A freezing AC is one of the most common issues Texas homeowners deal with. With only a few possible causes, the solution to a frozen AC is generally just a little bit of knowledge away. The professionals here at Comfort Boys Service Company are happy to provide it.
What’s A Frozen AC?
If you’re a new homeowner, or just lucky, you may have never encountered a frozen AC in the first place. It might be confusing imagining how an HVAC system might “freeze” – especially during a Texas summer!
A frozen AC occurs when a fault in the system allows internal temperatures to drop below freezing, which causes water vapor to condense and freeze around the evaporator or condenser coils.
Read on to learn more about the main causes of a frozen air conditioner.
A properly functioning HVAC system requires consistent, unrestricted airflow throughout the system. An AC system functions as a balance of airflow, evaporation and heat transfer. Without proper airflow, condensation could collect on your evaporator coils and freeze.
Dirty filters are one of the most significant factors contributing to poor airflow and thus, a frozen system. It’s recommended by most HVAC system manufacturers that you change your filters quarterly and schedule a tune-up at least once a year. Every design will have different requirements based on environment and usage.
Inadequate Refrigerant Levels
Refrigerant provides the chemical mechanism that allows an HVAC system to function. Its ability to transfer heat makes it ideal for refrigeration. Without proper refrigerant levels, condensation may start freezing throughout your system, specifically outside on the condenser coils.
Low refrigerant levels are typically a sign of a leak somewhere in the system and should be addressed before it worsens. Luckily, our technicians are some of the best in the business regarding refrigerant leak detection and can skillfully repair your system to make it leak-free in no time.
Bad Blower Fan
Another common suspect when it comes to poor airflow, the blower fan is the actual unit that forces air through your system. Without it, there is no airflow and your system is bound to freeze.
How To Repair A Frozen AC
Because the problem is just a bit of frozen water, you might be asking yourself, “can you thaw a frozen AC yourself?” The answer is yes! Sometimes. In general, low refrigerant levels can cause your outdoor condenser coils to freeze and airflow problems can cause your indoor evaporator coils to freeze. Some airflow issues can be fixed with a little bit of know-how while most refrigerant issues are best left to the professionals.
To troubleshoot a frozen AC to find out if the problem is fixable via DIY methods, follow the following steps:
- Turn off the system.
- Allow all ice to thaw completely (this can take up to 24 hours).
- Check air filters and replace them if needed.
- Check the evaporator coil for buildup.
- Clean the evaporator coil if needed using compressed air or a water/detergent mix.
- Check ductwork for visible faults.
- Check registers for blockages.
After following all these steps, turn your system on to see if the freezing persists. If so, it’s probably time to contact one of the professionals here at Comfort Boys for the most consistent and highest-quality San Antonio AC repairs.
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Our goal is to become your go-to authority when it comes to all things HVAC. If you need anything — information or service, repair, maintenance or replacement — don’t hesitate to give us a call!