Why Is My HVAC System Freezing Up?

During the cold winter months, homeowners and residents in San Diego need to pay special attention to their HVAC systems to ensure that piping does not freeze. However, if you have found that your HVAC system is freezing up even during warmer temperatures, it is likely that there are deficient components that need to repaired or replaced. Let us take a look at some of the most common reasons as to why HVAC systems freeze up.

Common HVAC freezing reasons

One of the most common reasons why an HVAC system starts to freeze even though external temperatures remain high, is because of leak in the refrigerant compartment. A crack in the refrigerant compartment, can be caused due to poorly soldered joints or constant friction and vibration. When the valves connected to the refrigerant system’s crack, the refrigerant leaks on to other parts of the HVAC system causing them to malfunction.

It is important to clean your HVAC’s system’s evaporator coils from time to time. The evaporator coil is responsible for maintaining a steady stream of airflow. When these coils become dirty, the grime acts as insulation, thereby reducing the HVAC system’s functionality, and causing piping to freeze.

A failing blower motor can also cause HVAC system’s to freeze and begin failing. In some cases, the motor may function but not at the required rate. In other cases, the motor may only turn on intermittently. If your HVAC is victim to a failing blower motor, it is important that you contact a professional HVAC repair service as soon as possible.