The unit runs, the fan blows, but the house just won't cool down on a Calhoun summer afternoon. Here is the honest, building-science answer — and why we measure the home before we ever talk about replacing anything.
Updated June 2026 • Written by the team at Anderson Heating, Air & Insulation, serving Calhoun since 1978 🐾
If your AC is running but not cooling, the system has almost always lost the ability to move heat — it hasn't simply died. In Calhoun homes the usual causes are low refrigerant charge (often a slow leak), a dirty or iced coil, a pollen-clogged condenser, leaky or undersized ductwork, or a system that was never matched to the home's heat load. A failed capacitor can also stop the compressor while the fan keeps blowing. The only honest way to know which one it is, is to measure — not guess. And most no-cooling calls are a repair, not a $10,000 replacement.
An air conditioner doesn't make cold. It moves heat — it pulls heat out of the air inside your home and dumps it outside. When the house won't cool, one of two things is happening: the equipment has lost some of its ability to move that heat, or the house is gaining heat faster than the equipment can remove it. A real diagnosis figures out which, instead of assuming the box is bad.
We sit in the Oostanaula river valley, and the building stock around Gordon County tells the story: pre-1950 homes near downtown with retrofitted ducts, mid-century ranches, and newer subdivisions on the perimeter. River-bottom humidity, long stretches of 90-degree afternoons, and decades of pollen all push a marginal system over the edge. A unit that cools fine in May can fall behind in July — not because it "died," but because it was already running on a thin margin that summer erased. That's a measuring problem, not automatically a replacement problem.
Anderson is a building-science company — we treat your house as one connected system. Most HVAC shops in this area own zero blower doors and zero duct blasters; they can only look at the equipment. Anderson runs six blower doors and six duct blasters. That means when your AC won't cool, we can actually prove whether the problem is the equipment, the ductwork, or the house leaking heat — and show you the numbers.
It also means we repair first and replace only when the measurements say a repair won't last or won't pay off. Founder John Anderson learned this the honest way: customers kept telling him their new units were in but the power bill was still sky-high, so he went deeper than the box — into insulation, air sealing, and the building science of the whole home. We'd rather fix a $20 capacitor or seal a leaking return than sell you a system you don't need.
We'll diagnose the real cause and quote the actual job before any work starts — and we'll tell you honestly whether it's a repair or a replacement.
Call (706) 629-0749If the outdoor unit hums and the fan blows but the house won't cool, the AC is usually still trying — it has lost the ability to move heat. The common causes are low refrigerant charge (often a slow leak), a dirty or iced coil, a pollen-clogged condenser, leaky or undersized ductwork, or a system never matched to the home's heat load. A failed capacitor can also stop the compressor while the fan keeps spinning. The honest way to know is to measure temperature split, refrigerant pressures, static pressure, and airflow — not guess.
Warm air only on the hottest afternoons usually means a marginal system — low on charge, a dirty condenser that can't reject heat once it's in the 90s, or restricted airflow. As the Gordon County afternoon peaks, a borderline system loses its small margin. It's a signal to measure charge and airflow, not to assume the unit is worn out.
No. Most no-cooling calls are repairs. We repair first and replace only when the numbers say a repair won't last or won't pay off — a failed capacitor, a cleaned coil, a sealed duct, or a corrected charge can restore full cooling for a fraction of replacement cost. Replacement is right when a compressor fails, a coil leaks beyond repair, or the system is old and badly mismatched — and we'll show you the measurements behind that call.
We treat the home as a system. After checking the obvious electrical and refrigerant items, we can put real instruments on the home — a duct blaster to measure conditioned air leaking out, and a blower door to measure hot air leaking in. Most shops own zero of these tools; Anderson runs six blower doors and six duct blasters, so we can prove whether the problem is the equipment or the house.