Kennesaw HVAC Repair & Replacement

Heating or cooling trouble in Kennesaw? Comfort Medics Heating & Cooling repairs and replaces furnaces, air conditioners and heat pumps for homeowners in Kennesaw and northwestern Cobb County. We’re a family-owned, licensed and insured Georgia contractor (GA. REG. CR2011437), our owner has 17 years in HVAC, and we head to Kennesaw from our home base in Kingston. Every replacement starts with a free estimate at your house.

Get a Free Estimate Call (470) 360-8887

HVAC Repair and Replacement in Kennesaw, GA

Kennesaw is a northwestern Cobb County suburb along the I-75 corridor, just southeast of Kennesaw Mountain National Battlefield Park. Homes here share metro Atlanta’s humid subtropical pattern: hot, humid summers that put most of the yearly load on the cooling side, and winters that are usually mild but still cold enough for furnaces and heat pumps to work hard on clear January mornings.

So before we talk about new equipment, we look at how the current system is actually running. Sometimes a repair or an airflow correction is the right answer. When replacement makes more sense, we price the options side by side.

What Do You Need Help With?

Repairs, Service and After-Hours Calls in Kennesaw

Not every problem needs a new system. We repair furnaces, air conditioners and heat pumps in Kennesaw, and we offer 24/7 emergency service for the night the heat quits or the weekend the AC stops. Before you call, a few things are worth a look:

• Check that the thermostat is set to the right mode and has working batteries, if it uses them.
• Look at the air filter. A clogged filter can choke airflow and, on an AC, contribute to a frozen coil.
• Check the breaker for the indoor and outdoor units. If it trips again after one reset, leave it off and call.
• If you see ice on the refrigerant lines or water around the indoor unit, turn the cooling off and call us.

Repair visits: our service fee is $125, and it’s credited toward the repair when you go ahead with the repair or a new system. Comfort Club members don’t pay service fees. Our standard is 24-hour turnaround: from your call to your system running again, for most repairs.

Replacing a System in Kennesaw: What We Check

A new system is only as good as the way it’s installed and set up. Our Kennesaw installs follow the Comfort Medics Installation Standard, performed as applicable to the equipment and project:

• Moisture and charge: on an AC or heat pump we braze with nitrogen flowing, pressure test, pull a deep vacuum, and verify the refrigerant charge with superheat and subcooling. The TXV is evaluated where the equipment supports it. In a humid climate, getting the charge and airflow right is what lets the system remove moisture as well as heat.
• Airflow: we evaluate the ductwork, measure static pressure and set the blower to suit the system.
• Gas furnaces: temperature rise, gas pressure, and flue sizing and venting.
• Electrical and drainage: supply voltage, amp draws, control-board settings, and condensate drainage before we leave.

For the full list and the reason behind each check, see our HVAC replacement and installation page. If you’re still deciding, our guide to repair or replace walks through the trade-offs.

Starting prices, as of November 2026: air conditioner replacement starts at $5,000, furnace replacement at $4,000, evaporator coil replacement at $2,000, a heat pump outdoor unit (air handler not included) at $2,000, and a complete system at $7,000. Your final price depends on your home’s size, ductwork, equipment efficiency and the options you choose, and we quote it after a free in-home estimate. Already have a replacement quote? A second opinion before you decide is free. See the full ranges in our HVAC replacement cost guide.

Permits: City of Kennesaw or Cobb County

We pull a permit on every replacement. Inside Kennesaw city limits, City of Kennesaw Building Services issues mechanical permits and runs inspections through its online portal; all permits are applied for online, and the city asks you to call (770) 429-4554 or email permits@kennesaw-ga.gov if you are unsure whether a property is inside city limits. Outside the city in unincorporated Cobb County, Cobb County Community Development’s Building Division handles permitting and inspections. You don’t need to sort out which office applies; we take care of the permit either way.

Warranty and Financing

A new system from Comfort Medics comes with a 10-year manufacturer parts warranty on qualifying equipment (registration may be required), a 10-year labor warranty from Comfort Medics and our lifetime craftsmanship guarantee. Optional third-party extended coverage, such as JB Warranties, is also available. If monthly payments work better, financing is available through FTL Finance and other lenders, for repairs and new systems (subject to credit approval); see our financing page.

Kennesaw and Nearby Areas We Serve

We serve homes in Kennesaw and the surrounding parts of Cobb County. From Kingston we also cover nearby Woodstock, Canton, Cartersville and Rome. See every town on our service areas page.

Kennesaw HVAC Questions

Does it matter whether I live inside Kennesaw city limits?

It matters for the permit office. Inside the city, Kennesaw Building Services issues the mechanical permit. Outside the city in unincorporated Cobb, the county Building Division does. If you are not sure which applies, the city asks residents to call (770) 429-4554; we confirm it for you on every replacement.

My AC runs all afternoon and the house still feels sticky. Do I need a new unit?

Not necessarily. Low airflow, a dirty coil, an incorrect refrigerant charge or a system that’s oversized for the house can all leave humidity behind. We check how the system is running before recommending anything.

Is a heat pump a good fit for a Kennesaw home?

It can be. Heat pumps handle both heating and cooling on electricity, usually with backup heat for the coldest mornings. Whether it fits depends on your current equipment, ductwork and electrical service, which we look at during the free estimate.

Can you come out at night or on a weekend?

Yes. We offer 24/7 emergency service. Call (470) 360-8887.

Schedule a Free Kennesaw Estimate

Send us a few details below and we’ll contact you to set a time, or call (470) 360-8887. We’re always on call for your comfort.

Nearby service areas: Woodstock HVAC · Canton HVAC · Cartersville HVAC · Rome HVAC · All Service Areas · HVAC Replacement & Installation · Free Quote