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Diagnosis first, numbers second - you approve the repair price before a single part goes in.
Get your free estimateFast, Reliable AC Repair Across Dunwoody
AC repair in Dunwoody typically runs $150 – $650 depending on the part and system. Most capacitor replacements, refrigerant recharges, and fan motor fixes are done same-day by our AC Repair team. We know Dunwoody’s homes, and we know what fails in them.

If your system is blowing warm air, short-cycling, or making noise it shouldn’t, call (229) 537-2086. A live person answers 24/7, and we’ll get a background-checked technician to your door inside the window we give you. No voicemail queue. No callback wait.
Dunwoody presents a specific set of AC problems. The housing stock leans heavily toward single-family homes built between the 1970s and 1990s, and many still run original flex duct in attics and crawlspaces. That ductwork is now 30 to 50 years old. It collapses, kinks, and leaks. The result is uneven cooling, high humidity inside finished spaces, and systems that run constantly but never satisfy the thermostat. This is the repair playbook most generic AC pages miss, and it’s exactly where we start on every Dunwoody call.
Why Dalton Heating & Air Alpharetta Is Dunwoody’s Preferred AC Repair Company
Dalton Heating & Air is a Garrison Partners company operating under The Garrison Standard since 2003. Marco Benitez leads our team, and every technician who rolls into Dunwoody is background-checked, uniformed, and factory-trained to service nine major residential brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. You’ll know exactly who is coming before they arrive.
Dunwoody homeowners call us because we put the price in writing before any work starts, on every job, without exception. That’s The Garrison Code: arrive inside the stated window, price in writing before starting, do the job by the book, leave the site clean, and stand behind the work for a full year. The repair is guaranteed in writing for a full year. If it fails in that time, we return at no charge. That’s the 365-Day Done Right Promise, and it’s not an upgrade. It’s included.
Our dispatchers coordinate Dunwoody calls from the brand’s Atlanta metro office, and our crews know the area well: Mount Vernon Road, Chamblee-Dunwoody Road, the neighborhoods around Dunwoody Village, Perimeter Center, and the Georgetown area. Response time to Dunwoody is typically under two hours for emergency calls during business hours.
Styles & brands we work with







AC Capacitor Replacement in Dunwoody
AC capacitor replacement in Dunwoody is one of the most common repairs we perform in the city’s older housing stock, and it typically runs $150 – $350. The capacitor is the electrical component that gives your compressor and fan motor the starting jolt they need to spin up. When it weakens from years of Georgia heat, the system struggles to start, short-cycles, or runs the blower without cooling.
A Dunwoody homeowner usually needs a capacitor replacement when the outside unit hums but the fan won’t turn, or when the AC kicks on and off every few minutes. Our techs test the capacitor on every call with a multimeter. It takes five minutes. If the reading is below the rated range, we show you the reading and quote the replacement in writing before touching a wrench.
Weak Capacitor Symptoms in Dunwoody’s Climate
Dunwoody’s hot, humid summers push capacitors hard. The heat inside the condenser cabinet degrades the dielectric fluid inside the capacitor over time. Homes off Ashford Dunwoody Road and Mount Vernon Road with original outdoor units often see capacitors fail in the July-to-September stretch. If your outdoor unit is humming without spinning, or if the system starts and stops in under ten minutes, the capacitor is the first thing we check.
What a Capacitor Replacement Actually Costs Here
In Dunwoody, the part itself is generally $20 – $60 for a dual-run capacitor on a common Trane or Goodman condenser. The rest is labor and the service call. We charge $150 – $350 total, depending on the tonnage and whether it’s a single or dual capacitor. The price is in writing before we start, and the repair is covered by the written one-year guarantee.
AC Recharge in Dunwoody
AC recharge in Dunwoody, also called a refrigerant recharge, means topping off the cooling fluid your system needs to pull heat out of the house. It typically runs $200 – $650, and it’s the repair that gets a system blowing cold again when the refrigerant level has dropped from a slow leak. In Dunwoody, we see this constantly on older systems that were installed when refrigerant was cheap and leaks were tolerated.
Here’s the trade truth: refrigerant doesn’t get “used up.” If your system is low, there’s a leak. Adding refrigerant without finding the leak is a stopgap. That said, a recharge is still the fastest way to get a struggling system cooling again, and it buys time while you decide on a larger repair. We always pressure-test and locate the leak after the recharge, then quote the fix as a separate line item if you want it.
When a Dunwoody Home Needs a Recharge
You’ll notice it when the air blowing from your vents is cool but not cold, or when the system runs nonstop on a 90-degree Dunwoody afternoon and still won’t hit setpoint. A frozen evaporator coil is another tell: if there’s ice on the indoor coil or the copper line at the outside unit is sweating and frosting, your refrigerant charge is almost certainly off. In that case, shut the system off and call us before the ice thaws into your finished ceiling.

Refrigerant Types and Dunwoody’s Older Systems
A lot of Dunwoody homes built through the late 2000s run on R-22, which the EPA phased out of new production in 2020. That means recharging an R-22 system costs more, because the remaining supply is reclaimed and recycled. Newer systems use R-410A or A2L refrigerants. We’ll tell you which one you have before recommending anything, and the recharge quote is a flat written price, not an hourly gamble.
Trusted Brands We Service in Dunwoody
Our techs carry parts for Trane, Lennox, Goodman, and Rheem systems on the truck, which covers the majority of what’s installed in Dunwoody’s 1970s-1990s housing stock. If your system is a less common Bryant or Daikin, we can usually source the part same-day from our metro Atlanta supply network. Factory training across nine brands means we’re not learning on your unit. We know the pressures, the wiring diagrams, and the failure patterns for each one before we open the panel.
See the difference
Before
After
Before
After
Before
AfterCommon AC Repair Problems We See in Dunwoody Homes
- Collapsed flex duct in attics. Original duct runs from the 1970s and 1980s sag, kink, and collapse in Dunwoody attics, starving rooms of airflow. A compressor can be running perfectly while one bedroom stays 8°F warmer than the rest of the house.
- Frozen evaporator coils from high humidity. Dunwoody’s summer humidity overwhelms undersized or leaky duct systems. The coil ices over, airflow drops further, and the system starts dripping into finished ceilings below attic air handlers.
- Short-cycling condensers on humid shoulder days. Multi-zone additions with mismatched tonnage cause the outside unit to kick on and off too frequently in mild, muggy weather. That pattern kills compressors years early.
- Blower motors that never stop running. We see this on systems where the thermostat is working fine but the duct leaks are so bad the system can’t satisfy the setpoint. The blower runs constantly, pulling humid attic air into the ducts and pushing energy bills up.
Pricing for AC Repair in Dunwoody, GA
Here are the straight numbers for the most common Dunwoody repairs:
| Repair Type | Typical Dunwoody Price Range |
|---|---|
| AC Repair (general diagnostic + fix) | $150 – $650 |
| AC Capacitor Replacement | $150 – $350 |
| AC Recharge (refrigerant top-off) | $200 – $650 |
What moves the price within those ranges? The part, the refrigerant type (R-22 costs more than R-410A), and the distance to the nearest supply house if the part isn’t on the truck. You’ll always see the total written down before any work begins, and the estimate is free. Call (229) 537-2086 for an exact quote.
We don’t charge a diagnosis fee that magically doubles once we find the problem. The number on the written quote is the number you pay. That’s The Garrison Standard, and it applies on every call in Dunwoody.
We Also Serve Cities Near Dunwoody
Dalton Heating & Air runs AC Repair in Dunwoody and the surrounding metro area. The same crews also cover Alpharetta, Milton, Duluth, and Sugar Hill. If you’re a few minutes outside our Dunwoody core, call anyway. Dispatch can usually route a truck to your neighborhood inside the same service window.
Serving Dunwoody, GA - Our Local Coverage Area
We’re based in the Dunwoody area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About AC Repair in Dunwoody
The most common reason in Dunwoody is collapsed or kinked flex duct in the attic, not a failing compressor. Homes built in the 1970s and 1980s often have long flex duct runs that sag and collapse from decades of heat. The upstairs stops getting airflow, the thermostat is on the main floor, and the temperature difference hits 6 – 10°F. We find this on roughly half the Dunwoody calls with upstairs comfort complaints. The fix is usually duct repair or replacement, sometimes paired with zoning. Call (229) 537-2086 and we’ll trace the airflow before we touch the unit.
Most capacitors last 5 to 10 years, but Dunwoody’s heat can shorten that by a few seasons, especially on condenser units that sit in direct sun. A weak capacitor often fails on the hottest day of the year, because that’s when it’s working hardest. If your system is over 8 years old and you’ve never replaced the capacitor, it’s worth a proactive test. We test capacitors on every tune-up and won’t recommend replacement unless the reading is measurably below rated range.
For a larger Dunwoody home with multiple zones, 16 SEER2 is the practical starting point, and 18 SEER2 or higher makes sense if you’re adding dehumidification or running two systems. The 2023 DOE minimums pushed new equipment to 14.3 SEER2 in the South, but that’s a floor, not a recommendation for a 3,000-square-foot house. We’ll walk you through the numbers for your specific square footage and duct layout before quoting any equipment. Call for a written proposal.
Yes, but it usually cools the whole house poorly rather than making one room worse than another. A low charge reduces the coil’s ability to pull heat out of the air, so every room suffers. Uneven room-to-room differences in Dunwoody are more commonly a duct problem. That said, a slow leak on a long line set can starve the rooms farthest from the air handler first, which mimics a duct issue. We pressure-test on every recharge call to rule it out.
Short-cycling on mild days usually means the system is oversized for the humid shoulder seasons, or the thermostat is in a spot that reads temperature differently than the rooms do. In Dunwoody, we see this a lot on homes with a single large unit serving both floors and a thermostat in a warmer ground-floor hallway. The system satisfies the thermostat in five minutes, shuts off, and leaves the upstairs humid and stale. The fix can be as simple as rewiring for a shorter cycle or as involved as adding a second zone. We’ll diagnose it before quoting anything.
If your AC is doing something it shouldn’t be doing – or not doing something it should – call (229) 537-2086. A live person answers 24/7. The price is in writing before we start. The repair is guaranteed for a full year. That’s how we work in Dunwoody.
Written by Marco Benitez, Owner at Dalton Heating & Air Alpharetta, serving Dunwoody and the surrounding metro since 2003.