Furnace & heating
AC repair
Heat pumps
Ductless mini splits
Carrier
Trane
GoodmanSeasonal 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.
Get your free estimateFast, Reliable Furnace Repair Across Dunwoody
Furnace repair in Dunwoody typically runs $150 – $700 depending on the failed part, and our techs reach most Dunwoody neighborhoods the same day you call. If your heat won’t kick on in a 1970s two-story off Mount Vernon Road, or a crawlspace unit near Perimeter Mall is short-cycling, we’ll diagnose it, put the price in writing before any work starts, and stand behind the repair for a full year. Call (229) 537-2086 and a live person answers, day or night.
We know Dunwoody homes. Not the generic idea of them. The actual stock here: single-family detached houses built from the 1970s through the 1990s, many with original flex duct in attics, crawlspace foundations, and high-end renovations layered on top. That combination creates furnace problems you won’t find in a new-construction subdivision in nearby Milton. We’ll get into that below, but first: here’s who’s showing up and what the job costs.
Key Takeaways
- Furnace repair in Dunwoody: $150 – $700, written price before any work begins.
- Heat pump repair: $150 – $650, common in Dunwoody’s all-electric and dual-fuel homes.
- Every repair carries a 365-day written guarantee. If it fails, we return at no charge.
- We service Carrier, Trane, Lennox, and Goodman furnaces, among others.
- Call (229) 537-2086. Live person answers 24/7.
Styles & brands we work with
Why Dalton Heating & Air Alpharetta Is Dunwoody’s Preferred Furnace Repair Company
Dunwoody homeowners call us because they’ve been burned before. A tech no-shows. A quote over the phone turns into a different number at the door. A repair holds for three weeks, then fails, and the company won’t return the call. We built our operation to be the opposite of that, and we’ve held to it since 2003 as part of The Garrison Standard.
Marco Benitez leads our team, and he runs it by 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. Not as a promise. As policy. Every tech who rolls into Dunwoody is background-checked, uniformed, and factory-trained on nine major HVAC brands. You’ll know the name and face before the truck pulls up.
Response time to Dunwoody matters because a cold house in January is not a minor inconvenience. Dispatch coordinates from our Atlanta office, and crews stage locally. Most Dunwoody calls get same-day service when the problem is urgent. We don’t charge overtime for evening or weekend furnace calls. The price is the price, and it’s in writing.
Heat Pump Repair in Dunwoody
Heat pump repair in Dunwoody usually runs $150 – $650, and in this city it’s rarely as simple as swapping a capacitor. Many Dunwoody homes built in the 1980s use heat pumps paired with original air handlers in the attic, pushing air through flex duct that’s been in place for 40 years. When the heat pump fails, the root cause is often the ductwork and the refrigerant circuit together, not one isolated part. We diagnose the full system before we quote anything, because fixing the symptom without fixing the airflow problem means you’ll call us again in six weeks.
Refrigerant and Airflow Diagnostics
A heat pump that blows lukewarm air in winter may be low on refrigerant, or it may be fighting a collapsed duct run. In Dunwoody’s attic-installed systems, we check both before recommending a repair. This is how we avoid the cycle where a homeowner pays for a refrigerant recharge, then a new blower motor, then a new thermostat, and the upstairs is still cold.
Defrost Board and Reversing Valve Work
During mild Dunwoody winters, heat pumps cycle through defrost regularly. When the defrost board fails, the outdoor coil ices over and the system runs inefficiently. When the reversing valve sticks, the system may heat when you want cooling or vice versa. Both are repairable on site in most cases, and both are covered by our year-long written guarantee.
Heating Repair in Dunwoody
Heating repair in Dunwoody spans $150 – $700 depending on the component that failed, and the city’s housing stock shapes what fails most. Original gas furnaces from the 1970s and 1980s are common here, and many have been maintained just enough to keep running. When a limit switch trips, a gas valve sticks, or an ignitor cracks, the unit is usually old enough that the real question is whether the repair makes sense or whether the money should go toward a replacement system. We’ll give you an honest answer, in writing, with both numbers.
Gas Valve and Ignitor Replacement
A furnace that won’t light often points to a failed ignitor or a gas valve that won’t open. In Dunwoody’s older homes, we also see gas valves corroded from crawlspace humidity. We carry common Carrier, Trane, Lennox, and Goodman parts on our trucks, which means many calls are fixed in one visit.
Blower Motor and Limit Switch Repairs
When a furnace short-cycles in a Dunwoody home, the high-limit switch is doing its job: the furnace is overheating. The usual culprits are an oversized blower motor that was replaced incorrectly years ago, or restricted airflow from kinked flex duct in the attic. We don’t just reset the switch. We find why it tripped.
Trusted Brands We Service in Dunwoody
Our techs are factory-trained on Carrier, Trane, Lennox, and Goodman equipment, along with five other major brands. That matters in Dunwoody because we see a lot of high-end Carrier and Trane systems in renovated homes, and a lot of original Goodman and Lennox units still chugging along in untouched ones. We stock common parts for these brands locally, which shortens most repair timelines. If your system needs a part we don’t carry on the truck, we order it and schedule the return visit inside a specific window, not a vague “sometime next week.”
Common Furnace Repair Problems We See in Dunwoody Homes
- Short-cycling from oversized blowers and kinked flex duct. Dunwoody’s larger homes often have original blower motors matched to old duct runs. When a homeowner replaces the blower with a higher-capacity unit, the increased static pressure trips the high-limit switch on mild winter days. We correct the airflow problem, not just the symptom.
- Multi-zone dampers stuck open after years of attic humidity. Two-story Dunwoody homes with zone systems frequently have dampers that seize in position. One floor roasts while the other stays cold. We test every damper on a zone call and replace seized actuators on the spot when possible.
- Condensate lines clogged with pollen and mold. Dunwoody’s spring pollen load is heavy, and it finds its way into drain lines. When a furnace or heat pump runs in defrost or cooling mode, a clogged line backs up water into the crawlspace or finished basement. We clear lines and install safeguards to prevent recurrence.
- Cracked heat exchangers in original 1980s furnaces. We don’t see these every week, but when we do, it’s serious. A cracked heat exchanger can leak carbon monoxide into living space. If we find one, we shut the furnace down and walk you through replacement options. This is not a repair we patch and walk away from.
See the difference
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After
Before
After
Before
AfterWhy Dunwoody’s Homes Need a Different Kind of Furnace Repair
Here’s what you won’t get from a generic HVAC company: an understanding of how Dunwoody’s specific housing stock changes the repair equation. Most of the city’s single-family homes went up between the 1970s and the 1990s. Builders ran flex duct through attics and crawlspaces, sized for the equipment of that era. Decades later, homeowners renovate. They add square footage, upgrade kitchens, finish basements. But the ductwork in the attic stays original. It sags, kinks, separates at the joints, and leaks conditioned air into unconditioned space. Then the furnace gets blamed for a problem the ductwork created.
On Mount Vernon Road, our techs diagnosed a Trane furnace short-cycling in a renovated 1980s two-story: a weak capacitor and incorrect refrigerant charge on the paired heat pump, compounded by a collapsed flex duct in the attic. We replaced the capacitor, corrected the charge, and sealed the duct, restoring even heat and cutting the homeowner’s gas bill. That job took a morning. It required understanding the whole system, not just swapping the part that was visibly broken. This is the kind of repair Dunwoody homes need more often than any other kind.
Neighboring cities like Sandy Springs have more new construction with rigid ductwork and modern static pressure design. Dunwoody is different. A furnace repair here routinely means resolving airflow and humidity problems that a newer home never develops. If your heat is uneven, your upstairs is cold, or your gas bill keeps climbing while the thermostat stays set, the furnace is probably only part of the story. We diagnose the whole system before we write the quote.
Pricing for Furnace Repair in Dunwoody, GA
| Service | Typical Price Range |
|---|---|
| Furnace Repair | $150 – $700 |
| Heat Pump Repair | $150 – $650 |
| Heating Repair (general) | $150 – $700 |
These are the ranges our Dunwoody customers actually pay. The low end covers an ignitor, flame sensor, or capacitor replacement. The high end covers a blower motor, gas valve, or control board on a higher-end system. What affects the price most is the part cost and the difficulty of access, which is why attic-installed units in Dunwoody sometimes run slightly higher than basement units elsewhere. Every quote is in writing before any work starts. Call (229) 537-2086 for a free estimate over the phone, and we’ll give you a number to plan around, not a vague “we’ll see when we get there.”
We Also Serve Cities Near Dunwoody
Our Furnace Repair team covers the surrounding area as well. We routinely send techs to Alpharetta, Milton, Duluth, and Sugar Hill. If you’re in any of those cities or elsewhere around Dunwoody, the same pricing, guarantee, and same-day response applies.
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 Furnace Repair in Dunwoody
The high-limit switch trips because the furnace is overheating, and in Dunwoody the usual cause is restricted airflow from kinked flex duct or an oversized blower motor fighting the original ductwork. On mild winter days the furnace runs in short bursts, which makes the airflow restriction more likely to trigger the limit. We fix this by correcting the airflow problem, not by replacing the switch and hoping for the best. Call (229) 537-2086 for a duct and blower evaluation.
Yes, and it’s extremely common in Dunwoody’s two-story homes from the 1970s and 1980s. The problem is usually a stuck zone damper in the attic, or a collapsed flex duct run serving the upstairs. Humid attic conditions cause damper actuators to seize, and original flex duct sags over time. We test every damper and inspect the duct runs before quoting a repair. Fixing this often restores even heat without replacing either furnace.
Dunwoody’s heavy spring pollen and humid summers clog condensate drain lines and coat blower wheels, which reduces airflow and triggers limit switch faults in winter. We see this constantly in crawlspace and attic systems. Our repairs include checking and clearing the drain path, because a furnace that works fine in October can fail in January because of what accumulated in April.
If your furnace’s heat exchanger is intact and the repair is under $700, repairing usually makes sense. But if the unit is original to a 1980s Dunwoody home and facing its third repair in two years, replacement is worth considering. Dunwoody’s mild winters make heat pumps a strong option, especially with current rebates. We’ll give you the repair quote and the replacement quote side by side, in writing. Call (229) 537-2086 for an honest comparison.
The smell is almost always mold or mildew on the blower wheel or in the ductwork, which is common in Dunwoody’s humid crawlspaces and attics. Furnaces that sit idle through the fall collect moisture on surfaces, and the first heating cycle blows that odor into the house. We clean the blower, treat the coil, and recommend filtration upgrades if it’s a recurring problem.
Call Dalton Heating & Air Alpharetta for Furnace Repair in Dunwoody
If your furnace is down in Dunwoody, call (229) 537-2086 now. A live person answers. We’ll schedule a same-day visit in most cases, and the tech who shows up will be in uniform, background-checked, and ready to put the entire repair in writing before touching the equipment. Every repair is guaranteed for a full year. If it fails in that year, we return at no charge. That’s The Garrison Standard, and it applies to every furnace call in Dunwoody.
Written by Marco Benitez, Owner at Dalton Heating & Air Alpharetta, serving Dunwoody and surrounding areas.