AC Indoor Unit Freezing Up

Understanding AC Indoor Unit Freezing Up: Causes and Solutions by Arctic Air Conditioning & Plumbing

At Arctic Air Conditioning & Plumbing, we understand the frustration of dealing with an AC indoor unit freezing up, especially during the hot summer months. A frozen indoor unit not only disrupts your comfort but can also lead to potential damage to your HVAC system if left unaddressed. In this informative blog post, we'll delve into the causes of AC indoor unit freezing up and provide effective solutions to resolve this issue.


Causes of AC Indoor Unit Freezing Up:

Poor Airflow:

Restricted airflow due to dirty air filters, blocked vents, or closed registers can prevent warm air from reaching the indoor evaporator coil, causing it to freeze.


Low Refrigerant Levels:

Insufficient refrigerant levels in the system can lead to a drop in pressure within the evaporator coil, resulting in its freezing. Refrigerant leaks or improper charging are common culprits.


Dirty Evaporator Coil:

Accumulation of dirt, dust, and debris on the evaporator coil can insulate it, hindering heat absorption and causing it to freeze.


Faulty Thermostat:

A malfunctioning thermostat may cause the AC system to run continuously, leading to overcooling and eventual freezing of the indoor unit.


Fan Issues:

Problems with the indoor blower fan, such as a faulty motor or belt, can disrupt airflow over the evaporator coil, contributing to freezing.


Solutions to Address AC Indoor Unit Freezing Up:

Improve Airflow:

Ensure air filters are clean and replace them regularly to promote proper airflow. Unblock vents and open registers to allow unrestricted airflow throughout your home.


Check Refrigerant Levels:

Schedule a professional inspection by Arctic Air to check refrigerant levels and identify any leaks. Properly recharge refrigerant if necessary to maintain optimal levels.


Clean Evaporator Coil:

Schedule professional evaporator coil cleaning to remove dirt and debris buildup, allowing for efficient heat absorption and preventing freezing.


Calibrate Thermostat:

Verify thermostat settings and calibration to ensure accurate temperature control. Replace a malfunctioning thermostat if needed to prevent overcooling.


Inspect Fan System:

Have our technicians inspect the indoor blower fan for any issues such as motor failure or belt wear. Repair or replace components as necessary to restore proper airflow.


Don't let a frozen AC indoor unit ruin your indoor comfort. Trust Arctic Air Conditioning & Plumbing to diagnose the root cause of the issue and provide effective solutions to prevent future occurrences. Contact us today for expert HVAC services and enjoy a comfortable and efficient cooling system all year round.