The building-science truth: cooling is heat removal

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.

The most common causes, in order

  • Low refrigerant charge. Refrigerant is the fluid that carries the heat. If a slow leak has dropped the charge, the system can't absorb enough heat indoors — you'll often see longer run times, weak airflow temperature, and on bad days, ice on the lines. Adding refrigerant without finding the leak is a band-aid; the honest fix is to find and seal the leak, then charge to spec by measurement.
  • Dirty or iced evaporator coil. The indoor coil is where heat is absorbed. Caked with dust or starved of airflow, it can't do its job — and can freeze into a block of ice that stops cooling entirely. The fix is cleaning and restoring airflow, not replacing the system.
  • Clogged condenser coil. The outdoor coil rejects heat to the air. Calhoun yards throw a lot at it — spring pollen, cottonwood, grass clippings. A matted condenser can't shed heat once the afternoon climbs into the 90s, which is exactly when you notice the house won't keep up.
  • Leaky or undersized ductwork. This is the one most companies never check. If your ducts leak into a hot attic or crawlspace, you're paying to cool the wrong space — and undersized return air starves the system. We can measure this with a duct blaster instead of guessing.
  • A system never matched to the home. An AC that's too big short-cycles and never dehumidifies; one that's too small never catches up. Both feel like "the AC isn't cooling." This traces back to whether anyone ever ran a real load calculation on the home.
  • Failed capacitor or contactor. A cheap electrical part can stop the compressor while the indoor fan keeps blowing — so the house feels like it's running but only moving warm air. Often a same-day, low-cost repair.

Why this matters more in a Calhoun summer

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.

How Anderson is different: we measure the home, not just the box

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.