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 Marietta
Furnace repair in Marietta typically costs between $150 and $700 depending on what’s failed, and most repairs can be completed the same day our technician arrives. We cover every corner of Marietta, from the historic districts near the Square to the subdivisions spreading east toward Sandy Plains Road. You’ll get a written price before we open a single tool, and every repair carries our 365-Day Done Right Promise in writing. Call (762) 240-5599 and a real person answers, day or night.
We know Marietta’s homes because we’ve worked in most of them over the years. The 1950s rancher off Whitlock Avenue, the 1990s two-story off Roswell Road, the early-2000s builder-grade homes east of I-75 near East Cobb. Each has its own set of furnace problems, and we’ve seen them all. No call center, no runaround. Just a technician who knows the area and the equipment.
Why Cold Harbour Heating and Air Marietta Is Marietta’s Preferred Furnace Repair Company
We’re an independently owned and operated member of the Kingswell network, which means we hold ourselves to written standards most companies won’t put on paper. Every furnace repair in Marietta starts with a firm arrival window and a price quote handed to you before work begins. That’s not a policy we apply when it’s convenient. It’s the Kingswell Way, and it applies to every job.
Victor Mancini, who leads our team, built Cold Harbour around a simple idea: a furnace repair company should write down what it promises, then do exactly that. A cold harbour was a roadside shelter where travelers waited out bad weather. Comfort in any season is the job. That’s why our 365-Day Done Right Promise is handed to every Marietta customer in writing. If a repair fails within a full year, we come back and make it right at no charge. No argument, no fine print, no chasing us down.
Our technicians show up in uniform, background-checked, and trained to work on nine major residential HVAC brands including Carrier, Trane, Lennox, and Goodman. When you call Furnace Repair in Marietta, the person on the other end knows the area and can tell you honestly whether you need a repair or something bigger.
Styles & brands we work with
Heating Repair in Marietta
Heating Repair in Marietta usually means one of two things: the furnace runs but won’t heat properly, or it won’t run at all. Given the mix of aging 1950s-70s ranch homes and early-2000s builder-grade houses across the east side, we see a lot of both. The fix can be as simple as an ignitor replacement ($150-$280) or as involved as a blower motor or gas valve replacement ($400-$700). Before we diagnose anything, you’ll have a written quote in hand.
On a cold January night when the temperature dips below freezing, a furnace that quits isn’t a minor inconvenience. It’s a health risk for older residents and young children. We get that, which is why we answer the phone at 2 a.m. and dispatch a technician to Marietta without an overtime surcharge. The price we quote is the price you pay, regardless of the hour.
Ignitor and Gas Valve Work
Most furnace ignitor replacements in Marietta run $150-$280, parts and labor included. A gas valve replacement typically lands between $350 and $550. These are the two parts that fail most often when a furnace cycles on but never fires. We stock common ignitors and valves for Trane, Lennox, Goodman, and Rheem systems on our trucks, so we can often finish the job on the first visit.
Blower Motor and Heat Exchanger Repairs
Blower motor repairs in Marietta homes usually run $400-$650 depending on whether it’s a single-speed or variable-speed motor. Heat exchanger repairs are less common but more serious, and if we find a crack during a tune-up or repair, we’ll show you exactly what we’re seeing. In some cases, especially with older systems, replacement makes more financial sense than patching a failing component. We’ll walk you through the math honestly, without pushing you into anything.
Boiler Repair in Marietta
Boiler Repair in Marietta is a specialized call we handle for the city’s older neighborhoods, particularly the historic districts and 1950s-60s ranchers that still run hydronic systems. Boiler repairs typically cost $150-$700, similar to furnace work. Most boiler issues in this area come down to three things: a failing circulator pump, a blocked or leaking expansion tank, or air trapped in the lines. None of these are DIY fixes, and getting them wrong can flood a basement or crawlspace.
If you’ve got radiators that heat unevenly or a boiler that’s pressurizing oddly, call us before it becomes a bigger problem. We’ll diagnose the issue and hand you a written price before turning a wrench.
Circulator Pump and Expansion Tank Repairs
A failing circulator pump is the most common boiler repair we see in Marietta. It usually presents as cold radiators on one end of the house while the other stays warm. The fix is generally straightforward and we carry common pump models on the truck. Expansion tank issues are trickier; a waterlogged tank can cause pressure spikes that stress the whole system. We’ll check both, along with the zone valves, in a single visit.
Bleeding and Flushing Hydronic Systems
Air in the lines causes gurgling noises and lukewarm radiators. We’ll bleed the system, flush it if corrosion is present, and refill it to correct pressure. For Marietta’s older boilers, this kind of maintenance extends the system’s life noticeably. Most of these calls run between $200 and $450.
Trusted Brands We Service in Marietta
Our technicians are factory-trained on nine major residential HVAC brands, and in Marietta we service Trane, Lennox, Goodman, and Rheem systems most frequently. Because we stock common replacement parts locally for these brands at Coldharbour Heating & Air, many furnace repairs are completed on the first appointment rather than waiting for a parts order. That means less time without heat and fewer return trips. Furnace Repair in Marietta homes is what we do, day in and day out.
Common Furnace Repair Problems We See in Marietta Homes
- Short-cycling and cracked heat exchangers in 1950s-70s ranch houses: Oversized furnaces on original, leaky ductwork cycle on and off rapidly, which expands and contracts the heat exchanger metal until it cracks. We catch this during tune-ups and show you photographic proof before recommending anything.
- Capacitor failures after humid Georgia summers: Attic-installed horizontal units sweat through muggy nights, and that moisture seeps into the blower compartment where capacitors live. The capacitor fails on the first cold-start of autumn, and the furnace won’t spin up.
- High static pressure from room additions: When a homeowner converts a carport or adds a bedroom over the garage, the original ductwork rarely gets rebalanced. The blower motor strains against elevated static pressure and eventually fails, or the limit switch trips repeatedly.
- Uneven heat in single-zone east Marietta homes: Early-2000s builder-grade houses often have one zone covering high-ceiling great rooms and small bedrooms alike. Rooms with big windows or vaulted ceilings run noticeably colder, and the thermostat never satisfies evenly.
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AfterPricing for Furnace Repair in Marietta, GA
Furnace repair pricing in Marietta is straightforward, and we publish our ranges so you can plan before you call. A basic ignitor replacement runs $150-$280. A blower motor runs $400-$650. A gas valve or induced draft motor lands between $300 and $550. The full range spans $150 to $700 for residential furnace repairs in Marietta, and you’ll always have a written quote before work begins.
| Repair Type | Typical Marietta Range |
|---|---|
| Furnace Repair | $150 – $700 |
| Boiler Repair | $150 – $700 |
| Heat Exchanger Inspection & Diagnosis | $150 – $350 |
| Ignitor Replacement | $150 – $280 |
You’ll always have a written price before we touch anything. No door-jump adjustments, no “you need this too” surprises. If the repair fails within 365 days, we return and correct it at no charge. That’s the Done Right Promise, on paper, every time. Call (762) 240-5599 for a free estimate on furnace repair in Marietta.
A Note on Ductwork and Airflow in Marietta’s Older Homes
Here’s the part most furnace repair companies won’t tell you: in Marietta, the furnace is often not the real problem. The real problem is the ductwork it’s connected to. Homes built in the 1960s frequently have only one central return in the hallway. Add a bedroom over the garage, convert a carport into a den, and suddenly the furnace can’t breathe. The blower motor works against high static pressure, the limit switch trips, and parts fail early. We see this constantly on furnace repair calls where a single addition throws the system out of balance.
We ran a furnace repair in the historic Whitlock Avenue area where a 1962 ranch had an undersized 4-ton system on original 6-inch ducts. The blower motor was failing from working against high static pressure after a garage conversion added two registers but no return. We corrected the return path and balanced airflow, and the furnace stopped tripping its limit switch. That job wasn’t a part swap. It was a diagnosis of the whole system, and it’s why that furnace is still running four years later.
So before you pay for a new furnace, ask whether your returns can handle the air your current furnace needs to move. We’ll answer that question honestly, with a static pressure reading, not a sales pitch.
We Also Serve Cities Near Marietta
Our Marietta crews also cover the surrounding area with the same written pricing and Done Right Promise. That includes Smyrna, Kennesaw, Powder Springs, and Mableton. If you’re in one of those cities and need furnace help, the process is identical: a live person answers, we schedule a firm window, and you get a written quote before work begins. Dispatch and scheduling are coordinated from the brand’s Atlanta office; crews serve Marietta locally with the speed that comes from knowing the area.
Serving Marietta, GA - Our Local Coverage Area
We’re based in the Marietta 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 Marietta
A furnace that runs nonstop while certain rooms stay cold is almost always an airflow problem, not a heater problem. In Marietta’s older homes, especially 1960s ranchers with a single central return in the hallway, ductwork can’t deliver conditioned air evenly. Rooms added later, like a garage conversion or an upstairs bonus room, make it worse. The fix is often rebalancing returns or adding a return, not replacing the furnace. Call (762) 240-5599 and we’ll diagnose it with a static pressure test.
Usually not, and here’s why: the original furnace may have been oversized or the ductwork may have been undersized from the start. If we bolt in a same-size modern furnace without checking airflow, you’ll pay for efficiency you never get. In many Marietta homes from the 1950s-70s, the right move is a smaller, correctly-sized furnace plus duct sealing. We’ll lay out the options in writing.
Sometimes, yes. Older Marietta homes with 100-amp panels may not have room for a modern variable-speed blower or added heat strips. We’ll check your panel’s capacity during the quote process and tell you if an upgrade is needed before any install work. We don’t surprise you with that charge mid-project.
Attic-installed horizontal furnaces in east Marietta sweat because of the long stretches of humid subtropical heat and high dew points we get each summer. The cabinet cools below dew point, condensation forms, and eventually rust and capacitor failures follow. Adding proper attic ventilation and sealing duct connections helps significantly. We can inspect yours and tell you what’s needed.
For many Marietta homeowners, yes. Our winters are short, but cold snaps do drop below freezing, and a dual-fuel system switching between a heat pump and a gas furnace keeps you comfortable without running the furnace the whole winter. It’s a worthwhile consideration when a furnace needs replacement anyway. We’ll walk you through the actual numbers for your home and your current system.
Call Cold Harbour Heating and Air Marietta Today
If your furnace is acting up in Marietta, don’t wait for the next hard freeze to find out it’s done. Call (762) 240-5599 for a free estimate on furnace repair. We’ll give you a firm arrival window, a written price before work begins, and a 365-day guarantee in writing on every repair we make. A live person answers around the clock, every day of the year. That’s the way it should be.
Written by Victor Mancini, Owner at Cold Harbour Heating and Air Marietta.