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Get your free estimateTrusted Furnace Repair for Marietta Homeowners
When a furnace quits on a cold Marietta night, the only thing that matters is getting heat back fast through Furnace Repair - Marietta. Most furnace repairs in Marietta run between $150 and $700, and a written price comes before any work begins. Coldharbour Heating & Air has been fixing furnaces across Cobb County since 2003, and we answer the phone with a live person 24/7 at (762) 240-5599. Whether it’s a dead igniter in a ranch house off Whitlock Avenue or a failed blower motor in a townhome near Kennesaw Mountain, our technician arrives in a set window, diagnoses the problem, and hands you a written price before a single tool comes out. Victor Mancini, our owner, built this company on a simple idea: homeowners deserve a repair that’s priced honestly and backed in writing for a full year.
We’re part of the Kingswell network of independently owned HVAC businesses, which means we answer to the same written standards on every job: say the price, show up in the window, leave the place cleaner than we found it, put the guarantee on paper, and come back if the fix fails. No handshake deals. No hoping the second repair sticks. Just heat that works and a company that stands behind it.
Furnace Maintenance
Furnace Maintenance is the scheduled upkeep that keeps a heating system running safely and efficiently through the Marietta winter, and it’s the single best way to avoid a midnight breakdown. We recommend it once a year, ideally in early fall before the first cold snap hits East Cobb and West Cobb alike. A full maintenance visit runs $80 – $200 and includes cleaning the burners, checking the heat exchanger for cracks, testing the safety switches, and measuring the temperature rise across the system. It’s not a quick filter change and a wave goodbye. We actually inspect the components that fail most often, so small issues get caught before they become $700 repairs.
Annual inspection coverage
Each maintenance visit includes a written report of what we found, what we adjusted, and what might need attention in the next season. Technicians are not paid on what they sell, so the report reflects the system’s actual condition, not a quota. Many Marietta homes built in the 80s and 90s have furnaces nearing the end of their service life, and a yearly inspection is the only reliable way to track that decline.
Extending equipment life
A furnace that’s cleaned and adjusted every year typically runs years longer than one that’s ignored until it breaks. We see the difference constantly: systems in Vinings and our Furnace Repair in Smyrna that received regular maintenance routinely outlast neglected units in the same neighborhoods by five years or more. The math is simple, and the maintenance cost is a fraction of an early replacement.
Styles & brands we work with
Heat Pump Repair
Heat Pump Repair covers the heating function of systems that move warmth rather than burn fuel, and it’s increasingly common throughout Marietta as more homes shift to electric heating. When a heat pump stops heating, the culprit is usually a failed reversing valve, a refrigerant leak, or a control board that’s no longer telling the outdoor unit to defrost. We diagnose all of it, and most repairs fall within the $150 – $700 range. Because heat pumps run year-round for both heating and cooling, wear shows up faster than on a furnace that sits idle half the year, so prompt attention matters.
Defrost cycle failures
In Marietta’s damp winters, heat pump coils ice over regularly. A healthy system automatically runs a defrost cycle to clear the frost. When that cycle fails, the outdoor unit turns into a block of ice and the system stops heating the house. Our technicians check the defrost sensor, the control board, and the reversing valve to pinpoint which part of the sequence broke, then replace only what’s actually failed.
Refrigerant leak detection
A heat pump that runs constantly but never quite warms the house often has a slow refrigerant leak. We trace the leak with electronic detectors and repair it properly rather than just topping off the charge and hoping it holds through spring. Adding refrigerant without fixing the leak is a stopgap, not a repair, and we’d rather do the job once.
Heating Repair
Heating Repair is the broad category that covers any failure in a home’s heating system, whether it’s a gas furnace, an electric air handler, or a heat pump acting as the primary heat source. When a Marietta home loses heat, the cause could be electrical, mechanical, or fuel-related, and the wrong guess wastes time and money. We diagnose the actual fault, explain it in plain English, and quote a written price before starting. Most heating repairs in this area run $150 – $700 depending on the part and the labor involved. The goal is always the same: heat back on the same day we arrive, with a guarantee in writing.
Electrical diagnostics
Loose connections, failed capacitors, and worn contactors interrupt far more heating systems than homeowners ever suspect. A furnace that hums but won’t start often has an electrical fault, not a fuel problem. Our technicians test the full circuit path, from the thermostat wiring to the blower motor windings, before recommending any repair. That approach catches the root cause instead of treating a symptom.
Airflow corrections
Sometimes a heating system isn’t broken at all; it’s strangled. Closed vents, dirty evaporator coils, or an undersized return duct can make a furnace overheat and shut down on safety limits. We measure static pressure and check the duct layout where it’s accessible, because a heating system that can’t breathe will never heat evenly, no matter how many parts get replaced.
Boiler Repair
Boiler Repair addresses hydronic heating systems that circulate hot water or steam through radiators and baseboards, and while boilers are less common in Marietta new construction, plenty of older homes in Acworth, Kennesaw Furnace Repair, and the historic districts around the Square still rely on them. When a boiler fails, homeowners lose both heat and often hot water, which makes it a two-front problem. We service boilers with the same upfront pricing and written guarantee as every other job, and most boiler repairs fall within the $150 – $700 range. Boilers are pressure vessels, and the safety controls that protect them are not optional; if a relief valve or pressure switch is failing, that repair cannot wait.
Pressure and expansion issues
A boiler that loses pressure will shut down or leave the upstairs radiators cold. The cause is usually a failing expansion tank, a slow leak in the piping, or air trapped in the system. We check the compression tank, the fill valve, and the relief valve, then repair or replace only what’s actually the problem. Correct water pressure also protects the system from the stress that leads to cracked sections.
Circulator pump failures
If the boiler fires but the radiators stay cold, the circulator pump is often the culprit. These pumps push heated water through the loop, and when the motor or impeller wears out, heat stops moving. We replace failed circulators and check the zone valves at the same time, because a stuck valve can mimic a bad pump and vice versa.
Gas Furnace Repair
Gas Furnace Repair focuses on the most common heating system in Marietta: the forced-air gas furnace. These units heat the majority of homes in Cobb County, and they fail in predictable ways: igniters burn out, flame sensors get coated with carbon, gas valves stick, and limit switches trip. Most gas furnace repairs run $150 – $700, with igniter replacements on the lower end and gas valve or inducer motor replacements on the higher end. Every repair is covered by our 365-Day Done Right Promise, written down before we leave. Gas furnaces involve combustible fuel and open flame, so any repair that touches the gas train or the heat exchanger should always be handled by a trained professional, not as a weekend DIY project.
Igniter and flame sensor replacement
When a gas furnace tries to start but shuts off after a few seconds, the flame sensor is usually the problem. When it won’t light at all, the igniter has likely failed. Both are common, both are quick to diagnose, and both are repairs we perform dozens of times each winter across Marietta. We stock igniters and sensors for Trane, Lennox, and Goodman units on the truck, so the fix often happens in one visit.
Gas valve and manifold checks
A furnace that lights unevenly, makes a banging noise at startup, or produces a lazy orange flame needs its gas valve and manifold pressure checked. Incorrect gas pressure wastes fuel and stresses the heat exchanger. We verify the incoming pressure and the manifold setting with a manometer, then adjust or replace the valve as needed so the burners fire cleanly.
Furnace Tune Up
A Furnace Tune Up is the annual service that prepares a heating system for the winter ahead, and in Marietta it typically runs $80 – $200. We recommend scheduling a tune up in October or early November, before nighttime temperatures drop low enough that the furnace runs for hours at a stretch. During a tune up we clean the burners, test the ignition sequence, check the carbon monoxide output, inspect the heat exchanger for cracks, and measure the system’s start-up amperage to catch a blower motor that’s working too hard. It’s a comprehensive check designed to find trouble before it finds you on a 28-degree night.
Carbon monoxide screening
A cracked heat exchanger can send carbon monoxide into a home, and that’s a risk no tune up should ignore. We test the furnace’s combustion readings and visually inspect the heat exchanger where accessible. If the readings are out of spec, we shut the system down and explain exactly what’s wrong and what it’ll take to correct it. This is not a scare tactic; it’s basic safety.
Efficiency verification
Over a season, dust buildup and worn components quietly raise a furnace’s fuel consumption. A tune up restores the system’s efficiency by cleaning what’s dirty and tightening what’s loose, which shows up as lower gas bills from December through February. For Marietta homeowners who keep their thermostat lower at night and the house comfortable all day, the tune up often pays for itself within one season.
Emergency Furnace Repair
Emergency Furnace Repair is what happens when a heating system fails at the worst possible time, and it’s why Coldharbour Heating & Air keeps a live person on the phone 24 hours a day, 7 days a week. We don’t route after-hours calls to voicemail or a call center. You call (762) 240-5599, describe the problem, and we get a technician rolling toward your Marietta home. Emergency repairs fall within the same $150 – $700 range, and there’s no overtime surcharge or after-hours premium, because the price is the price, written down before work starts. A furnace that dies during a cold snap is not an inconvenience; it’s a risk to your family and your pipes, and we treat it that way.
Same-day response
When the temperature outside drops below freezing, we prioritize no-heat calls and work to get a technician to your door the same day. Our service area covers Marietta, Kennesaw, Smyrna, our Furnace Repair in Powder Springs, and the surrounding communities, with response times that reflect how close we are, not how busy the call board is. You’ll get a firm window, not a vague “sometime this afternoon.”
Overnight and weekend coverage
Furnaces don’t fail on a convenient schedule, and neither do our technicians. We run calls through the night and on weekends year-round, with the same written guarantee on every job. If a repair can’t be completed immediately because a part needs to be ordered, we’ll explain the temporary options and get you back to safe temperatures as fast as the situation allows.
Brands We Service
Our technicians are trained to work on nine major residential HVAC brands, including Trane, Lennox, Goodman, and Rheem. We service Trane units from the high-efficiency XV series down to the older XR models still heating homes across East Cobb, and we keep common Trane igniters and flame sensors on the truck so a repair doesn’t have to wait on a parts run.
Lennox furnaces, particularly the G series models popular in Marietta’s larger homes, have their own control board quirks and diagnostic codes. We know those systems well enough to read the led light sequence and get straight to the fault without guessing. Goodman and Rheem units are common in newer subdivisions and rentals throughout Cobb County, and we stock OEM parts for both brands. Whatever make sits in your utility closet, we can diagnose it, quote it, and fix it.
See the difference
Before
After
Before
After
Before
AfterSigns You Need a Pro Right Now
- Short cycling. The furnace starts, runs for a few minutes, shuts off, and repeats. It’s often a dirty flame sensor or an overheating limit switch, but continued short cycling strains every component and can crack a heat exchanger. A technician should check it before a $150 repair becomes a $3,500 replacement.
- A yellow or orange flame. A healthy gas furnace burns blue. Yellow or orange flame means incomplete combustion, which can produce carbon monoxide. This is a same-day call, not a wait-and-see situation.
- Sulfur or burning smells. A gas or burning odor from the vents usually means the heat exchanger is overheating or the motor is failing. Dust burning off at the start of the season is normal for a few minutes; a smell that lingers is not.
- Rattling, banging, or screeching. New noises mean something is loose, failing, or out of balance. A screech at startup is often a blower motor bearing; a bang from the burner area can be delayed ignition, which damages the heat exchanger every time it happens.
- Cold air blowing. If the system runs but the air coming from the vents is cool, the burners may not be lighting, the gas valve may be stuck, or a reversing valve on a heat pump may have failed. Cold air is the system telling you it can’t do its job.
Our Process, Step by Step
- 1
You call and talk to a person. A live voice answers at (762) 240-5599, day or night. We take your address, ask what the system is doing, and give you a firm arrival window. No phone tree, no waiting until Monday.
- 2
The technician arrives in the window. A background-checked, uniformed tech shows up in a marked vehicle at the time we promised. You’ll know who’s at your door before you open it, and they’ll be ready to work on whatever system you have.
- 3
Diagnosis and written price. The tech tests the system, finds the fault, and explains it in plain English, trade term first, then a translation. Before any tool touches the furnace, you get a written price. That price does not change at the door, no matter what else gets uncovered.
- 4
The repair and a written guarantee. The work gets done, the system gets tested through a full heating cycle, and the area gets cleaned up. Before the tech leaves, you receive a written guarantee that covers the repair for 365 days. If it fails, we come back and make it right at no charge.
- 5
Follow-up if anything goes wrong. If the same repair fails within a year, call us. We come back, diagnose it again, and correct the work free of charge. The guarantee is on paper, not verbal, and it doesn’t expire just because the season changed.
How Much Does Furnace Repair Cost in Marietta?
Furnace repair in Marietta typically runs between $150 and $700, depending on what failed and how involved the labor is. A failed igniter usually lands near the bottom of that range. A bad inducer motor or gas valve lands near the top. A full blower motor replacement with labor can exceed $700 when the motor is a variable-speed model, but we’ll always quote the exact number before work starts, so there are no surprises.
| Common Repair | Typical Cost in Marietta |
|---|---|
| Flame sensor cleaning or replacement | $150 – $250 |
| Igniter replacement | $150 – $280 |
| Pressure switch replacement | $180 – $320 |
| Inducer motor replacement | $400 – $700 |
| Gas valve replacement | $350 – $650 |
| Blower motor replacement | $400 – $700+ |
Several factors move the price within that range. System age matters, because parts for a 25-year-old furnace often cost more and take longer to source than parts for a current model. Brand matters too; OEM parts for premium Trane or Lennox systems cost more than generic substitutes, though we don’t cut corners with cheap parts that fail inside a season. Accessibility also plays a role, because a furnace squeezed into a tight attic in a Vinings townhome takes longer to work on than one standing in a full basement in Acworth. The best way to avoid overpaying is to get a written quote before work begins and to ask whether the quoted part is OEM or aftermarket. Our free estimate includes the diagnostic, the recommendation, and the exact price, in writing, before you commit to anything.
Our Service Area Near Marietta
Coldharbour Heating & Air works throughout Marietta and the surrounding Cobb County communities, including Smyrna, Kennesaw, Vinings, Mableton, Acworth, and into the nearby areas of Roswell and Woodstock. Typical response times run fastest for homes near the Marietta Square and along the Whitlock Avenue corridor, with slightly longer trips to the northern and western edges of the service area. If your furnace has quit and you need it running again, we’ll give you an honest arrival window when you call. For homeowners in neighboring communities, we also offer Furnace Repair in Roswell and Furnace Repair in Woodstock, with the same pricing and written guarantees.
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.
Frequently Asked Questions About Furnace Repair in Marietta
Furnace repair is the diagnosis and correction of any fault that prevents a heating system from producing or circulating warm air. It covers everything from replacing a failed igniter to correcting a gas valve that’s delivering the wrong pressure. In Marietta, most repairs involve gas furnaces and heat pumps, and the work is done by a trained technician who can safely handle electrical and gas components.
Most repairs take between one and three hours from arrival to a running system. Simple jobs like a flame sensor replacement are often done in under an hour. A gas valve or inducer motor replacement takes longer, and if a part has to be ordered, we’ll explain the timeline before any money changes hands.
Furnace repair in Marietta typically costs between $150 and $700, with the exact price depending on the part that failed and the labor involved. You’ll receive a written price before any work begins, and that price doesn’t change. Call (762) 240-5599 for a free estimate and an exact quote for your system.
Yes. Our technicians are trained to work on nine major residential brands, including Trane and Lennox, and we keep common OEM parts for both on the truck. We also service Goodman, Rheem, Carrier, Bryant, York, Daikin, and American Standard systems, so the brand of your furnace won’t slow down the repair.
Yes. We answer the phone with a live person 24 hours a day, 7 days a week, and we run emergency calls through the night and on weekends. There’s no after-hours surcharge on emergency repairs, and the same $150 – $700 pricing applies. A no-heat call in freezing weather is a priority, not an inconvenience.
Every repair comes with our 365-Day Done Right Promise. It’s a written guarantee, handed to you before the technician leaves, that covers the repair for a full year. If the same repair fails inside that window, we come back and make it right at no charge. No arguing, no prorated terms, just a promise on paper.
Clear a path to the furnace and make sure the area around the unit is accessible. If the system is in an attic or crawlspace, let us know when you call so the technician brings the right tools and lighting. You don’t need to have any parts on hand or know anything about the system; the diagnostic is part of the visit, and the written price covers everything.
Schedule Your Furnace Repair Service in Marietta Today
If your furnace is acting up or has stopped heating altogether, call Coldharbour Heating & Air at (762) 240-5599. A live person will answer, give you a firm arrival window, and set up a no-obligation estimate. The written price comes before any work, and every repair carries our 365-day guarantee. Heat is a necessity in a Marietta winter, and we’re ready to restore it tonight.
Written by Victor Mancini, Owner at Coldharbour Heating & Air, serving Marietta since 2003.