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 Furnace Repair Across Dunwoody
Most furnace repairs in Dunwoody run $150 – $700 and our Furnace Repair team can usually get to you same day. Call (984) 538-9003 and you’ll reach a live person, 24/7. We’re familiar with the heating headaches that come with Dunwoody’s older subdivisions, from the brick colonials off Mount Vernon Road to the split-levels near Perimeter Center. Our technicians are background-checked, sent to you by name and photo before arrival, and badged at your door under the Threshold Verified standard.
Why Brandt HVAC Is Dunwoody’s Preferred Furnace Repair Company
We’ve been the company Dunwoody homeowners call when they want to know exactly who is walking through their door. Every Brandt HVAC technician is identity-verified, background-checked, and introduced with a photo before the visit. If someone shows up who you weren’t told to expect, that visit is on us.
Our phones are answered by a live person around the clock, no voicemail trees or callback queues. Dispatch and scheduling are coordinated from our Atlanta office, and crews serve Dunwoody neighborhoods directly. We know the local housing stock: two-story brick colonials and split-levels built during the 1970s-80s Perimeter-area growth wave, many with original flex duct systems still draped through unconditioned attics.
Every repair begins with a written price before any work starts. Every repair also carries a written guarantee: our 365-Day Done Right Promise. If the repair fails, we return at no charge. No argument, no additional fee.
Boiler Repair in Dunwoody
Boiler Repair in Dunwoody covers both hot-water and steam systems still found in older ranch homes and some multi-tenant commercial buildings near Perimeter Center. We handle circulating pump failures, zone valve malfunctions, pressure relief issues, and boiler control board replacements. Most boiler repairs in Dunwoody fall within our $150 – $700 range, though steam-system work can run toward the higher end if multiple zones are involved.
When a Boiler Shows Pressure Trouble
Low pressure or chronic pressure loss usually means a failing expansion tank or a leak in the loop. We pressure-test the entire system, locate the source, and give you a written price before opening any valves.
Zone Control and Circulator Work
Multi-zone boiler systems in Dunwoody’s older homes often suffer from stuck zone valves or worn circulator pumps. We stock common pump and valve sizes to avoid delays, and we test each zone for even heat distribution before we leave.
Gas Furnace Repair in Dunwoody
Gas Furnace Repair in Dunwoody is our most common winter call, and the problems we find here are rarely just the furnace itself. The 1970s-80s subdivisions that define Dunwoody’s housing stock were built with flex duct sized for single-pane windows and minimal insulation. A new furnace can’t move enough air through that original trunk, so it short-cycles on the high-limit switch and the family assumes the heat exchanger failed. Most gas furnace repairs in Dunwoody cost $150 – $700, with ignitor replacements and limit switch repairs toward the lower end and heat exchanger or blower motor work toward the higher end.
Ignitor and Flame Sensor Service
A cold startup that ends in three flashing lights usually means a cracked hot-surface ignitor or a carbon-coated flame sensor. We carry both parts for Goodman, Rheem, and York systems common in this area.
Blower Motor and Airflow Corrections
Weak airflow from your vents can mean a failing blower motor, but it can also mean a return duct collapsed in a 130°F attic. We measure static pressure across the system before we recommend any part.
Trusted Brands We Service in Dunwoody
We repair all major residential furnace brands, including Goodman, Rheem, York, and Daikin units found throughout Dunwoody’s established neighborhoods. Our vans carry common ignitors, blower motors, control boards, and gas valves for these brands, which means most repairs finish in a single visit without waiting on parts. For older systems still running strong in Dunwoody’s 1980s subdivisions, we source OEM and quality aftermarket components to keep them reliable through another heating season.
Common Furnace Repair Problems We See in Dunwoody Homes
- Short-cycling from undersized flex duct. The original flex trunk in your 1970s-80s attic can’t deliver the CFM your furnace needs, so the unit hits its high-limit and shuts down before the house warms. We measure static pressure and often find the duct, not the heat exchanger, is the real failure.
- Single-zone systems in split-level floor plans. One thermostat trying to heat three levels of a Dunwoody split-level off Mount Vernon Road means the basement overheats while the second floor stays cold. Furnace repair alone won’t fix a zoning problem, but we can identify whether the issue is equipment, duct, or control.
- Heat pump condenser coils choked by debris. Dunwoody’s tree-preservation ordinance keeps outdoor units boxed in by un-trimmable shade. Compressors run at elevated head pressure year-round, and condenser coils packed with leaf debris and seed pods fail months before a proper service call would catch them.
- Blower motors running at reduced speed. A failing capacitor or worn motor runs half-speed, can’t push air through restrictive original ductwork, and triggers limit cycles that look like a heat exchanger problem. We test amperage and RPM before condemning any major component.
Pricing for Furnace Repair in Dunwoody, GA
Most furnace repairs in Dunwoody cost between $150 and $700, parts and labor included. An ignitor replacement typically runs $150 – $300. A blower motor replacement or gas valve repair usually falls in the $400 – $700 range. Heat exchanger work, when repairable, can reach the upper end of that spectrum; when replacement is required, we discuss full system options since the labor often approaches the cost of a new furnace.
| Service | Typical Range in Dunwoody |
|---|---|
| Furnace Repair | $150 – $700 |
| Furnace Tune-Up | $80 – $200 |
What moves the price? Accessibility of the unit, whether the part is in stock, and whether we find secondary issues like a blocked condensate drain or failing capacitor during diagnosis. We give you a written price before any work starts, and that price doesn’t change unless you ask us to do additional work. Estimates are free. Call (984) 538-9003 to schedule.
We Also Serve Cities Near Dunwoody
Our Furnace Repair in Dunwoody crews also handle calls in Atlanta, South Fulton, Sandy Springs, and Roswell. Same Threshold Verified standard, same written pricing, same live-answer phones. If you’re in one of these neighboring cities and need furnace repair, we can dispatch from our Atlanta office.
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 original flex duct in your attic was sized for a smaller furnace and less insulation than current standards require. A new, more efficient unit moves more air, but the undersized trunk creates high static pressure that chokes airflow to the second floor. We measure pressure across the system and often find the duct needs modification, not a third furnace.
Yes. Dunwoody’s tree-preservation ordinance keeps many outdoor units in heavily shaded, poorly ventilated side yards where condenser coils accumulate leaf debris and seed pods year-round. Elevated head pressure shortens compressor life and reduces heating capacity on heat pump systems. We clean coils thoroughly and can recommend airflow improvements that don’t violate the ordinance.
Most repairs run $150 – $700, with the average call landing in the $250 – $450 range for common issues like ignitor or flame sensor replacement. We charge a diagnostic fee that applies toward the repair, and we give you a written price before any work begins. Call (984) 538-9003 for a free estimate.
Not completely. A single thermostat in a split-level creates inherent temperature stratification that no furnace repair can solve. We can verify your equipment is running correctly and sized properly, but real comfort usually requires zoning controls or duct modifications. We’ll tell you honestly which path makes sense.
More often it’s the ductwork. We get this call constantly in Dunwoody’s older subdivisions. A cracked heat exchanger is serious and we check it with a combustion analyzer, but restricted or undersized attic duct is the far more common culprit. We measure temperature rise, static pressure, and airflow at each register to isolate the real problem before recommending any major repair.
Written by Devin Marlowe, Owner at Brandt HVAC, serving Dunwoody and the greater Atlanta area.