A frozen air conditioner—ice covering the evaporator coil or refrigerant lines—is more common than you think, and low refrigerant (commonly referred to as Freon) is one of the primary causes. At Edwards Heating & Air of Acworth, GA, we frequently diagnose issues such as low freon and AC freeze up, and it’s crucial to address it promptly.
Why Low Refrigerant Leads to Freeze‑Ups
Refrigerant moves through your AC system, absorbing heat indoors and releasing it outside. When refrigerant levels are low—typically due to a leak—the pressure inside the evaporator coil drops, causing refrigerant to become excessively cold. Temperatures can drop below freezing, resulting in moisture condensing and forming ice on the coil and lines.
As ice builds, it blocks airflow. With warm air unable to flow over the coil, cooling continues unchecked, and more ice accumulates. This can lead to significant issues such as liquid slugging—where liquid refrigerant returns to the compressor, posing a serious risk of compressor failure. While there is not a quick fix for an AC freezing up there are signs you can look for and preventative measures you can take.
Common Signs of Low Refrigerant
Keep an eye out for these indicators:
- Ice forming on coils or refrigerant lines
- Weak cooling performance or air that isn’t as cold
- Hissing sounds, signaling a possible leak
- Rising energy bills due to reduced efficiency
If you notice these signs, consider them an urgent warning.
Other Causes of AC Freeze Up
Low refrigerant isn’t the only culprit. Other issues that can mimic or exacerbate freeze‑ups include:
- Restricted airflow from dirty filters, blocked vents, or collapsed ducts
- Dirty or coated evaporator coils, insulating cold surfaces and encouraging ice formation
- Malfunctioning blower fans, which reduce airflow
- Blocked condensate drain, which allows moisture to freeze on the coil
Proper diagnosis is essential. The symptoms often overlap, and only a professional can determine the true cause.
Why Edwards Heating & Air Is Acworth’s #1 Local HVAC Choice
When your AC freezes—or anything seems off—Edwards Heating & Air is the trusted local company to call. We stand out for several reasons:
Carrier Factory‑Authorized & NATE‑Certified
As a Carrier® Factory Authorized Dealer, we meet strict standards for licensing, insurance, business ethics, and customer service. Our NATE-certified technicians bring expert training and experience to every job.
24/7 Emergency AC Freeze Up Response
AC issues don’t follow a schedule. Our team is available 24 hours a day, 7 days a week, and can often offer same-day service to get your system back in working order fast.
Honest Pricing & Transparent Service
We believe in upfront quotes and clear communication—explaining the problem, proposed solutions, and associated costs before any work begins. Our A+ rating from the BBB reflects our commitment to integrity and customer satisfaction.
Deep Local Roots
Family-owned since 2001, we’ve built our reputation around serving Acworth and the Metro Atlanta area. That matters to us—we treat your home like our own, delivering small-town service backed by big-company reliability.
Preventive Maintenance Plans
Our comprehensive maintenance plans include refrigerant checks, coil and filter inspections, airflow testing, and system tune-ups. These proactive visits help prevent freeze‑ups before they happen, keeping your system running smoothly all summer long.
What Should You Do If Your AC Freezes Or You Have Low Freon?
- Turn off your system to let all the ice thaw.
- Check and replace your filter if it’s dirty. Ensure vents are open and unblocked.
- If normal airflow conditions return—yet the freeze‑up recurs—it likely stems from low refrigerant or another mechanical fault.
- Call Edwards Heating & Air. Our expert technicians will diagnose the root cause and restore reliable cooling.
Why Is My AC Freezing Up?
Low refrigerant is one of the most common causes of AC freeze‑ups, but airflow problems and mechanical failures can also play a role. Edwards Heating & Air of Acworth delivers certified expertise, fast-response service, honest pricing, and trusted preventive care—all backed by years of local commitment. If your air conditioner freezes—or you just want to avoid that problem call our team or schedule online. We’re here to ensure your comfort, reliability, and peace of mind throughout the cooling season.
