Why Do Air Conditioning Units Freeze Up?

Carrier AC System Many homeowners experience issues with their air conditioning units freezing up. If your air conditioner is freezing up, chances are the Freon in your system is expanding more than it should. This increased expansion causes the coils of the system to be colder than usual, freezing up the unit. Another possibility is that something is stopping the air in your home from transferring its heat to the AC unit. Here are a few reasons why air conditioning units freeze up.

1. Insufficient Air Flow

A common reason air conditioning units freeze up is due to insufficient air flow. Air conditioning units function by removing heat from the home to reduce the temperature. If an air conditioning unit is failing to blow the air from the inside of your home over the evaporator coil, then this heat exchange will not take place. This means the Freon won’t be removing heat from the home as it should. With time, the temperature will drop until your AC unit freezes up.

2. Low On Refrigerant

Another reason air conditioning units freeze up is due to being low on refrigerant. If your air conditioning unit doesn’t have enough refrigerant, then the pressure within the system within the system is low. Even with less refrigerant in the system, the refrigerant must still expand at the same rate as before. The more the refrigerant expands, the cooler the temperature. This causes the evaporator coil of your air conditioner to drop below freezing. Therefore, your cooling system freezes up when moisture comes into contact with the evaporator coil.

3. Mechanical Failures

Mechanical failures can also cause AC units to freeze up. Some examples of such mechanical failures include a clogged filter, kinks in the refrigerant lines, and an out of balance or dinged blower fan. All of these mechanical failures can impact the pressure within a system can cause the central air conditioner to freeze up. The main difficulty that many homeowners encounter is how to identify the mechanical failure. Therefore, if you suspect that a mechanical failure is causing your air conditioner unit to freeze up, then you should hire a technician to identify and fix the issue.

Exceptional Services in Monrovia

As you can see, there are many reasons why an air conditioning unit may freeze up. For more information about air conditioning units and the reasons a system may freeze up, don’t hesitate to contact us at General Heating & Air Conditioning, Inc. You can also reach out to us to learn more about the AC repair, AC maintenance, AC installation services we provide.