When a furnace quits during a Kennesaw cold snap, the house cools down quickly and safety becomes the first concern. Our technicians diagnose gas and electric furnaces methodically, check for anything that affects safe combustion, and explain exactly what failed before we quote a repair.
Winters here are mild on average but punctuated by hard freezes and the occasional ice storm — the kind of weather that finds a cracked igniter, a dirty flame sensor, or a failing inducer motor at the worst possible moment. We carry common ignition and control parts on the truck so most no-heat calls end with the heat back on the same visit.
Signs Your Kennesaw Furnace Needs Repair
Heating problems range from an easy fix to a safety issue. Call us if you notice:
- The furnace runs but blows cool or lukewarm air
- No heat at all — the blower or burners won't start
- Short cycling — it lights, runs briefly, then shuts off
- A burning, gas, or musty smell when the heat kicks on
- Loud booming, rattling, or scraping from the furnace
- The pilot or igniter won't stay lit
- A yellow burner flame instead of steady blue
- The furnace runs constantly but rooms stay cold
How Our Furnace Repair Visit Works
Safety first, then a clear diagnosis and a written price before any chargeable work.
- 1
Safety check on arrival
We confirm the appointment and diagnostic fee up front, then check for gas odors, combustion issues, and anything that would make it unsafe to run the system while we work.
- 2
Component diagnosis
We test the igniter or pilot, flame sensor, gas valve, inducer, limit switches, blower, and thermostat, and inspect the heat exchanger — pinpointing the fault instead of replacing parts on a guess.
- 3
Written options & your approval
We explain what failed, show you the evidence, and give written repair options. If we find a cracked heat exchanger or other safety concern, we tell you plainly and lay out your choices.
- 4
Repair, test & clean up
We complete the approved repair, verify safe ignition and a full heat cycle, confirm the furnace shuts off correctly, clean up, and document the work.
Why We Take Combustion Safety Seriously
A gas furnace burns fuel inside your home, so a proper repair isn't only about restoring heat — it's about confirming the system burns and vents safely. We inspect the heat exchanger and check for signs of incomplete combustion, because a hairline crack can let combustion gases reach the living space.
If we find a genuine safety concern, we'll show you and explain it in plain terms. We won't scare you into a replacement, and we won't leave a hazard running to make a sale.
Short Cycling and Airflow Problems
A furnace that lights and then shuts off after a minute is often reacting to a safety limit — frequently caused by restricted airflow from a clogged filter, blocked returns, or a failing blower. Left alone, that overheating shortens the furnace's life.
We trace short cycling to its real cause rather than resetting it and leaving. Sometimes the fix is as simple as airflow; sometimes it's a flame sensor or control issue. Either way, you'll know which.
What Furnace Repair Costs in Kennesaw
Published Atlanta-area research puts most furnace repairs in the $130–$650 range, depending on the part and the labor involved. That's regional context, not a quote — an igniter or flame sensor sits at the low end, while a control board or gas valve runs higher.
We tell you the diagnostic fee before we come out, show you the failed component, and give a written price before starting. If we find a safety issue like a cracked heat exchanger, we'll never pressure you — we'll explain the risk and your repair-or-replace options.
What affects your price:
- The failed part — igniter and sensor are cheap; control board and gas valve cost more
- Gas versus electric furnace and the fuel connections involved
- Whether a safety component like the heat exchanger is affected
- Accessibility (attic, crawl space, or tight utility closet)
- Emergency or after-hours timing during a freeze
Why Kennesaw homeowners choose HVAC Kennesaw GA for furnace repair
We’ve spent 15+ years on Cobb County’s systems, and it shows in how we handle a furnace repair call: we test first, explain the reading, and put the price in writing before we touch anything chargeable.
- 4.9★ from 214+ Kennesaw & Cobb County homeowners
- GA Licensed Conditioned-Air Contractor · EPA Section 608 Certified Technicians
- Written options and your approval before any chargeable work
- Same-day service across Kennesaw & Acworth — 24/7 during ice storms and heat waves.
4.9★ Rated
214+ local reviews
Licensed & Insured
GA conditioned-air · EPA 608
24/7 Emergency
Same-day across Kennesaw
15+ Years
Serving Cobb County
Furnace Repair across Kennesaw & Cobb County
We bring furnace repair to homes and businesses throughout Cobb County — from Acworth and Marietta to the East Cobb and West Cobb subdivisions, plus every Kennesaw neighborhood. We’re dispatched from 3600 Kennesaw N Ind Pky, so response times stay short across the area.