plumbing, Heating and Air For Your Home Services

For your air conditioning maintenance, repairs, and installations in the Madison, OH area, call our team of expert HVAC technicians today. Hearn Plumbing, Heating and Air is your one-stop-shop for home service needs. Whether you need help with pipe repair, you experience a reverse cycle air conditioner freezing up, or you’re ready for renovations, with us, you’re in good hands.