Kennesaw HVAC Company handles the full range of heating and cooling work for homes, rental properties, and commercial buildings across Kennesaw and Cobb County. Whether the furnace stopped working on a cold January night, the AC is blowing warm air in July, or a property manager needs a system replaced between tenants, we handle it. Repair, installation, replacement, maintenance, and emergency calls are all on the table. No pressure and no gimmicks, just straight HVAC answers from people who know the work. Call for a quote and we'll get the job scoped before anything is scheduled.
From aging systems to brand-new installs, the symptom range we see runs the full length of the calendar. No heat in the house. AC not keeping up. A heat pump that runs but won't cool. A furnace cycling on and off without reaching temperature. A commercial unit that goes down mid-week and takes the whole floor with it.
Every repair visit starts with a diagnosis. The person who comes out identifies the cause before quoting the repair. That means checking refrigerant charge, testing electrical components, inspecting the heat exchanger, and reading the system's behavior rather than guessing at parts. If the house has rooms that won't cool or warm evenly, the cause of an uneven house actually investigated, not written off as "just how old houses are."
We work on residential systems, multi-family properties, rental units, and commercial buildings. If you manage a property in Cobb County and need a repair turned around quickly, call us and we'll get the repair scoped and scheduled.
Keeping a home comfortable starts with a system that runs right, and getting it there covers more ground than most people expect. Here is what we handle:
We do code-compliant HVAC work on every job, whether it is a single thermostat swap or a full system replacement. Pick up the phone and we'll get started.
The homes and systems in this area have their own demands, and Georgia's climate drives most of them. Hot, humid summers put real load on cooling equipment. Winters are mild compared to the Midwest, but temperatures drop enough that a heating system that can't keep up is a genuine problem. The three services below come up regularly in Kennesaw and across Cobb County for reasons that are specific to this climate.
When a system is past the point where repair makes sense, whether it is a 20-year-old furnace that keeps failing or a condenser that has lost capacity, replacement is the right call. Georgia's climate means AC capacity matters just as much as heating capacity. A correctly sized system handles the peak cooling load on a humid August afternoon and still warms the house efficiently on a cold night in January.
A full replacement involves removing the old equipment, sizing the new unit to the actual load of the space, and installing the air handler, condenser, and coil as a matched system. A single-unit swap, replacing just the condenser or just the air handler, is also an option when the rest of the system is in good shape. Before the visit closes, the thermostat confirmed as communicating before sign-off, and the system is running in the mode it was installed for.
Cobb County's climate is well-suited to heat pumps. Mild winters mean the heating load rarely pushes into the range where a heat pump loses efficiency, so the equipment handles both heating and cooling without the fuel demands of a gas furnace. That is why heat pump adoption across Georgia and the surrounding states has been growing steadily.
Installation involves removing or supplementing the existing system, running refrigerant lines, and commissioning the unit in both heating and cooling modes before the job is done. Ductless mini-split heat pumps are an option for spaces without existing ductwork or for additions where extending the central system is not practical. If an existing heat pump has failed, repair and replacement are both available depending on what the diagnosis finds.
Georgia summers bring sustained high humidity that a well-running AC system alone cannot always address. A house that reaches the right temperature but still feels muggy is a comfort problem, and it can also affect indoor air quality over time. High indoor humidity creates conditions where mold and dust mites are more likely to take hold.
A whole-home dehumidifier integrates directly into the duct system and pulls excess moisture from the air supply before it reaches the living space. That is a different solution from a portable unit sitting in one room. A ducted system handles the whole house, works alongside the AC rather than against it, and does not require emptying a reservoir. We'll get your heating and cooling running again, and if humidity is part of the picture, we'll address that too.
Ready to get the comfort back? A Georgia summer without AC and a January night without heat are two different problems with one thing in common: neither one can wait until next week. Emergency calls are answered, and when you phone ahead, we can often fit the work in quickly depending on what the schedule holds.
We pick up the phone. We scope the job. We book the visit.
Call in, describe what the system is doing, and we will walk through what is likely happening and what the visit will cover. That conversation happens before anything is scheduled, so you know what to expect. Whether it is a home in Kennesaw, a rental unit in Acworth, or a commercial building in Marietta, the process is the same.
The homes and systems in this area have their own demands, and so do the questions that come with a repair or replacement call. The most common one is what it is going to cost. The honest answer is that it depends on what the system is, how old it is, and what the diagnosis finds.
Here is what we can tell you before the visit: you get the service call rate on the phone, before anything is scheduled. The person who comes out identifies the cause, explains what the repair involves, and gives you the price for the work before it starts. Costs vary by system type, the parts involved, and the scope of what needs to be done. Ask what it covers and you get a straight answer.
There is no pressure to approve work on the spot, and no obligation to proceed if the scope is not what you expected. We're ready to get your heating and cooling running again, and that starts with a conversation, not a commitment.
We serve residential and commercial properties throughout Kennesaw and the wider northwest Atlanta metro. That includes homes, rental properties, HOA communities, office buildings, and retail spaces across Cobb County and the towns around it.
Service area covers:
If you are outside Kennesaw but in the surrounding area, call and we will confirm whether your address falls within our service range.
The outdoor unit inspection covers the condenser coil for dirt and debris blocking airflow, the capacitor and contactor for signs of wear or failure, refrigerant pressure to check for loss or leak, and the fan motor for correct operation. On a heat pump, the reversing valve and defrost cycle are also checked, since those components determine whether the unit can switch correctly between heating and cooling modes. The inspection is a starting point for the diagnostic, not a substitute for it. If the outdoor unit checks out, the investigation moves to the air handler and the duct system.
The diagnostic starts with the equipment and works outward. If the system is producing the right temperature at the air handler but rooms are still too hot or too cold, the investigation moves to airflow and duct distribution. Leaking ducts, collapsed flex duct, or a return that is undersized for the space can all produce uneven temperatures without any failure in the equipment itself. The cause of an uneven house is actually investigated rather than assumed, because the fix depends entirely on where the problem is.
Uneven temperatures from room to room are usually a duct problem, a load problem, or both. A room at the end of a long duct run may not receive enough airflow, especially if the duct has a leak or a kink somewhere along the way. A room with large south-facing windows or poor insulation may simply have a higher cooling or heating load than the system was sized to handle. The visit covers both possibilities before a fix is recommended.
Common signs include the system running longer than it used to before reaching the set temperature, the house feeling humid even when the AC is running, refrigerant lines icing over at the air handler, or the system cycling on and off repeatedly without completing a full cooling cycle. A condenser that is louder than it used to be or that vibrates noticeably is also worth a service call. Catching these signs before the system fails completely gives more options for repair versus replacement.
Short-cycling, where the furnace starts and shuts off before the house reaches temperature, is often caused by a clogged filter restricting airflow, a failing flame sensor that cannot confirm ignition, or a limit switch tripping because the heat exchanger is overheating. Cold air from a furnace that is running points to an ignition failure or a gas valve problem that is preventing the burner from lighting. Both situations are diagnosable on a service visit, and the fix depends on what the inspection of the burner, heat exchanger, and control circuit actually finds.
A repair addresses a specific failed component: a capacitor, a contactor, a refrigerant leak, a blower motor. Replacement means removing the existing equipment and installing a new system sized and matched for the space. The right answer depends on the age of the system, how many times it has been repaired, whether the failure is in a component or in the core equipment, and what the cost comparison looks like over the next several years. Both options get explained with pricing before any work is agreed.
Rooftop unit service follows the same diagnostic process as ground-level equipment: the inspection covers the coil, the refrigerant circuit, the electrical components, and the controls. Access and safety requirements for rooftop work are confirmed before the visit, and the scope of what the visit covers is explained on the call. Commercial properties with multiple rooftop units can be quoted for maintenance visits that cover all units in a single scheduled appointment.
Call (470) 995-9879 and describe the property and we will scope the job from there.
Turn the thermostat to off if the system is making unusual noises, producing a burning smell, or running continuously without any effect. If the system has simply stopped producing heat or cooling but is otherwise quiet, leaving it off prevents repeated failed start attempts. Open or close interior doors to help distribute whatever residual temperature is in the house. Do not attempt to open the equipment or remove panels while waiting for the visit.
Emergency calls are answered, and short-notice service is available when the schedule allows. When you call, the situation gets scoped on the phone and availability for that day is confirmed in the same conversation. We do not promise a specific arrival window, but we do confirm what the schedule can accommodate before anything is booked.
Call (470) 995-9879 as soon as the system goes down.
A heat pump that blows cool or lukewarm air in heating mode is often in a defrost cycle, which is normal and temporary. If the system blows cold air consistently and never warms the space, the reversing valve may be stuck in cooling mode, the refrigerant charge may be low, or the auxiliary heat strips that supplement the heat pump in colder weather may have failed. The diagnostic covers all three possibilities before a repair is quoted.
Repair, installation, replacement, maintenance, emergency calls. We cover the full range of heating and cooling work for homes and commercial properties across Cobb County, every day from 9:00 AM to 8:00 PM.
Clear answers. Real pricing. Real fast response.
We pick up the phone and take care of it.
Call (470) 995-9879 for a quote on any HVAC repair, installation, or service.
Tell us what the system is doing and we will get the job scoped from there. Call us and we'll handle the rest.
Heating and cooling work covers a wide range of jobs, and knowing what each service involves helps you make the right call before anything is scheduled. The table below lays out what we handle, who each service fits, and a practical note worth knowing before you call. If a service is not listed or you are not sure which one applies to your situation, call us and we will scope it on the phone.
| Service | What's Included | Best For | Things to Know |
|---|---|---|---|
| Heating & Furnace Repair | Ignition and flame sensor inspectionHeat exchanger checkBlower motor testingControl board and limit switch diagnosis | Homes where the furnace is not reaching temperature, short-cycling, or blowing cold air | Cobb County winters are mild but real. A furnace that limps through one cold snap may not make it through the next without a repair. |
| Emergency HVAC Service | Short-notice calls are taken when the schedule has room.No-heat and no-cool calls takenDiagnosis and repair quoted on the visitAvailable every day 9 AM to 8 PM | Any home or commercial property where the system has gone down and waiting is not an option | Call in and describe what the system is doing. We scope the situation on the phone and confirm what the schedule can accommodate in the same conversation. |
| Thermostat & Smart-Control Installation | Programmable thermostat replacementSmart thermostat integrationZoning control setupCommunication verification with air handler and condenser | Homeowners upgrading from an older thermostat or adding scheduling and remote control to an existing system | A thermostat that is not communicating correctly with the air handler can cause short-cycling or temperature swings even when the equipment itself is in good shape. |
| Indoor Air Quality & Air Filtration | Whole-home air filtration installationUV air treatment systemsVentilation assessmentHumidity and particulate concerns addressed | Households dealing with allergens, dust, odors, or air quality concerns that the AC alone does not resolve | Georgia's humid summers create conditions where mold and dust mites are more likely to take hold indoors. Filtration and humidity control together address more of the problem than either one alone. |
| Seasonal Maintenance & Tune-Ups | Coil cleaning and airflow checkRefrigerant pressure verificationElectrical component inspectionThermostat and controls confirmed | Homeowners and property managers who want to catch small problems before they become expensive failures | Spring AC tune-ups before the heat builds and fall furnace tune-ups before the first cold snap are the two most useful windows in this climate. A system that gets checked regularly fails less often at the worst time. |
| AC Repair & Service | Condenser and coil diagnosisRefrigerant leak detectionCapacitor and contactor testingAirflow and pressure checks | Homes or buildings where the AC is running but not cooling, short-cycling, or making unusual sounds | Georgia's long cooling season means AC problems often surface in May before the first real heat wave. Catching a failing component early avoids a full breakdown in July. |
| Whole-Home Dehumidification & Humidity Control | Ducted whole-home dehumidifier installationIntegration with existing HVAC systemMoisture load assessmentIndoor air quality improvement | Georgia homes that reach the right temperature but still feel muggy or show signs of elevated indoor humidity | A ducted dehumidifier works alongside the AC rather than competing with it. It handles the whole house and does not require emptying a reservoir the way a portable unit does. |
| Full System Installation & ReplacementMost Popular | Load calculation and equipment sizingAir handler and condenser replacementMatched system commissioningThermostat communication verified before sign-off | Homes or commercial properties where the existing system is past the point of repair or has lost capacity | A correctly sized system handles peak cooling load on a humid August afternoon and still heats efficiently on a cold January night. Sizing to the actual load of the space is part of every installation. |
| Heat Pump Installation | Existing system removal or supplementationRefrigerant line installationDuctless mini-split option for spaces without ductworkCommissioning in both heating and cooling modes | Kennesaw and Cobb County properties replacing a gas furnace or aging AC with a single system that handles both seasons | Mild winters in this area mean heat pump efficiency rarely drops into the range where supplemental heat carries the load. That makes heat pumps a practical fit for most residential properties here. |
| Heat Pump Repair & Service | Reversing valve diagnosisRefrigerant charge checkDefrost cycle testingHeating and cooling mode verification | Properties with a heat pump that will not heat, will not cool, or runs constantly without reaching setpoint | Heat pumps are well-matched to Georgia's climate, but a stuck reversing valve or low refrigerant charge shows up in both modes. Diagnosis covers both before a repair is quoted. |
| Ductwork Repair & Sealing | Duct leak detectionFlex duct inspection and repairReturn sizing assessmentSealing and re-insulation of problem sections | Homes with uneven temperatures, high utility bills, or rooms that never seem to reach the thermostat setting | Leaky ducts can bleed conditioned air into unconditioned space before it reaches the living area. Sealing the duct system often improves comfort without any change to the equipment. |
How often should a heating or cooling system be tuned up?
Once a year is the baseline for most systems, and the timing matters. A spring tune-up before the first heat of the season gets the AC checked while there is still time to address a problem before it fails mid-July. A fall tune-up before the first cold snap does the same for the furnace or heat pump. Properties with older equipment or high run-hours may benefit from checking both systems in the same season rather than waiting for a symptom to show up.
How do duct leaks affect energy bills and comfort?
A duct system with significant leaks bleeds conditioned air into unconditioned space, typically an attic or crawlspace, before it ever reaches the living area. The equipment runs longer to compensate, which raises utility costs without improving comfort. Rooms at the end of long duct runs feel it first, since they receive the least airflow to begin with. Sealing the duct system addresses the loss at the source rather than asking the equipment to work harder.
What do strange noises from an HVAC unit usually mean?
The sound often points to a specific component. A rattling or banging noise from the outdoor unit can indicate a loose fan blade or debris inside the cabinet. A squealing sound from the air handler usually points to a blower motor bearing that is wearing out. A clicking sound at startup or shutdown is sometimes normal, but repeated clicking without the system lighting off is often a sign of an ignition or flame sensor problem in a furnace. A grinding noise from any part of the system is worth a call before the component fails completely.
System Checked Before Parts Are Quoted
We diagnose the cause before recommending a repair. That means the quote you get is based on what the system is actually doing, not a best guess from a description over the phone.
How does a dirty filter or coil affect system performance?
A clogged filter restricts airflow through the air handler, which makes the system work harder to move the same volume of air. Over time that restriction can cause the evaporator coil to ice over, which stops cooling entirely. A dirty condenser coil outdoors has the same effect on the heat rejection side: the system cannot shed heat efficiently, so it runs longer and works harder on every cycle. Changing the filter on schedule and keeping the outdoor unit clear of debris are the two simplest things a homeowner can do to protect the equipment.
What does a thermostat or smart-control upgrade actually involve?
The visit covers removing the existing thermostat, confirming the wiring at the air handler and condenser, and installing the new control. Smart thermostats require a common wire in most installations, and older homes sometimes do not have one run to the thermostat location. That is checked before the visit is closed. Before sign-off, the thermostat is confirmed as communicating with both the heating and cooling sides of the system, and the scheduling or zoning controls are set up and tested.
When does it make more sense to replace a system than to repair it again?
The answer depends on the age of the equipment, the cost of the repair, and how many repairs it has already needed. A system that is 15 years or older and needs a compressor or heat exchanger replacement is often at the point where the repair cost approaches a significant fraction of a new system. A newer system with a first-time component failure is usually worth repairing. We explain both options with pricing before any work is agreed, so the comparison is in front of you before you decide.
Code-Compliant Work on Every Job
Whether the job is a thermostat swap or a full system replacement, the work meets the code requirements that apply to this area. That matters for resale, for inspections, and for any manufacturer coverage tied to the equipment.
Do I need to be home for an HVAC service visit?
For most work, yes. The person who comes out needs access to the equipment, which is typically inside the home as well as outside. If the visit covers only the outdoor unit and access to the yard is available, it may be possible to arrange otherwise, but that is confirmed on the call when the job is scoped. For any work that involves the air handler, ductwork, or thermostat, someone needs to be on the property.
How does the pricing conversation work before a visit is scheduled?
You get the service call rate on the phone before anything is booked. The person who comes out diagnoses the cause, explains what the repair involves, and gives you the price for the work before it starts. If the job turns out to be more involved than the initial description suggested, that gets explained before the scope is expanded. There is no pressure to approve work on the spot and no obligation to proceed if the scope is not what you expected.
Older Systems and New Installs Both Covered
We work on equipment across the full age range, from a 20-year-old furnace that needs a flame sensor to a new heat pump being commissioned for the first time. The diagnostic process is the same either way.
What are the signs of a failing compressor or blower motor?
A failing compressor often shows up as the AC running but not cooling, a hard start where the outdoor unit struggles to come on, or the breaker tripping when the compressor tries to start. A blower motor that is wearing out may produce a squealing or grinding noise from the air handler, reduced airflow at the registers, or a system that runs but moves very little air. Both components are diagnosed on a service visit before a repair or replacement is recommended.
How do you choose between a gas furnace and a heat pump?
In Cobb County's climate, the choice often comes down to fuel costs, existing infrastructure, and how cold winters actually get. Heat pumps handle both heating and cooling from a single system and are efficient in mild winter conditions, which describes most of the season here. A gas furnace heats faster and handles deep cold more effectively, but Georgia winters rarely push into the range where a heat pump loses meaningful efficiency. If the home already has a gas line and the furnace is being replaced, both options are worth comparing on the call.
How long does a full system replacement typically take?
Most residential replacements are completed in a single day. The scope includes removing the old equipment, installing the new air handler and condenser as a matched system, connecting the refrigerant lines, and commissioning the unit in both heating and cooling modes before the visit closes. Larger or more complex installations, such as a multi-zone system or a home with access challenges, may take longer. The expected timeframe is part of the conversation when the job is scoped.
Call us at (470) 995-9879 and we will scope the job on the phone, explain what the visit covers, and get it scheduled from there.
(470) 995-9879