What Causes an AC to Freeze Up?

During summer, you would think a freezing AC is a good thing to produce cold air that is needed, but it is not. When an AC freezes, the temperature, pressure, or airflow controls are not working as they should. The lack of airflow causes the AC to lock in a setting of either warm or cold water. When this happens, it’s best to contact Rol Air Plumbing & Heating for professional air conditioning repair in Otsego, MN.

Blocked Air Flow

Excellent and constant airflow in an AC is essential for it to function optimally. Reasons why the air in your AC unit will not be flowing as it should are a collapsed duct, low voltage to the fan, a bad blower motor, or a clogged air filter.

All these cause ice to form on the coils. When this happens, warm air cannot warm the coils because they are insulated. The more humid it is, the more the ice builds on the coil and freezes the copper pipes, and the AC gets stuck and only blows warm or cold air. Regular air conditioning maintenance can help prevent this from happening.

Low Refrigerant

Refrigerant found in the coils controls the pressure in your unit. It works by passing through the lines where condensation forms on the coils outside. When refrigerant levels are low and the pressure changes, it causes the warm air from your house to move over the AC evaporator, and the moisture freezes on the ice, which then causes ice to form. The ice will interfere with the function of the AC. You will need to call professional services for extensive repairs or a full air conditioning replacement.

Dust In The Coils

Dust can coat the coils if you do not change your filter frequently or if your AC does not have an air filter. The dust will insulate the waves so that warm air cannot regulate the temperatures leading to the AC freezing up. The air filters can be checked during the air conditioning installation.

Be sure to call Rol Air Plumbing & Heating for professional air conditioning services once you hear a rattling noise from your AC or notice it is stuck on one air setting. Contact us today to schedule an appointment. Feel free to call us or fill out the online form.