Seasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
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AfterFast, Reliable AC Repair Across Dunwoody
AC repair in Dunwoody typically runs $150-$650 and most calls are completed same day by technicians who know the local housing stock. If your system isn’t keeping up, call (817) 402-2972 - a live person answers around the clock, and we’ll give you a written arrival window before we head your way.
We’ve been dispatching crews to Dunwoody from our Atlanta office long enough to know the difference between a quick capacitor swap on a 2015 Goodman and the layered problems hiding in a 1978 split-level off Chamblee-Dunwoody Road. Dunwoody’s homes aren’t generic - they’re two-story traditionals and split-levels from the 1970s through early 1990s, most with original flex duct still routing through 140°F attics and single-zone equipment that never had a prayer of balancing upstairs and downstairs. That structural reality changes what “AC repair” means here versus newer suburbs with modern duct design. Our AC Repair team carries capacitors, contactors, and refrigerant for same-day fixes, but we also bring the duct assessment tools and zoning expertise that actually solve the root problem when a Dunwoody homeowner’s upstairs won’t cool.
Why Coldharbour Heating & Air Is Dunwoody’s Preferred AC Repair Company
We’re independently owned and operated, part of the Kingswell network since 2003, and we serve Dunwoody with the same four written promises that define The Kingswell Way: a price before the work starts, a firm arrival window, a clean job site, and our 365-Day Done Right Promise in writing on every repair.
Our technicians are background-checked, uniformed, and trained on nine major residential brands - Trane, Lennox, Goodman, Rheem, Carrier, York, Daikin, Bryant, and American Standard - so whoever shows up can work on whatever system is already in your home. No sending a junior tech who has to “call the office” when he sees a 25-year-old Rheem heat pump.
Dunwoody’s geography matters to us. We know the Perimeter Center corridor’s rooftop packaged units age differently than the residential systems in Georgetown or Dunwoody Club Forest. We know the afternoon traffic patterns on Ashford Dunwoody Road and Hammond Drive affect our arrival windows, so we build that into our scheduling rather than making you wait through a four-hour “sometime today” block.
And we know the local climate: dew points above 70°F from June through September, attic temperatures that cook flex duct, and that peculiar Dunwoody problem of condensers packed with oak leaf litter and sweet-gum seed pods. That local knowledge means faster diagnosis and fewer callbacks.
AC Not Blowing Cold Air in Dunwoody
AC Not Blowing Cold Air is the most common call we get from Dunwoody homeowners, and it’s rarely just one thing. In a 1970s split-level off Tilly Mill Road, the symptom might trace to a weak capacitor that can’t start the compressor, but the real culprit is often an attic return pulling 140°F air through a crushed flex duct run, so the system never had enough capacity to begin with. Our standard repair range of $150-$650 covers the straightforward fixes - capacitor replacement, contactor swap, refrigerant recharge to factory spec, thermostat recalibration. But we always inspect the duct envelope because in Dunwoody’s housing stock, the mechanical repair without the airflow fix just means you’ll call us again next summer.
Refrigerant Recharge and Leak Detection
A refrigerant recharge (topping off the cooling fluid your AC needs to run) runs toward the lower end of our range when it’s simply low from a slow leak. We use electronic leak detection to find the source - often a corroded Schrader valve or a pinhole in the evaporator coil from years of condensate exposure. We charge to the manufacturer’s subcooling or superheat spec, not just “until the pressures look right.” In Dunwoody’s humidity, an undercharged system can’t wring enough moisture from the air, so you’ll feel sticky even at 72°F.
Compressor and Fan Motor Repair
When the compressor itself fails or the outdoor fan motor seizes, you’re looking at the upper end of our $150-$650 range, sometimes slightly beyond if the unit requires a hard-start kit or contactor upgrade to support the new component. We always check amp draw on the replacement motor against nameplate spec - a motor drawing high amps usually signals restricted airflow or a failing capacitor that will kill the new part in months. In Dunwoody’s debris-heavy environment, we also pull and wash the condenser coil before we leave, because a dirty coil raises head pressure and shortens compressor life.
AC Maintenance in Dunwoody
AC Maintenance in Dunwoody isn’t a luxury - it’s survival math for systems running in 70°F dew points with attic ductwork older than the homeowner. Our tune-up runs $80-$200 and includes a written report of everything we found, not a generic checklist. We check refrigerant charge against factory spec, test all capacitors for microfarad drift, measure static pressure across the evaporator, and inspect the condensate line for the microbial growth that thrives in Dunwoody’s humidity. Most importantly, we pull and wash the condenser coil, because in neighborhoods like Georgetown and Dunwoody Village, the dense hardwood canopy means leaf litter and sweet-gum pods pack the fins so tight you can barely see through them.
What Our Written Report Includes
You get a documented record of refrigerant pressures, temperature splits, amp draws on motors and compressors, and static pressure readings. If your flex duct is crushed or your return is undersized - both epidemic in Dunwoody’s 1970s-1990s stock - we note it with photos and a clear explanation of what’s costing you efficiency. Our technicians are not paid on what they sell, so the recommendation is straight.
SEER2 and Older System Realities
SEER2 is the current efficiency testing standard, and it’s tougher on real-world performance than the old SEER rating. An older Dunwoody system rated at 14 SEER might test closer to 11 under SEER2 conditions, especially with degraded ductwork. Our tune-up report includes an honest assessment of whether your system is worth maintaining for another season or whether the math tilts toward replacement. We don’t push equipment; we show you the numbers.
Trusted Brands We Service in Dunwoody
Our trucks stock common failure parts for Trane, Lennox, Goodman, and Rheem - the four brands we see most often in Dunwoody’s residential stock. Trane’s hard-start kits and contactors, Lennox control boards, Goodman dual capacitors, Rheem pressure switches: these move fast enough that we rarely need to order and return. For less common brands, our Atlanta parts depot turns most items next-day. That matters when your system fails on a Friday evening in July and the forecast shows 94°F with 72°F dew point through the weekend. We also service Carrier, York, Daikin, Bryant, and American Standard with full technical documentation and factory-spec charging curves.
Common AC Repair Problems We See in Dunwoody Homes
- Single-zone systems that can’t balance floors. The original builder put one thermostat downstairs and ran flex duct through a 140°F attic. In Dunwoody’s humidity, that means the upstairs never drops below 76°F while downstairs freezes. A capacitor or refrigerant fix won’t solve a zoning problem.
- Sweating supply boots and microbial growth. When 55°F air hits a leaky boot in a 95°F attic with 70°F dew point outside, condensation forms, feeds mold, and restricts airflow. We see this constantly in Dunwoody Club Forest and the Dunwoody Village area.
- Condensers choked with hardwood debris. Dunwoody’s tree-preservation ordinance keeps the canopy dense. Our techs pull handfuls of oak leaves and sweet-gum pods from condenser fins on routine calls - far more than in cleared-lot suburbs like Alpharetta.
- Heat pump reversing valve failures after ice events. Metro Atlanta’s periodic winter ice storms stress components that otherwise see light use. The valve sticks, the system locks in heat mode, and the homeowner discovers the problem on the first warm spring day.
Pricing for AC Repair in Dunwoody, GA
Most AC repairs in Dunwoody fall between $150 and $650, with the final figure depending on which component failed and whether the root cause is purely mechanical or includes duct or electrical issues. Here’s how our pricing breaks:
| Service | Price Range |
|---|---|
| AC Repair | $150-$650 |
| Tune-Up | $80-$200 |
| AC Installation | $3,500-$7,500 |
A capacitor replacement might land at $180-$260. A refrigerant recharge with leak repair runs $280-$450 depending on refrigerant type and leak location. Compressor or fan motor replacement pushes toward the upper end, and if your system is beyond repair, our AC Installation - Dunwoody team can size a replacement properly for your home. What you won’t get: a price that changes at the door. We hand you a written price before any work begins, and that number is fixed. Estimates are free, and there’s no charge for us to diagnose and explain what we found. Call (817) 402-2972 to schedule.
We Also Serve Cities Near Dunwoody
Our crews work throughout the metro Atlanta area, including AC Repair in Dunwoody and surrounding communities: Atlanta, South Fulton, Sandy Springs, and Roswell. Dispatch and scheduling are coordinated from our Atlanta office, with local technicians assigned by proximity to keep response times tight.
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
It’s almost always both in Dunwoody. The 1970s-1990s two-story and split-level homes here were built as single-zone systems with attic flex duct that has sagged, crushed, or leaked over 40-plus years. A new capacitor or refrigerant charge might help the equipment run better, but it cannot make one thermostat control two floors with damaged ductwork. We assess the mechanical system and the duct envelope, then show you which fix delivers real comfort. Call (817) 402-2972 for a free evaluation.
Twice yearly - spring and fall - because Dunwoody’s dense hardwood canopy and Piedmont humidity create a one-two punch. The debris loads your outdoor coil faster than in cleared suburbs, and the 70°F summer dew points mean your evaporator works harder to wring moisture. A spring tune-up catches capacitor drift and refrigerant leaks before peak season; fall checks the heat pump reversing valve and strips before winter ice events stress them.
Sometimes, if the problem is strictly a failed capacitor, low refrigerant, or stuck contactor. But in Dunwoody’s housing stock, we often find the “not blowing cold” complaint traces to crushed flex duct or an undersized return that starves the evaporator of airflow. Repairing the compressor without fixing the duct is like putting a new engine in a car with a clogged fuel line. We diagnose both and explain what each fix costs and delivers.
Our tune-up covers refrigerant charge verification, capacitor testing, amp draw on all motors, static pressure measurement, condensate line inspection and cleaning, and a full condenser coil wash. SEER2 matters because it’s a tougher real-world test than the old SEER standard. Your older system likely performs 15-20% below its original rating, especially with degraded ductwork. The tune-up report shows you exactly where you stand.
Dunwoody’s municipal tree-preservation ordinance, a core reason the city incorporated in 2008, keeps oak, sweet gum, and tulip poplar canopies dense over most residential lots. The shade is pleasant, but the leaf litter and seed pods pack condenser fins so tight that head pressure spikes and compressors overheat. In newer suburbs with cleared lots and young trees, this simply doesn’t happen. Our techs wash coils as standard practice on every repair and maintenance call.
Written by Victor Mancini, Owner at Coldharbour Heating & Air, serving Dunwoody since 2003.