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Why the Air Conditioner Keeps Freezing Up

Why the Air Conditioner Keeps Freezing Up

If your air conditioner malfunctions or becomes damaged, it can freeze itself. A frozen air conditioner will not be able to cool down your home, and ice buildup can lead to further damage and costlier repairs. Knowing some of the most common problems that can contribute to your ac unit freezing up can make it easier to troubleshoot a unit that has frozen.

Your AC Unit Has a Refrigerant Leak

If your air conditioner has sprung a refrigerant leak, it can cause the moisture around your unit to freeze. The worse the leak, the worse the ice buildup will be.

You will know if your unit has developed a refrigerant leak because your air conditioner will begin to blow warm air. If it gets bad enough, the ice on the outside of your air conditioner can prevent air from flowing through.

A HVAC professional will need to address the cause of the leak and refill your system. Special equipment is necessary to make sure that the system has the right amount of refrigerant in it. Too much or too little can negatively affect the efficiency of your AC unit.

Airflow Issues Contribute to AC Unit Freezing Up

Another reason why your AC unit may have frozen is because of bad airflow. This can happen before the unit freezes, unlike with a refrigerant leak.

Poor airflow can occur when dust and debris clog your AC unit’s air filter. You should replace your air filter every two months or so, depending on the size of your system and the type of filter.

Airflow issues can lie with other parts of your AC system. Your ducts may be dirty and need cleaning to improve airflow. Your evaporator, which is the outdoor component of your AC unit, may also be dirty and clogged with debris.

You can remove the grate over your evaporator and remove leaves and branches by hand. You may also want to rinse and wash the evaporator coils to remove dirt and grime. This improves interior air flow and the efficiency of your AC unit.

Your AC Unit’s Fan is Damaged

If your air filter is clean and doesn’t need replacement, the issue lies elsewhere. You may need to replace the fan’s motor.

In some cases, your fan may have cracked. This happens when a mechanical problem bends a component, sometimes even the fan, out of place. If the fan touches another component or piece of metal, it can crack and won’t work any longer.

If either happens, you will have to replace the entire fan and blower system. Failing to do so can lead to condensation collecting inside your AC unit. This can lead to freezing, water damage, and even mold and mildew growth.

Repairing Your AC Unit

If you need to talk to an HVAC professional about your AC unit freezing up, you can contact us. Our team of trained professionals can answer any questions you have and can schedule an inspection or repair whenever you need one.

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