There's a particular frustration to an AC that's clearly running — you can hear it, air is moving — but the house just won't cool down and feels sticky. That symptom points to a short list of common causes, and the trick is testing for each rather than guessing and swapping parts.
In Kennesaw's humidity, 'not cooling' and 'not dehumidifying' often go hand in hand: a system low on refrigerant, a frozen coil, a tripped condensate safety switch, or a failed capacitor can all leave the air warm and damp. We diagnose the actual cause the same day, show you the evidence, and give a written price before any repair.
What 'Not Cooling' Usually Looks Like
These are the patterns we hear most on same-day no-cooling calls:
- The system runs constantly but the house never hits the set temperature
- Vents blow warm or room-temperature air
- The air feels cool but sticky and humid
- Some rooms cool while others stay hot
- The outdoor unit is running but the indoor coil is iced over
- The AC cools early in the day, then quits as it gets hotter
- You lowered the thermostat and nothing changed
How We Track Down Why It's Not Cooling
A structured diagnosis through the usual suspects — not a parts-swapping guess.
- 1
Confirm the symptom & basics
We verify the thermostat settings and mode, check the air filter and breakers, and confirm both the indoor and outdoor units are actually operating — ruling out the simple stuff first.
- 2
Test the cooling chain
We check refrigerant charge and pressures, the capacitor and contactor, the compressor and outdoor fan, coil condition, and airflow — the components that most often leave a system running warm.
- 3
Check the humidity-and-drain side
We inspect the condensate drain and float switch, look for a frozen or dirty coil, and confirm the system is actually pulling moisture out — because in our climate that's frequently part of the problem.
- 4
Explain, price & repair
We show you what we found, give a written price, and — with your approval — make the repair the same day when the part is on the truck, then verify the house is cooling and drying out.
The Most Common Reasons a Kennesaw AC Won't Cool
A failed run capacitor is one of the most frequent — the compressor or fan can't start properly, so the system runs without producing cold air. Low refrigerant from a slow leak is another leader; without enough charge, the coil can't absorb heat and may even freeze over.
Then there's the humidity angle: a clogged condensate drain trips the float switch and shuts cooling down, or a dirty coil and restricted airflow ice the system up. We test all of these because any one of them produces the same 'running but not cooling' complaint.
Why It Cools in the Morning but Quits by Afternoon
A system that cools fine early and then loses ground as the day heats up is often marginal on refrigerant or airflow — it can keep up with a light load but falls behind once the outdoor temperature and humidity peak.
That pattern is a useful clue, and it usually means a real fault rather than an undersized system. We'll confirm which by measuring the charge and airflow under load, so you're fixing the cause, not chasing the symptom.
What a No-Cooling Repair Costs in Kennesaw
The fix depends entirely on the cause. A capacitor is at the low end of the Atlanta-area $150–$650 AC repair range, while a refrigerant recharge on a verified leak ($150–$650) or a compressor issue sits much higher. These are context ranges, not quotes.
That's exactly why we diagnose before pricing. You'll get a clear diagnostic fee up front and a written repair price once we know the real cause — never a number pulled before we've tested the system.
What affects your price:
- The underlying cause — capacitor, refrigerant, coil, drain, or compressor
- Refrigerant type and amount if a leak is confirmed
- Whether a frozen coil needs to thaw before repair
- Age and overall condition of the system
- Same-day or after-hours timing during a heat wave
Why Kennesaw homeowners choose HVAC Kennesaw GA for ac not cooling — same-day service
We’ve spent 15+ years on Cobb County’s systems, and it shows in how we handle a ac not cooling — same-day service call: we test first, explain the reading, and put the price in writing before we touch anything chargeable.
- 4.9★ from 214+ Kennesaw & Cobb County homeowners
- GA Licensed Conditioned-Air Contractor · EPA Section 608 Certified Technicians
- Written options and your approval before any chargeable work
- Same-day service across Kennesaw & Acworth — 24/7 during ice storms and heat waves.
4.9★ Rated
214+ local reviews
Licensed & Insured
GA conditioned-air · EPA 608
24/7 Emergency
Same-day across Kennesaw
15+ Years
Serving Cobb County
AC Not Cooling — Same-Day Service across Kennesaw & Cobb County
We bring ac not cooling — same-day service to homes and businesses throughout Cobb County — from Acworth and Marietta to the East Cobb and West Cobb subdivisions, plus every Kennesaw neighborhood. We’re dispatched from 3600 Kennesaw N Ind Pky, so response times stay short across the area.