AC repair
Furnace & heating
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 estimateYork Ductwork Repair: The Marietta Owner’s Guide
York ductwork repair in Marietta typically runs $275 – $550 for most leak sealing and section replacement jobs, and we can usually have a technician out same-day when you call before noon. Ductwork is the delivery system for every dollar your York system spends heating or cooling air, and when it fails, you feel it fast: rooms that never reach temperature, dust on every surface, and a utility bill that climbs while comfort drops. Most homeowners discover the problem as a hot or cold bedroom that no thermostat adjustment will fix.
We’re Cold Harbour Heating and Air Marietta, and we work on York duct systems every week across Cobb County. We’re an independent service provider, not affiliated with York, which means we can repair what’s there with parts that fit correctly and work that’s guaranteed in writing. That independence also means we don’t have to sell you a whole new system to fix a leaking plenum. We just fix the ductwork.
Which York Models This Applies To
Ductwork repair applies to every York model line that pushes air through a home, which is essentially all of them. The gotcha most Marietta homeowners run into isn’t the York model number on the condenser. It’s the ductwork itself, which was almost always installed locally and varies house by house.
What matters for compatibility is less the York model and more the duct dimensions and material. York systems in Marietta homes commonly pair with 6-inch, 8-inch, and 10-inch round flexible duct, or rectangular sheet-metal trunk lines ranging from 8×12 to 12×20 inches. We identify what you have by checking the printed labels on flex duct (which list R-value and diameter) or measuring the metal duct cross-section. For older Marietta homes in neighborhoods like East Cobb and Whitlock, we regularly replace original 1970s-era rigid ductboard that has crumbled at the seams. OEM York duct components are generally not a factor here because York’s warranties cover equipment, not the attached duct system. A quality UL-listed aftermarket flex duct from names like Dundas Jafine or Master Flow performs equivalently for a lower installed cost, and we stock the common sizes on the truck. Ductboard replacement in damp Georgia crawlspaces is a different animal, so if your foundation vents run open all summer, plan on inspecting that before it becomes a bigger repair.
Styles & brands we work with







Signs Your York Ductwork Repair Is Failing
- One room never reaches temperature. A disconnected or collapsed run is starving that room of airflow. The duct has usually separated at a joint or a flex run has been crushed by something in the attic. Air is blowing into a crawlspace or attic, not the bedroom.
- Dust coats everything within days of cleaning. A return-side leak pulls attic or crawlspace dust and insulation directly into the York air handler and through your supply registers. It’s not your housekeeping; it’s unfiltered air bypassing the system.
- Energy bills step up without a change in weather. Leaking ductwork in a Georgia attic means you’re air-conditioning a 140-degree attic space instead of the living room. We’ve seen Marietta homes lose one fifth of their conditioned air before it ever reaches a supply register.
- Whistling or fluttering noise at a vent. A separated inner liner inside flex duct creates a restriction that causes air turbulence. The noise is the duct telling you it has collapsed internally from age and heat cycles, and no amount of register adjustment will fix it.
- Musty smell when the AC runs, worse in humid weeks. Sweat on uninsulated or poorly sealed metal ductwork feeds mold and mildew, especially in Marietta’s July humidity. The fix is sealing and insulating, not a scented filter.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
Installed ductwork repair in Marietta runs from $275 for a single disconnected flex run reseal to $550 for a longer section replacement with new insulation and hangers. A full branch-duct replacement with several runs in a larger home steps up from there, but we scope that case by case and hand you a written price before any work starts.
Every price includes the part, the labor to remove and properly reattach it, mastic sealing at every joint, and hangers re-spaced to code. We write the final number down before the first tool comes out, and it does not change at the door. That’s how we operate as part of the Kingswell network, and we’ve done it that way since 2003. Your repair is also covered by our 365-Day Done Right Promise: if the fix fails within a full year, we come back and correct it at no charge.
DIY or Call Us?
Ductwork repair sits in a gray zone, but the honest split is this: you can safely inspect and identify the issue, and in most cases you should not attempt the repair itself. Checking registers for airflow, visually inspecting exposed flex duct in an unfinished basement, and replacing a filter are all fair game. What goes wrong with DIY repairs is the attic. Marietta attics run hot enough to cause heat exhaustion in the summer, ceiling joists hide the water heater vent, and a wrong step puts you through the drywall. Flex duct that looks simple to reconnect usually has a torn inner liner or a crushed section further down the run that needs a proper air test to find. If you’ve already looked and you’re not sure what you’re seeing, call (762) 240-5599 and describe it. Victor Mancini usually tells customers: “Tell me what the system is doing, and I will tell you exactly what it needs – no guesswork, no runaround.”
FAQs
Flex duct in a Marietta attic typically lasts 15 to 20 years before the inner liner separates or the outer jacket tears. Metal trunk lines last longer, 30 to 50 years, though their seals and insulation typically need attention every 10 to 15 years. Georgia’s attic heat and humidity accelerate flex duct failure compared to cooler climates. Call (762) 240-5599 if your ducts are in that age range and you’re seeing uneven airflow.
Yes, and in most Marietta homes we do exactly that. A single separated joint or small tear is a straightforward seal or short section splice, usually in the $275 – $350 range. We only recommend section replacement when the inner liner has collapsed or the insulation is mold-damaged. We’ll show you the failed section before we quote it.
Most single-run repairs take one to two hours once the technician reaches the duct location. A multi-section replacement in a large attic can run a half day. We give you a firm arrival window and the work is completed in that visit, with a clean job site left behind.
Yes, our trucks carry 6-inch, 8-inch, and 10-inch flex duct, mastic, foil tape, hangers, and sheet metal for trunk-line patches. That means we can fix most ductwork issues on the first trip, same day, without a follow-up parts order. If your duct situation is unusual, we’ll know within the first half hour.
Written by Victor Mancini, Owner, Cold Harbour Heating and Air Marietta at Cold Harbour Heating and Air Marietta, serving Marietta and nearby areas.