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Frozen Air Conditioner? Act Fast!

Is Your AC Freezing Up This Fall? Here’s What to Do


As cooler weather arrives this autumn, ice on your air conditioner might catch you off guard. Though more common in summer, frozen AC units can still occur during fall. At Cornerstone Services in Salem, NH, we’ve helped many customers with frozen ACs and are here to guide you through the issue—and when to call the experts.





Watch for These Signs of a Frozen AC


One of the first signs your AC might be freezing up is warm air blowing from your vents. Other signs include visible ice on the evaporator coils or condenser, or a hissing sound coming from the unit. If you notice any of these signs, it's important to take immediate action and, if needed, reach out to a professional to prevent further damage.


Quick Fixes for a Frozen AC


While there are a few things you can try yourself, be sure to contact the experts at Cornerstone Services if you’re unsure or if these steps don’t resolve the issue:


  • Turn Off the Power – Flip the circuit breaker to prevent further damage. If you’re unsure where it’s located or how to handle it safely, it’s always best to give us a call.


  • Let the Unit Defrost – Depending on the amount of ice, it may take hours or even a day for the system to thaw. If you’re uncomfortable with waiting or monitoring the defrost, contact us for help.


  • Don’t Chip Away the Ice – Attempting to manually remove ice can damage the coils. Instead, let the pros handle it.


  • Run the Fan Only – After the ice melts, switch your system to “fan only” mode for 30 minutes to help dry out the coils. If your system isn’t responding properly, give us a call to check the fan settings.


Why Did This Happen? Common Causes


There are several reasons your AC might freeze up, and some will require professional inspection:


  • Clogged Air Filters: Dirty filters block airflow, leading to freezing. While you can replace your air filters yourself, if freezing continues, it’s best to contact a professional to ensure no deeper issues exist.


  • Low Refrigerant: If refrigerant levels are low, your system won’t function properly. Only licensed HVAC technicians can handle refrigerant issues—so reach out to us if you suspect a leak.


  • Blower Issues: A faulty blower fan can cause airflow problems, which often lead to freezing. This isn’t something you should handle on your own—contact the pros for a thorough check.


  • Leaky Ductwork: Airflow restrictions from leaky ducts can also lead to freezing. Ductwork inspections and repairs are best left to professionals.


Prevent Freezing: Tips for Fall Maintenance


Fall is a great time to prepare your AC for the next season and prevent freezing issues. Here’s what you can do—and when to call Cornerstone Services:


  • Replace your air filters regularly: If you’re unsure how to replace your filters or notice frequent clogging, contact us to inspect for deeper issues.



  • Monitor refrigerant levels: Low refrigerant requires a licensed technician, so be sure to contact us if you suspect a leak.


When to Call the Pros


If your AC continues to freeze after trying these solutions, it’s time to call Cornerstone Services. Our expert team will diagnose the problem and get your system back on track quickly. Don’t risk further damage or costly repairs—let us take care of your frozen AC and ensure everything runs smoothly.


Don’t let a frozen air conditioner disrupt your comfort this fall. Contact Cornerstone Services in Salem, NH, today for professional assistance and to get your system back in top shape.

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