We all understand how hot the summer can be in Houston. It can get really, really hot and this is the time most of us turn down the thermostat and send our air conditioning systems into an overwork mode to keep us fresh and our homes comfortable. This may seem like a great idea until the time your AC unit freezes up. Keep in mind that a frozen air conditioner can ruin a hot summer day very fast. But what can make your AC unit freeze up? Here are some of the common causes of this problem.

Low Refrigerant Levels

Your system might be low on refrigerant if it has frozen up. This means that you either have a refrigerant leak somewhere, or your refrigerant charge is turned off. When your unit is low on refrigerant, the pressure drops in the system and the temperature also drops along with it. This will lead to a scenario whereby the evaporator coil gets too cold and freezes up. If you notice that your system is low on refrigerant, be sure to have an expert diagnose it for any leaks before you refill your container with the refrigerant.

Dirty Air Filters

If your outdoor unit is frozen and you can’t remember the last time that you changed/cleaned your air filters, then you might have identified the problem already. Dirty air filters usually restrict the air flow through your system which can lead to this problem. If you change or clean your air filters according to the recommendations of the manufacturer, then you are safe. A typical AC unit consists of an indoor and outdoor unit.

The indoor unit usually has an evaporator coil where the compressor sits. When a dirty filter restricts air flow between these two components, there will be no enough air passing through your system to transfer heat from your indoor air spaces to the refrigerant. This means that the refrigerant will stay colder than usual leading to a freeze up.

Damaged Blower Fan

Your AC Unit’s blower fan helps to get the cold air where it needs to go and transfer the warm air to the outside. However, as the air cools inside your unit, it tends to become denser and can no longer travel well. Your system depends on the blower fan to create cool air and push it out. Sometimes, the blower fan can break or malfunction leading to significant changes in the airflow inside your unit. Too much condensation will build up on the coils which can lead to AC freeze up.

Superior HVAC Services

At P&M, we fix all types of air conditioning issues for residents and businesses in the larger Houston area including air conditioning freeze ups. We are a BBB accredited business with an A+ rating. We offer 24/7 emergency service and guarantee customer satisfaction. Contact us today and let us help you keep your home comfortable during this summer.