It may seem strange, but one of the most common air conditioning problems during a Texas summer is ice.
If you’ve noticed frost or ice forming on your indoor or outdoor unit, your air conditioner isn’t working properly. Continuing to run it can actually make the problem worse and lead to more expensive repairs.
Here’s what causes an air conditioner to freeze up—and what you should do if it happens.
Restricted Airflow
Your air conditioner depends on a steady flow of warm air moving across the evaporator coil. When that airflow is restricted, the coil can become too cold and begin to freeze.
Common causes include:
- Dirty air filters
- Blocked supply or return vents
- Dirty evaporator coils
- Failing blower motors
- Collapsed or obstructed ductwork
Replacing a dirty filter is a simple first step homeowners can take, but other airflow issues require professional diagnosis.
Low Refrigerant Levels
Low refrigerant is another common reason an air conditioner freezes.
When refrigerant levels drop because of a leak, pressure inside the system changes, causing the evaporator coil to become colder than it should. Moisture in the air then freezes onto the coil, creating a layer of ice that restricts airflow even further.
If your system is low on refrigerant, simply adding more isn’t the solution—the leak must be located and repaired.
Running the System When It’s Already Frozen
Many homeowners assume the answer is to lower the thermostat even further.
Unfortunately, this usually makes the problem worse.
The longer the system runs while frozen, the more ice builds up, making it even harder for your air conditioner to cool your home.
What Should You Do If Your AC Freezes?
If you notice ice on your system:
- Turn your thermostat off or switch the fan to ON to help thaw the coil.
- Replace your air filter if it’s dirty.
- Don’t chip or scrape the ice off the equipment.
- Call an HVAC professional if the system freezes again after thawing.
Allowing the system to fully thaw gives your technician a much better opportunity to diagnose the underlying issue.
Can You Prevent Your Air Conditioner From Freezing?
In many cases, yes.
Routine maintenance helps identify airflow restrictions, dirty coils, refrigerant issues, and worn components before they lead to a frozen system.
Simple habits like replacing your air filter regularly and scheduling annual maintenance can significantly reduce the risk of freeze-ups.
Get Your Cooling System Back to Normal
A frozen air conditioner is usually a symptom of another issue, not the problem itself. The sooner it’s diagnosed, the more likely you are to avoid additional damage and restore efficient cooling.
If your AC has frozen up, Moore Than Air provides professional air conditioning repair throughout Bedford and the DFW area. We’ll identify the cause, make the necessary repairs, and help keep your home comfortable all summer long.
If you see ice on your AC, call us now!
