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 Acworth
When your furnace quits on a cold Acworth night, you need a straight answer and a quick fix. Furnace repair in our area typically runs $150 – $700, and most calls from Acworth homeowners are handled the same day. Cold Harbour Heating and Air Marietta keeps technicians on call for Acworth, so when the temperature dips below freezing and your heat won’t kick on, you’re not waiting until Monday. Call us at (762) 240-5599 and you’ll reach a live person, not a voicemail tree.
Our crews know Acworth’s streets. We’re in and out of the neighborhoods off Lake Acworth Drive, the subdivisions spreading out from Cowan Road, and the older ranch homes near downtown. That matters because a furnace acting up in a 1975 split-level on Mitchell Road is usually a different animal from one in a 2010 Craftsman off Mars Hill Road. The house tells a story, and we’ve been reading those stories long enough to get to the real problem fast.
Why Cold Harbour Heating and Air Marietta Is Acworth’s Preferred Furnace Repair Company
Acworth homeowners have learned to read a company’s promises carefully, because plenty of them have been burned before. A no-show. A price that jumped at the door. A repair that quit within the month. Cold Harbour Heating and Air Marietta was built inside the Furnace Repair network called Kingswell, whose whole operating standard is putting those promises in writing. Founded in 2003, we’ve held ourselves to the same four rules on every single job: a written price before any tool comes out, a firm arrival window, a clean job site when we leave, and a guarantee that brings us back free if the repair fails within 365 days.
Our owner, Victor Mancini, insists on the guarantee being handed to you on paper before the technician pulls out of the driveway. Not a verbal nod. Not a “trust me.” A written promise. That’s the difference between a company that hopes you’ll be satisfied and one that’s accountable to you for a full year.
Response to Acworth is measured in hours, not days, because we dispatch from our Atlanta metro office and crews serve Acworth locally. We answer the phone around the clock, every day of the year. When a furnace dies at 11 p.m. and the house is losing heat, the voice on the other end is a human being, not an answering service running out the clock until Monday.
Styles & brands we work with







Gas Furnace Repair in Acworth
Gas Furnace Repair in Acworth handles the most common heating emergency in the city’s housing stock: a furnace that won’t light, won’t stay lit, or starts short-cycling during a cold snap. Homes throughout the city, from the split-levels off Cherokee Street to the newer two-stories near Governors Towne Club, run on natural gas furnaces from Trane, Lennox, Goodman, and Rheem. The work usually means diagnosing the ignition sequence, testing the gas valve, checking the heat exchanger for cracks, and making sure the limit switch isn’t tripping because of an airflow problem. Most gas furnace repairs in Acworth land between $150 and $700, parts and labor included.
Ignitor Replacement in Acworth
A failed ignitor is the single most common repair we make on gas furnaces in Acworth. You’ll hear the draft inducer hum, then nothing. No flame. The ignitor is the small ceramic piece that glows white-hot to light the burner, and after thousands of cycles it simply cracks. A replacement ignitor in this area typically runs $150 – $280, installed the same visit.
Gas Valve Diagnostics Near Lake Acworth
When the ignitor glows but the burner never lights, the gas valve is often the culprit. Older homes near Lake Acworth and downtown Acworth may have original valves that have become sticky or slow to open. Our technicians test the valve with a manometer before recommending replacement, because sometimes the problem is upstream: a spider web in the burner tube or a corroded flame sensor. You’ll get the written price before we do anything. No surprises at the door.
Furnace Tune Up in Acworth
Furnace Tune Up in Acworth is preventive work that pays for itself when the first cold night arrives. A tune-up means cleaning the flame sensor, checking gas pressure, testing the heat exchanger for cracks, inspecting the venting for blockages, and measuring the temperature rise across the system. For Acworth homeowners with 1970s-era furnaces, this is also the visit where we catch the problem that would have left you cold in January. A furnace tune-up here runs $80 – $200, which is a fraction of what an emergency repair costs on a freezing night.
Heat Exchanger Inspection in Acworth
The heat exchanger is the metal chamber that separates the burner’s flame from the air your family breathes. When it cracks, carbon monoxide can enter the home. This is not a scare tactic; it’s a safety check every professional performs, and we treat it with the seriousness it deserves. During a tune-up, we inspect the exchanger visually and with a combustion analyzer. If we find a crack, we’ll show you, and we’ll explain your options in plain English.
Single-Stage System Checkup for Older Homes
Many original furnaces in Acworth’s ranch homes and split-levels are single-stage units that fire at full blast or not at all. The blower motor and limit switch work harder on these systems, and both wear out faster. A tune-up on a single-stage furnace includes testing the motor’s amp draw and verifying the limit switch opens and closes at the correct temperatures. Small catches here prevent big failures later.
Trusted Brands We Service in Acworth
Our technicians are trained on nine major residential HVAC brands, and the trucks are stocked with common parts for the systems Acworth homes actually have. That means a Trane gas valve, a Lennox ignitor, or a Goodman control board is often on the truck when we arrive, not ordered from a warehouse two days out. We service Trane, Lennox, Goodman, and Rheem equipment regularly in this area, along with Carrier, Bryant, York, Daikin, and American Standard. You won’t hear us say “we don’t work on that brand.” We work on what’s in your house.
See the difference
Before
After
Before
After
Before
AfterCommon Furnace Repair Problems We See in Acworth Homes
- Crushed flex duct in 1970s split-levels. Homes near downtown Acworth and off Mitchell Road often have original flex duct runs in the attic that have been flattened by decades of heat and storage. Restoring that duct often fixes the short-cycling that a salesman blamed on the furnace itself.
- Electric furnaces overtaxing aging breaker panels. Original ranches near Main Street and Cherokee Street sometimes still run electric furnaces. When backup heat strips engage, an old panel can trip, and the family wakes up to a cold house with no furnace in sight. The fix is often a panel check before the furnace gets condemned.
- Uneven heating in two-story additions. A 1990s Governor’s Towne Club home with a single-zone system can’t push air evenly to a second floor added years later. Upstairs rooms run 10°F colder, so the thermostat gets cranked, and the blower motor runs itself to death trying to heat a floor it was never sized for.
- Limit switches tripping during Acworth cold snaps. When the temperature drops into the 20s, heat strips and burners work harder. On systems with marginal airflow, the limit switch trips to protect the heat exchanger from overheating. The switch isn’t the problem; the ductwork starving it is.
Pricing for Furnace Repair in Acworth, GA
Furnace repair in the city runs $150 to $700 for most jobs. A simple ignitor swap on a Trane or Goodman sits at the low end. A blower motor replacement or a gas valve on a Lennox lands toward the middle. A heat exchanger repair, where the part and labor are both expensive, reaches the top of the range. The written price you get before the work starts is the price you pay when it’s done. Not a penny more at the door.
Here’s what you can expect for common work in Acworth:
| Service | Typical Range in Acworth |
|---|---|
| Furnace Repair | $150 – $700 |
| Furnace Tune Up | $80 – $200 |
Call (762) 240-5599 for a free estimate on your specific furnace. You’ll get a written number before we touch a single tool.
We Also Serve Cities Near Acworth
Our Furnace Repair in Acworth crews also cover the surrounding communities, because heating problems don’t respect city limits. If you’re in Kennesaw, Woodstock, Marietta, or Holly Springs, we’ll get a technician to your door with the same written guarantee and the same live-person phone answer, any hour of any day.
Serving Acworth, GA - Our Local Coverage Area
We’re based in the Acworth 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 Acworth
Short-cycling on a 1980s split-level in Acworth almost always comes down to airflow, not the filter. The original flex duct in those homes gets crushed or disconnected in the attic over decades, which drives up static pressure and trips the limit switch before the house ever gets warm. A new filter can’t fix a duct run that’s collapsed to half its diameter. We measure static pressure and inspect the duct before we replace any furnace parts.
You can often keep it, but the breaker panel needs to be checked first. Original downtown Acworth ranches with electric furnaces draw heavy current when the heat strips engage, and a 50-year-old panel may not handle the load. If the panel is sound, we’ll repair the furnace and keep it running. If the panel is marginal, we’ll show you exactly why a switch might be wiser, with a written price either way.
No, it won’t, and this is the most expensive misunderstanding we see in Acworth. If upstairs rooms run cold while the main floor roasts, the problem is the duct system and the single-zone layout, not the furnace. Swapping a 90,000 BTU furnace for another 90,000 BTU furnace changes nothing about how the air gets upstairs. You’ll spend five thousand dollars and still sleep cold. We’ll test airflow and show you the pressure readings before anyone sells you a furnace you don’t need.
If you have a heat pump with a gas or electric backup, the system may be entering defrost mode, which briefly blows cool air while the outdoor coil melts ice. That’s normal for a few minutes. If it lasts longer, the reversing valve or the backup heat strips may have failed, and both are repairable. Homes on Lake Acworth’s exposed sides see this more often because wind drives moisture onto the outdoor unit, freezing the coil faster.
Once a year, without exception. A 1970s furnace in a split-level off Cherokee Street or a ranch near Main Street has earned its keep, and it needs an annual combustion check, heat exchanger inspection, and static pressure reading. The blower motor and limit switch on those systems carry the burden of original, undersized ductwork, and catching their wear before a cold snap keeps a $200 tune-up from becoming a $700 emergency repair.
Furnace trouble in Acworth doesn’t wait, and neither should you. Call (762) 240-5599 now and you’ll talk to a live person who can get a background-checked, uniformed technician to your door, hand you a written price before the work starts, and leave you with a written guarantee that covers the repair for a full 365 days. That’s The Kingswell Way, and it’s how we’ve operated since 2003.
Written by Victor Mancini, Owner at Cold Harbour Heating and Air Marietta, serving Acworth since 2003.