24/7 HVAC Service in Kennesaw, GA

A few safe checks can solve a simple problem or give the technician a head start. None need tools or opening the equipment.

1. Thermostat. Confirm the mode (cool or heat), the setting and the batteries.
2. Filter. A filter packed with dust or pollen chokes airflow and can freeze an AC coil. Replace it if dirty.
3. Breaker. Check whether the HVAC breaker has tripped. You can switch it back on once. If it trips again, leave it off and tell us.
4. Drain pan. Standing water under an attic or closet unit, or a wet ceiling, means a clogged drain. Turn the system off at the thermostat.
5. Vents. Make sure vents and return grilles are open and unblocked.

Turn the system off and call when you see

• Water dripping through a ceiling or standing in the pan
• Heavy ice on the outdoor unit or the refrigerant lines
• A burning or electrical smell, or exposed wiring
• A breaker that trips again after one reset
• No heat during a hard freeze, or indoor temperatures unsafe for a baby, an older adult, someone ill or a pet

What to tell us when you call

Say whether the problem is no air, warm air, weak airflow, water, ice, a noise or a smell, and what you already checked. Mention the system type if you know it (central AC with a gas furnace, heat pump, or not sure), whether the home is occupied or a rental, and who can give the technician access. If you can do it safely, photograph the thermostat display, the unit's model plate and any blinking error code. Photos help the technician arrive prepared; they do not replace an on-site diagnosis.

For a breakdown that cannot wait, our 24/7 emergency HVAC repair page explains what happens next.

A good HVAC contractor tests before replacing parts. Swapping a capacitor because the symptom "sounds like" a capacitor is how people pay for two repairs instead of one. On a no-cool or no-heat call, the technician works through the system in order:

1. Confirm the symptom. Thermostat mode, set point, wiring and what the system actually does when it calls for cooling or heat.
2. Power and safety controls. Breakers, disconnects, fuses, the float switch and, on a furnace, the limit and pressure switches.
3. Airflow. Filter condition, blower operation, return and supply temperatures, and obvious duct restrictions.
4. Indoor and outdoor components. Capacitors, contactors, motors, coils, the condensate drain and, when the evidence points there, refrigerant pressures.
5. The finding, explained. What failed, why, how urgent it is, and whether it is one part or a sign of a bigger airflow, duct or sizing problem.

Then you get the price in writing before work starts. After an approved repair, the technician tests the system, cleans up the work area and tells you what to watch for. Technicians who connect gauges or handle refrigerant must hold EPA Section 608 certification, the federal credential for refrigerant work.

From May through September, Kennesaw's summer highs average 87 to 89°F with heavy humidity, so air conditioners run long cycles day after day. That is when weak capacitors, failing fan motors, low refrigerant and clogged condensate drains show up. If your AC is running but the house is not cooling, start with our AC not cooling checklist, then call for AC repair.

Heating season runs roughly November through February. Winter lows average 30 to 33°F, and hard freezes do happen: the December 2022 arctic blast pushed metro Atlanta into single digits. Furnaces that sat idle all summer show igniter, flame sensor and pressure switch problems on the first cold night. Our guide to a furnace not turning on covers the safe checks, and furnace repair handles the rest. Heat pumps face their own cold-snap test, covered on our heat pump repair page. The mild months in between are the best time for a spring or fall tune-up: AC in spring before the May rush, heating in early fall before the first cold snap.

A good tune-up checks the condensate drain, electrical parts such as capacitors and contactors, airflow, controls and safety devices, and on a furnace the burners, flame sensor and venting. Ask what the visit includes and what it does not, and ask for written findings if a repair is recommended. Maintenance finds developing problems; it cannot promise a system will never fail. Between visits, the U.S. Department of Energy recommends keeping filters clean, and in pollen season that can mean checking them monthly.

Nobody should be sold a system they do not need, or keep patching one that is finished. The technician weighs a few concrete things:

• Age. Here, a central AC typically lasts 12 to 15+ years, a gas furnace 15 to 20+ and a heat pump 10 to 15.
• Refrigerant. An R-22 system needs reclaimed refrigerant for any recharge, which is costly. R-410A systems remain serviceable.
• The failed part. A capacitor or contactor is a very different decision from a compressor or a cracked heat exchanger.
• Repair history. Several repairs in two or three seasons usually point one way.
• Comfort. If some rooms never felt right, a properly sized replacement based on a Manual J load calculation can fix what a repair cannot.

Before replacing anything, rule out the problems a new unit will not fix: leaky or undersized ducts, restricted airflow, poor attic insulation and condensate issues. If replacement still makes sense, the written quote should list the equipment model, capacity, SEER2 efficiency, labor, permit, removal and disposal, startup and warranty terms. For a big decision, getting a second written quote is reasonable, and ENERGY STAR ratings are a fair way to compare efficiency between options.

You get the facts and a price for each option, then you choose. Our guide to whether you should repair or replace an old AC goes deeper, and the AC installation and replacement page covers sizing, SEER2 and installation day.

We do not post a price list, because the same symptom can be a small part or a failed compressor, and a quote without a diagnosis is a guess. What we can tell you is what moves the price, so the number you hear makes sense:

• The part and the cause. A capacitor or contactor swap, a drain clearing and a compressor replacement are very different jobs.
• Access. An attic air handler in July takes longer and is harder to work on than a unit in a garage or basement.
• Refrigerant type. R-22 is only available as reclaimed stock and costs far more than R-410A to recharge.
• Timing. Nights, weekends and holidays may carry an after-hours rate set by the contractor.
• Warranty status. Parts may still be covered by the manufacturer, which changes the bill.

Questions to ask about the diagnostic fee

Ask about the diagnostic or service-call fee when you call, before anyone is dispatched: what it covers, whether it changes after hours, and whether it is credited toward an approved repair. Policies vary by contractor, so ask rather than assume.

What a written quote should list

The diagnosis, the parts, the labor, any permit, removal and disposal, startup, parts and labor warranty terms, and how long the quote is good for. Our guide to AC repair cost in Kennesaw walks through each factor.

If a replacement comes with a financing offer

Some contractors offer third-party financing on new systems. If you are offered it, compare the cash price and the financed price side by side, along with the interest rate, term, fees, deposit, cancellation terms and total repayment. A low monthly payment does not tell you the total cost.

Every HVAC contractor we send is licensed and insured in Georgia. You should still feel free to check. Here is what to look for with any contractor, ours included.

The Georgia Conditioned Air Contractor license

Georgia licenses HVAC contractors statewide through the State Construction Industry Licensing Board. A Class I (restricted) license covers systems up to 175,000 BTU of heating and 60,000 BTU of cooling, which includes most homes. A Class II license is unrestricted. The license belongs to the contracting company, so ask the technician for the contractor's license number and look it up on the Georgia Secretary of State license verification site, where you can confirm it is active.

Other credentials and paperwork worth asking about

• EPA Section 608 certification for any technician who handles refrigerant.
• Proof of insurance before work starts on your property.
• A mechanical permit for equipment replacement, pulled by the licensed contractor through the City of Kennesaw or Cobb County depending on your address.
• Written warranty terms for parts, labor and the equipment, including who registers the manufacturer warranty.
• Load-based sizing. A replacement should be sized with an ACCA Manual J load calculation, not by copying the old tonnage.

Reviews and proof of work

Read recent reviews on independent platforms and look for dated, specific descriptions of the problem and the fix. A star rating cannot replace a license check or a written quote.

About two-thirds of Kennesaw homes are owner-occupied. Many of the rest are rentals owned by landlords and investors, especially near Kennesaw State University.

Landlords and property managers need a tenant's cooling or heat restored without driving over themselves. When you call, tell us who will provide access and who approves the price, and the technician will work with that person. Townhomes and apartments near campus often run heat pumps, so the heat pump repair page is a good place to start for those units.

Small offices and shops along Barrett Parkway, Chastain Road and Cobb Parkway can call the same number. Light commercial work depends on the equipment and the contractor's license scope, so describe the system when you call and we will tell you plainly whether we can send someone.

Whatever the property, a tenant's no-heat call on a freezing night gets the same 24/7 answer as an owner's.