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 North Decatur
When your furnace quits on a cold North Decatur night, you need a straight answer on cost and a real person who picks up the phone. If you also need North Decatur AC Repair, we handle that too. Most furnace repairs in North Decatur run $150 – $700, depending on what failed. We answer calls 24/7, give you a written price before any work begins, and can usually have a background-checked technician at your door the same day you call. That’s the standard we’ve held since 2003, and it applies to every ranch off North Druid Hills Road, every split-level near Medlock Park, and every slab-built home south of the Clairmont corridor. Call (762) 240-5599 and you’ll talk to a live person, not a voicemail tree.
Why Cold Harbour Heating and Air Marietta Is North Decatur’s Preferred Furnace Repair Company
North Decatur’s housing stock has a personality all its own, and we’ve spent years learning it. The ranches, split-levels, and slab foundations built between the 1950s and 1980s don’t fail the way newer construction does. You’ll find our Furnace Repair team working off Emory’s campus, through the neighborhoods around North Dekalb Mall, and out toward the Clairmont Heights side of town, where ductwork in crawlspaces and undersized returns create very specific problems. We know those problems because we’ve fixed them in hundreds of homes across North Decatur, not because we read about them in a training manual.
Victor Mancini set the tone for how we run every job: say the price before the work, show up when we said we would, leave the house cleaner than we found it, and put the guarantee in writing. Our 365-Day Done Right Promise means if a repair fails within a full year, we come back and correct it at no charge. That guarantee is handed to you on paper before we leave, not buried in fine print. When a North Decatur homeowner calls us about a furnace that won’t light or a blower that’s seized, they’re not hoping we’ll do the right thing. They have it in writing.
Styles & brands we work with
Gas Furnace Repair in North Decatur
Gas furnace repair in North Decatur carries a range of $150 – $700, and what you pay depends on which part failed and how accessible your system is. In the older homes that dominate this area, gas furnaces are often original equipment from the 1960s and 70s, or they’re aftermarket replacements squeezed into closets and crawlspaces never designed for modern airflow. When we repair a gas furnace here, we’re not just swapping a part. We’re checking gas valve pressure, verifying the heat exchanger hasn’t cracked from years of short cycling, and making sure the venting is safe. That last point matters in older North Decatur homes where flue pipes may run through spaces that were remodeled years ago.
Gas furnaces in North Decatur fail for reasons you don’t see in McMansions. The original ductwork from the 1950s – 70s was often sized for lower humidity loads, so when a furnace is repaired without checking static pressure, the blower motor can overwork and fail within a season, a problem less common in newer Decatur subdivisions. That’s why every gas furnace repair we do here includes a static pressure reading. It’s not a line item. It’s part of doing the job correctly.
Heat Exchanger & Ignitor Work
A cracked heat exchanger is the most serious failure a gas furnace can have, because it can leak carbon monoxide into the home. Ignitor replacement is one of the most common repairs we handle in North Decatur, typically falling in the $150 – $280 range. If your furnace clicks but won’t light, the ignitor is usually the first thing we test.
Gas Valve & Blower Motor Repair
Gas valve failures often show up as a furnace that lights, then shuts off within a minute or two. Blower motor failures in North Decatur tend to follow high static pressure from undersized ductwork, especially in split-levels and ranches built before modern airflow standards. We check both when a furnace is behaving erratically, because one failure often reveals the other waiting to happen.
Furnace Tune Up in North Decatur
A furnace tune up in North Decatur runs $80 – $200, and it’s the cheapest insurance you can buy against both a January failure and a cracked heat exchanger you’d rather catch before it catches you. We inspect the burners, test the gas pressure, check the heat exchanger for cracks, clean the flame sensor, and measure static pressure across the system. In older North Decatur homes, static pressure is often the hidden problem: ductwork sized for a 1968 furnace is now being asked to push air through a modern system, and the blower works harder than it should every minute it runs.
A tune-up before the heating season catches those problems in the fall, when a $200 visit prevents a $700 February repair. Our technicians are not paid on what they sell, so when they write the report on what they found, you’re reading what they actually saw, not a sales pitch dressed up as a checkup. Every tune-up includes a written summary of the condition of your system, and if we recommend a repair, you get the same written price before any work begins.
What We Check Under the Pine Canopy
North Decatur’s pine-heavy tree canopy means pollen and pine straw get into places other homeowners never think about. We clean the flame sensor and burners, but we also check the air intake and condensate lines for the fine yellow dust that pines drop every spring. On a furnace, a dirty flame sensor is the most common cause of a system that lights and immediately shuts down.
Trusted Brands We Service in North Decatur
Our technicians are factory-trained on nine major residential brands, including Trane, Lennox, Goodman, and Rheem, so whatever system sits in your North Decatur home, the person who shows up has worked on it before. You won’t hear “we don’t really service those” when you call. We carry common parts for all those brands on our service vehicles, which means most repairs are completed in a single visit rather than waiting on a part to ship. If your furnace is a 1972 Rheem that’s been patched together for decades, or a Trane installed last year that’s now acting up, we can diagnose it and fix it without pointing fingers at the original installer.
Common Furnace Repair Problems We See in North Decatur Homes
- Undersized ductwork causing short cycling: The original ductwork in many 1950s-70s ranches and split-levels was sized for heating systems that moved less air than modern systems. When static pressure runs too high, the furnace overheats, trips the limit switch, and short cycles. Over a season or two, that stress cracks heat exchangers and burns out blower motors faster than anything else we see in North Decatur.
- Pine pollen and straw tripping the limit switch: The tree canopy that makes North Decatur neighborhoods like Clairmont Heights and Medlock Park so pleasant in summer drops a fine yellow dust every spring that clogs airflow sensors and condenser coils. When the furnace can’t pull enough air through a dirty filter and a fouled sensor, it trips the limit switch and shuts down.
- Slab-foundation ranches losing heat through crawlspace ducts: Homes built on slab foundations often run ductwork through unconditioned crawlspaces or in the slab itself. Those ducts leak heat all winter, which makes the furnace run longer, which accelerates wear on every component. We’ve measured 30% duct leakage in some North Decatur ranches, which means you’re paying to heat the crawlspace as much as the living room.
- Heat exchanger cracks in older gas furnaces: When a furnace short cycles for years, the metal in the heat exchanger expands and contracts more than it was designed to. Cracks form. In a North Decatur winter, when the furnace runs hard through cold snaps, those cracks widen and can leak carbon monoxide. If you have an older gas furnace that’s been short cycling, this is one to address before it becomes dangerous. A trained technician can test for cracks safely; this is not a do-it-yourself inspection.
See the difference
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AfterPricing for Furnace Repair in North Decatur, GA
Furnace repair in North Decatur runs $150 – $700 for most jobs, with ignitor replacements on the lower end and blower motor or gas valve replacements on the higher end. Here’s the breakdown in real numbers, so you know what to expect before you call:
| Service | Typical Price Range |
|---|---|
| Furnace Repair | $150 – $700 |
| Furnace Tune-Up | $80 – $200 |
What moves a repair toward the higher end of that range is parts cost and accessibility. A furnace in a tight closet off a carport means more labor than one in a full basement. A 1970s unit that needs a heat exchanger replaced costs more than a modern unit that needs a flame sensor cleaned. The written price you get before work begins accounts for all of that. Estimates are free, and the price does not change at the door. Call (762) 240-5599 for an exact quote.
We rolled out to a split-level off North Druid Hills Road where the furnace’s blower motor had seized after a heat exchanger crack went unnoticed. Our tech found the 1968 ductwork was undersized for modern airflow, replaced the motor with a variable-speed ECM unit, and reset the gas valve pressure to match the original Carrier furnace, restoring even heat without tearing out walls. That’s the kind of repair North Decatur homes need, a fix that respects the house instead of fighting it.
We Also Serve Cities Near North Decatur
Our service area covers North Decatur and the surrounding communities, including Marietta, Roswell, Woodstock, and Dallas. If you’re a few miles outside North Decatur and need Furnace Repair, chances are we’re already in your area on another call, so response time stays tight and the same written guarantee applies everywhere we work. Dispatch and scheduling are coordinated from our Atlanta office, and crews serve North Decatur locally.
Serving North Decatur, GA - Our Local Coverage Area
We’re based in the North Decatur 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 North Decatur
Your furnace short cycles because the ductwork in your older North Decatur home is likely undersized for the airflow your modern furnace needs. When static pressure runs too high, the system overheats and shuts itself down on the limit switch, then restarts a few minutes later. Tucker has a lot of newer construction with ductwork sized to current airflow standards; North Decatur’s 1950s-70s housing stock often doesn’t. The fix is usually a static pressure test followed by duct modifications or a blower speed adjustment, which we handle as part of any furnace repair. Call (762) 240-5599 for a diagnosis.
It might be, but it’s more likely your ducts are leaking heat into the crawlspace before the air ever reaches the floor registers. Slab-foundation ranches in North Decatur often lose 20-30% of heated air through unsealed duct joints in unconditioned spaces. The furnace itself may be running fine; the warm air just isn’t getting where it’s supposed to go. A cracked heat exchanger is a serious possibility too, though, and one that should be checked by a trained professional who can test safely. Either way, this is a diagnosis call, not a guess. Estimates are free at (762) 240-5599.
Yes, we size and install propane furnaces in North Decatur, and we’ve done many of them for homes where natural gas never came through. Sizing matters more than most people realize, especially in North Decatur’s older homes where existing ductwork may not match a modern furnace’s needs. We run a load calculation that accounts for the actual square footage, the exposed lot, and the original ductwork before recommending a unit. The written price for a propane furnace installation covers the equipment, labor, and any duct modifications needed for safe operation. Call (762) 240-5599 for a free estimate.
In North Decatur’s older split-levels and ranches, blower motors fail most often because they’ve been working against undersized ductwork for years. The motor draws more amperage than it was designed to handle, runs hot, and eventually seizes, usually during the coldest stretch of winter when the furnace runs longest. The original 1960s ductwork was sized for a time when furnaces moved less air, and nobody adjusted it when a newer, more powerful furnace was installed. Replacing the motor fixes the immediate problem, but correcting the static pressure is what prevents the next failure. That’s why we check airflow on every motor replacement, and why the repair is covered by our 365-Day Done Right Promise.
Once a year is enough for most North Decatur homes, but if your lot is heavily wooded, twice a year is worth considering, once before heating season and once in late spring after the pine pollen has dropped. The pine canopy means your furnace’s flame sensor and burners collect more debris than they would in an open-lot subdivision a few miles away, and that debris causes ignition failures and limit switch trips. A $80 – $200 tune-up is considerably cheaper than an emergency call on a cold night. Call (762) 240-5599 to schedule, and we’ll give you a firm arrival window when you book.
Contact Cold Harbour Heating and Air Marietta for Furnace Repair in North Decatur, GA
If your furnace is acting up, making noise, or won’t start at all, we’ll answer the phone, give you a straight answer on cost, and schedule a technician for a time that works. Every repair in North Decatur comes with a written price before the work begins and a written 365-Day Done Right Promise when the job is complete. You’ll know exactly who’s walking through your door, exactly what they’re going to do, and exactly what it costs. Call (762) 240-5599 for a free estimate. If the repair fails within a year, we come back and correct it at no charge. That’s the guarantee, in writing, every time.
Written by Victor Mancini, Owner at Cold Harbour Heating and Air Marietta, serving North Decatur since 2003.