As we move further into the Arizona summer, our air conditioners are working even harder to keep us comfortable. One of the more important aspects of your AC unit is the condenser coil, where the heat is removed from the refrigerant. 

As your AC unit works hard to keep you cool, this coil can become frozen and cause your system to fail. Knowing the common causes of a frozen condenser coil can help you diagnose the problem and understand what to do in the event that your condenser coil does freeze.

4 Common Causes of a Frozen Condenser Coil

1- Dirty Filter – A dirty air filter can restrict the air flow in and out of your cooling system. This can cause the coils to get too cold as air is not circulating around them. The more the cold air trapped inside the unit and continually, the more likely the coils will become frozen. 

If you notice your system not cooling your house, be sure to examine your filter and cleaning or replacing it if needed. Doing so should help your system function properly and efficiently. 

2- Blocked Condensate Lines – The function of the condensate lines is to drain excess moisture, or humidity, away from your HVAC system. When these lines are blocked, obviously the water cannot be removed from your system. With nowhere to escape to, the moisture will build up inside the unit and around each part, including the condenser coil. When this moisture freezes, it can cause damage to your unit and force your system to shut down. 

A skilled HVAC technician can diagnose a blocked condensate line and properly unclog it. Regular air conditioning maintenance can help prevent a condensate line from becoming blocked. 

3- Malfunctioning Thermostat – The thermostat controls your cooling & heating systems to regulate the temperature inside your home. It tells the systems when to turn on and off in order to keep you comfortable. A broken thermostat has the possibility to misread the temperature inside and cause your cooling system to be overworked. With an AC system continuously in the “ON” position, it is likely your condenser coils will become frozen. 

If you notice your AC system continuously running with little or no breaks, your thermostat may be causing an issue. Contact your trusted HVAC technician to examine your system and properly diagnose the problem. 

4- Refrigerant Leak – Refrigerant, or commonly called Freon, is the liquid that runs through the coils in your AC unit and pulls the heat from the air before it is returned to your home. When your air conditioner is leaking refrigerant, the system has to work extra hard to remove the heat from the air. This extra work can cause the condenser coils to freeze and shut the system down. 

A refrigerant leak is a serious problem that should always be handled by a trained professional. Contact your local HVAC company immediately if you think your system is leaking refrigerant.

Preventative Maintenance

Routine maintenance of your cooling & heating systems can help prevent frozen condenser coils, along with other common AC problems. Industry standards recommend having your systems examined twice a year by a trained HVAC technician. 

2C’s Cooling & Heating offers quality air conditioning and heating services to the East Valley. Contact our office today if you believe your condenser coils are frozen or to schedule preventive maintenance. Our technicians are licensed HVAC professionals and ready to help you stay comfortable all summer long! 

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About 2C’s Cooling & Heating

2C’s Cooling & Heating proudly serves the East Valley, Arizona with high quality HVAC services. We are here to serve you and all of your cooling and heating needs. Our team is prepared to tackle whatever cooling project you have.