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AfterFurnace Repair in Marietta, GA
Furnace repair in Marietta typically costs between $150 and $650 depending on the part that failed, and most repairs are completed the same day we visit. A broken furnace in a Marietta winter is not something to wait on. Cold Harbour Heating and Air Marietta has repaired furnaces across Cobb County since 2003, and we answer the phone with a live person 24 hours a day. Call us at (762) 240-5599 and you will get a written price before any work begins.
This page covers what furnace repair actually looks like in Marietta homes, from the first cold night it won’t kick on to the moment heat comes back. It is part of our broader Heating & Furnace in Marietta work, which includes everything from seasonal maintenance to full system replacement. If you are standing in a cold house right now, skip to the pricing section, call us, and we will get a technician moving.
We know what you are up against. Marietta’s winters run damp and cold, with temperatures dropping into the 20s enough times each year that a furnace failure stops being an annoyance and starts being a household emergency. The older neighborhoods around Marietta Square have furnaces that have seen two decades of service, and the newer builds off Barrett Parkway have condensing units that need a different kind of attention. Either way, the tech we send has been trained on the major brands you are most likely to have in the closet or crawlspace, including Trane, Lennox, and Goodman.
Our name comes from the cold harbours of old, roadside shelters where travelers waited out bad weather. A furnace that works is that shelter, and our job is to make sure it stands up. Victor Mancini, who owns Cold Harbour Heating and Air Marietta, runs every job to the written standards of the Kingswell network. That means the price is on paper before tools come out, the technician shows up in the window given, and the repair is guaranteed in writing for 365 days.
When You Need Furnace Repair
Some furnace problems announce themselves. Others show up as a slow decline you only notice on the third cold night. Here are the signs that tell a homeowner in Marietta it is time to call:
- The furnace runs but blows cold air. This often points to a failed igniter or a flame sensor that has gone dirty. Both are common in Marietta homes because our humid air accelerates corrosion on gas components.
- It short cycles. The burners fire up, the blower runs for two or three minutes, and then everything shuts down. Short cycling is usually a limit switch or a clogged filter, and ignoring it can crack a heat exchanger.
- You hear a loud bang when it starts. Delayed ignition, where gas builds up before lighting, is both loud and dangerous. A tech should look at it the same day.
- The smell of gas near the furnace. If you smell gas, leave the house and call the gas utility emergency line first. Once the immediate risk is handled, our technicians can find the leak and repair it before you restart the system.
- Your energy bill jumped for no obvious reason. A furnace working harder than it should is often a furnace with failing components, an undersized blower motor, or duct leaks that are stealing heat before it reaches the rooms.
- The thermostat says it is on, but the house won’t reach the set temperature. In older Marietta homes, this often comes down to a blower motor that is failing or a burner that is not firing at full capacity.
None of these are problems you should try to fix yourself. Furnace work involves live gas lines, electrical wiring, and internal temperatures high enough to cause real injury. Every Cold Harbour technician is background-checked, uniformed, and trained to diagnose the system as a whole rather than swap the first suspect part.
Our Furnace Repair Process
When you call (762) 240-5599, a live person picks up. Not a phone tree, not a callback service. That person gets your address, hears what is happening with your system, and gives you an arrival window. Then this is what happens:
- You get a firm arrival window. We tell you when the technician will be there, and we arrive in that window. No all-day waiting, no no-shows.
- The technician inspects the whole system. The furnace cabinet, blower motor, heat exchanger, flame sensor, igniter, gas valve, and control board all get checked. On a Trane, Goodman, or Lennox system, we work from the manufacturer’s service specs rather than guessing.
- You get a written price before work begins. The price covers the part, the labor, and any materials needed. It does not change at the door. You approve it before a single tool comes out of the bag.
- The repair is completed and tested. The technician runs the furnace through a full heating cycle, checks the temperature rise across the system, and confirms the burners are lighting correctly.
- You receive a written 365-day guarantee. Every repair comes with our 365-Day Done Right Promise on paper. If the same repair fails within a year, we come back and correct it at no charge. No argument, no fine print trick.
- The work area is cleaned before we leave. We put down drop cloths, and we sweep or vacuum the space around the furnace before the job is closed. The Kingswell Way says leave the place cleaner than you found it, and that is how our techs operate.
Furnace Repair Pricing in Marietta
Most furnace repairs in Marietta fall between $150 and $650, parts and labor included. That range is honest, and it covers the vast majority of repairs we make in Cobb County each winter. Here is what common repairs cost in this market before any tax or diagnostic considerations:
| Repair | Typical Cost (Parts & Labor) |
|---|---|
| Flame sensor cleaning or replacement | $120 – $220 |
| Igniter replacement (hot surface igniter) | $180 – $320 |
| Blower motor capacitor | $150 – $280 |
| Limit switch replacement | $160 – $290 |
| Gas valve replacement | $350 – $650 |
| Blower motor replacement | $450 – $800 |
| Heat exchanger replacement | $900 – $2,400 (often replaced with system) |
Several things move the final number. The brand matters: a Lennox gas valve costs more than a Goodman equivalent because of parts pricing, not because the labor is different. The age of the system matters too; a 25-year-old furnace may have discontinued parts that take longer to source. And access matters: furnaces squeezed into Marietta crawlspaces or attic kneewalls take more labor than a unit standing in an open basement.
We give you the written price before any work starts. You will know the number, it will be on paper, and it will not change at the door. If the repair is not worth making because the furnace is too old or the heat exchanger is compromised, we tell you that straight and walk you through replacement options instead.
Every diagnostic visit includes an assessment of whether repair or replacement makes more financial sense for your specific system. You will never get a hard sell from us. Call (762) 240-5599 and ask for a free estimate on furnace repair.
Why Marietta Homeowners Call Cold Harbour
Marietta has no shortage of HVAC companies. What separates us is that we put the promises in writing before the truck even parks. The Kingswell Way, the operating standard of our network, is built on five values: say the price before the work, show up in the window given, leave the place cleaner than found, put the guarantee in writing, and come back if it fails.
Our technicians are trained to service nine major residential HVAC brands, which means the tech arriving at your home can work on whatever is already installed. Rheem, Trane, Goodman, Lennox, Bryant, Carrier, York, Daikin, and American Standard are all in our training rotation. You do not need to own a specific brand to call us. The furnace you have is the furnace we fix.
Victor Mancini has owned Cold Harbour Heating and Air Marietta since the early years of the company, and the business has operated under the Kingswell network standard since 2003. That is more than twenty years of Marietta homes, Marietta winters, and Marietta furnaces. We know which neighborhoods run older gas valves and which newer subdivisions have high-efficiency condensers that need specialized attention.
The 365-Day Done Right Promise is the guarantee that matters most to our customers. If a repair fails within 365 days, we return and correct the work at no charge. That guarantee is written down and handed to you before the technician leaves the first time. We do not ask you to trust a handshake.
FAQs – Furnace Repair
How much does furnace repair cost in Marietta?
Most furnace repairs in Marietta cost between $150 and $650, parts and labor included. The exact price depends on which part failed and how difficult it is to reach the furnace in your home. Call (762) 240-5599 for a free estimate with a written price before the work begins.
Can you repair my furnace the same day?
Yes, in most cases. We keep our technicians scheduled with buffer time for emergency calls, and we answer the phone with a live person 24 hours a day, 7 days a week. When a furnace fails on a cold Marietta night, we work to get a technician to you the same day.
Is it cheaper to repair or replace my furnace?
If the repair costs less than a third of a replacement system and the furnace is under 15 years old, repairing is usually the smarter financial move. If the heat exchanger is cracked or the system is past 20 years old, replacement usually makes more sense. We give you both options with honest numbers and no pressure either way.
Does your repair come with a guarantee?
Yes. Every repair we make is covered by the 365-Day Done Right Promise, which is a written guarantee handed to you before our technician leaves. If the same repair fails within 365 days, we come back and fix it at no charge.
Written by Victor Mancini, Owner at Cold Harbour Heating and Air Marietta, serving Marietta.