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Diagnosis first, numbers second - you approve the repair price before a single part goes in.
Get your free estimateTrusted AC Repair for Marietta Homeowners
When your air conditioner quits in a Marietta summer, you need a straight answer on what’s wrong, what it costs, and how fast someone can get there. If you’re wondering how much AC Repair costs, our Marietta jobs typically run between $150 and $650 depending on the part and the work involved, and most are completed the same day we diagnose them. Cold Harbour Heating and Air Marietta has been fixing residential cooling systems since 2003, and our technicians arrive in uniform with a written price in hand before any work begins. Victor Mancini leads our team, and he holds every job to the same standard: if a repair fails within 365 days, we come back and fix it at no charge. That guarantee is on paper, not just a promise. Call (762) 240-5599 and a live person answers, day or night.
We know Marietta’s cooling season from May through September. We know the pollen that collects on condenser coils in spring and the humidity that forces systems to work harder in July. We service the neighborhoods off Canton Road, around the Square, down Whitlock Avenue, and through East Cobb with AC Repair - Marietta expertise built on years of local work. This is our home territory, and the way we work reflects it: we show up in the window we give, we hand you the price before we open the toolbox, and we leave the job site cleaner than we found it. That’s the Kingswell Way, and it’s been the operating standard since day one.
AC Maintenance
AC Maintenance is the scheduled service work that keeps your cooling system running clean and catches small problems before they become mid-summer breakdowns. In Marietta’s climate, where your air conditioner runs hard for six months straight, most manufacturers and HVAC professionals recommend a maintenance visit once a year, ideally in late winter or early spring before the heat arrives. Cold Harbour Heating and Air Marietta performs maintenance visits that run between $80 and $200 depending on the system’s age and condition, and every visit ends with a written report of what we found and what we did.
The Spring Tune-Up Check
Our AC Repair Maintenance Checklist for Marietta Homeowners starts before the first 90-degree day: we inspect the condenser coil for pollen and leaf buildup, test the refrigerant level, measure airflow, and check every electrical connection. A coil caked with spring pollen can drop efficiency by 15 percent or more. Our technicians wash the coil, check the capacitor’s microfarad reading with a digital meter, and test the contactor for pitting or wear.
What Maintenance Prevents
Most no-cooling calls we get in July trace back to something a spring maintenance visit would have caught: a weak capacitor holding on by a thread, a dirty coil driving up head pressure, or a condensate drain line clogged with algae and dust. A drain line that backs up can flood a hallway or closet, and the repair bill for water damage far exceeds the cost of a maintenance visit. We clear the drain line, treat it to slow regrowth, and verify the float switch actually kills the system if water rises.
Styles & brands we work with
AC Service
AC Service is the broader term for any professional work done on your air conditioning system, from diagnostics and adjustments to repairs and component replacements. You need AC service when your system makes noises it shouldn’t, cycles on and off too often, or just can’t keep up with the thermostat setting on a typical Marietta afternoon. Cold Harbour Heating and Air Marietta prices AC service calls between $150 and $650, and the written quote you get before work starts includes parts, labor, and any refrigerant needed, so there’s no surprise addition at the end.
Diagnostic-Only Visits
Sometimes you just need to know what’s wrong. Our technician will inspect the whole system, test the key electrical and refrigeration components, and give you a written diagnosis with options and prices. You’re never obligated to proceed, and the diagnostic fee is always stated before we schedule the visit. If you approve the repair, that fee is credited toward the work.
Full System Checkups
An AC service call can also be a complete health check for your cooling system. Victor Mancini trains our technicians to measure temperature drop across the coil, verify refrigerant subcooling or superheat against manufacturer specifications, and inspect the duct connections visible from the equipment. We’ll tell you honestly whether your system has years left or whether you should start planning a replacement, and we’ll never push a new unit when a repair makes more sense.
AC Unit Repair
AC Unit Repair means fixing the mechanical and electrical components inside or connected to your air conditioning system: the compressor, fan motor, blower motor, contactor, capacitor, coil, or wiring. When a part fails, the system either stops cooling entirely or limps along until the next heat wave finishes it off. Cold Harbour Heating and Air Marietta handles AC unit repairs across Marietta with the same upfront number every time, and those repairs fall between $150 and $650 in most cases, with the final written quote in your hand before we begin.
Mechanical Failures
Motors and compressors are the heavy lifters. A condenser fan motor that seizes up will overheat the compressor and trip the system’s high-pressure switch, leaving you with warm air and a humming outdoor unit. We replace motors with OEM or equivalent-spec parts, verify the rotation and amp draw, and test the system through a full cooling cycle before we leave.
Electrical Failures
Capacitors, contactors, relays, and control boards handle the switching and starting duties in your AC unit. When a contactor’s points burn or pit, the compressor may short-cycle or refuse to start at all. Our technicians carry common capacitors, contactors, and relays on the truck for all the major brands we service, so a single visit often solves the problem.
AC Capacitor Replacement
AC Capacitor Replacement is the process of swapping out the small cylinder-shaped electrical component that gives your compressor and fan motor the starting jolt they need to spin up. Capacitors are the single most common failed part we find on Marietta AC units, especially after the system sits idle through winter and then gets asked to work hard on the first hot day of spring. A capacitor replacement on its own typically runs $150 to $300 including the part, the labor, and the service visit, and Cold Harbour Heating and Air Marietta keeps them stocked on the truck for most brands.
Signs of a Failing Capacitor
A weak capacitor usually announces itself with a humming outdoor unit that won’t start, a fan that spins slowly or won’t start without a push, or a system that runs a few minutes and then shuts off. We test capacitors with a digital multimeter that measures microfarads, and if the reading is more than 10 percent below the labeled rating, it’s time to replace it.
Dual-Run Capacitors
Most modern AC condensers use a dual-run capacitor that serves both the compressor and the fan motor with a single unit. When one side weakens, both components are affected. We always check the capacitor on every AC repair visit because a marginal capacitor can overheat a motor and turn a $200 fix into a $600 motor replacement. The written quote reflects the actual capacitor your unit needs, not a generic price.
AC Recharge
AC Recharge is the process of adding refrigerant to your air conditioning system, which is the cooling fluid that absorbs heat from your home’s air and releases it outside. When the refrigerant level drops below the manufacturer’s specification, the coil gets too cold in spots and freezes, or the system just stops pulling heat out of the house. A recharge in Marietta runs between $150 and $400 depending on how much refrigerant the system needs and which type it uses, and Cold Harbour Heating and Air Marietta always checks for a leak before adding anything.
Finding the Leak First
Refrigerant doesn’t get used up like gasoline. If the level is low, there’s a leak somewhere in the coil, the lines, or the service valves. We pressure-test with nitrogen and use an electronic leak detector or UV dye to find the source. Adding refrigerant without fixing the leak is a temporary fix, and we’ll tell you that plainly before anyone touches the system.
R-22 and R-410A Systems
Older Marietta homes built through the 1990s often have R-22 systems, and R-22 is now expensive and increasingly scarce. We’ll give you the honest numbers: what a recharge costs versus what a replacement system would save you in efficiency and repair cost over the next few years. We service both R-22 and R-410A systems, and we’ll never sell you a recharge on a system that’s already leaking too fast to justify it.
Emergency AC Repair
Emergency AC Repair is the after-hours, weekend, and holiday service we provide when your air conditioner fails during a Marietta heat wave and waiting until Monday isn’t acceptable. When the heat index climbs past 100 and there’s an infant, an elderly parent, or a medical condition in the house, a dead AC stops being a comfort issue and becomes a safety issue. Cold Harbour Heating and Air Marietta answers the phone with a live person 24 hours a day, 7 days a week, 365 days a year, and emergency repairs fall within our standard $150 to $650 range, often with next-morning arrival even for overnight calls.
Overnight and Weekend Calls
We built our phone coverage around the fact that AC systems don’t fail on a schedule. The capacitor that gives out on a Saturday afternoon or the compressor that trips at 2 a.m. gets the same attention as a weekday call. You’ll talk to a person, not a voicemail tree, and we’ll schedule a technician with a firm arrival window that same day or first thing the next morning.
When Waiting Is Risky
Certain homes should not wait out a heat wave without cooling: households with infants under six months, adults over 75, anyone with heart or respiratory conditions, and pets left indoors during the day. We triage these calls with urgency and get a technician out faster when the situation calls for it. If you’re ever unsure whether a problem counts as an emergency, call (762) 240-5599 and describe what’s happening. We’ll help you decide whether it can wait until morning or needs a technician now.
AC Not Blowing Cold Air
AC Not Blowing Cold Air is the most common call we get in Marietta, and it has a cluster of usual causes: a tripped breaker, a frozen indoor coil, a failed capacitor, or a refrigerant leak being the top four. When your system is running but the air coming out of the registers feels warm or only slightly cool, the best move is to turn the system off at the thermostat and call us. Continuing to run a frozen or low-refrigerant system can damage the compressor, and that’s the difference between a $300 repair and a $5,000 replacement. Cold Harbour Heating and Air Marietta diagnoses no-cooling calls for a standard service visit, with most repairs falling between $150 and $650.
Frozen Coil Causes
An indoor coil that ices over usually points to low refrigerant or poor airflow from a dirty filter or a failing blower motor. In Marietta’s humidity, a slightly low charge can freeze a coil in an afternoon. Our technician will thaw the coil, find the root cause, and fix it so it doesn’t refreeze the next week. We’ll also check your filter and show you which MERV rating to buy.
Airflow and Duct Issues
Sometimes the system is producing cold air, but it’s not reaching the rooms. Collapsed flex duct, a disconnected return, or a blower wheel caked with years of dust can all cause weak airflow. We inspect the accessible ductwork and measure static pressure to see whether the system is breathing the way it should. The problem is often fixable in one visit, and the price is on the table before we start.
Brands We Service
Our technicians are trained and stocked to work on nine major residential HVAC brands, and that includes Trane, Lennox, Goodman, and Rheem. We’ve repaired hundreds of Trane units across Marietta and East Cobb, and we’re familiar with their aluminum spine-fin coils and the specific compressors they ran through the 2010s. When a Trane needs a part, we know which supply houses in Cobb County carry it and which aftermarket equivalents hold up.
Lennox systems have their own quirks, especially the variable-speed models with proprietary control boards. We work on those boards and the communicating thermostats that come with them, not against them. Goodman and Rheem are common in newer Marietta construction and in the swaps done by investors before a home sale; we see a lot of both brands and carry the capacitors, contactors, and fan motors that fit them. Whether you have one of those makes or any other system we service, we can have a technician at your door in Marietta with a written price before the first tool comes out, and we also offer our AC Repair in Smyrna for homes just south of the city.
See the difference
Before
After
Before
After
Before
AfterSigns You Need a Pro Right Now
- Warm air from the registers when the thermostat is set to cool. This is the clearest sign your system isn’t doing its job. It could be a trip or a leak, but running the system in this state can stress the compressor into failure.
- Ice forming on the copper lines or the indoor coil. A frozen coil blocks airflow and can send liquid refrigerant back toward the compressor, which destroys compressors. Turn the system off and call us before the ice spreads.
- Humming or clicking from the outdoor unit while the fan stays still. That sounds like a failed capacitor or a seized fan motor. Running the system this way for even a few hours can overheat and damage the compressor.
- Water pooling around the indoor unit or staining the ceiling below an attic system. A clogged condensate drain or a rusted drain pan is at work. Water damage in a Marietta home adds up fast, and the fix is usually straightforward if we get there early.
- A burning smell or a tripped breaker that won’t stay reset. Both point to electrical trouble in the system. A breaker that trips repeatedly is protecting your house from a short or an overload, and the underlying problem needs a technician to trace it safely.
Our Process, Step by Step
- 1
Call and talk to a living person. You’ll reach us any time of day or night. We ask a few questions about what your system is doing, and we schedule a firm window, not a four-hour guess.
- 2
The technician shows up on time and in uniform. Victor Mancini holds every technician to a simple standard: be on time, be recognizable, and be respectful of the house. You’ll know who’s at your door before you open it.
- 3
Diagnosis with instruments, not guesses. We test refrigerant pressures with manifold gauges, measure capacitor microfarads with a meter, check voltage and amp draw at the contactor, and inspect the coil and drain line. The diagnostic fee and the diagnosis itself are both put in writing.
- 4
A written price before any work starts. You get the full number: parts, labor, refrigerant, everything. That number does not change at the door, and you can say no with no pressure and no hard feelings. If you approve, we do the work right then in most cases.
- 5
A written 365-day guarantee and a clean site. Every repair is guaranteed in writing for a full year. If it fails inside that window, we come back and make it right at no charge. We also sweep, wipe, and put everything back where we found it before we leave.
How Much Does AC Repair Cost in Marietta?
Most AC repairs in Marietta run between $150 and $650, with the most common jobs landing on the lower end. A capacitor replacement typically costs $150 to $300 including the part and the visit. A refrigerant recharge runs $150 to $400 depending on how much the system needs and which refrigerant it takes. A contactor replacement, a drain line clearing, or a small electrical fix usually lands in the $150 to $250 range. More involved jobs like a blower motor replacement or a condenser fan motor replacement can push toward the top of the range, but we hand you the written price before any work begins, so the number is never a surprise.
What moves the price one way or the other is mostly the part and the access. A rooftop unit or an attic system in a Marietta ranch house takes longer to reach than a ground-level condenser. Older systems, especially R-22 units, cost more to recharge because the refrigerant itself is expensive. And systems that haven’t been maintained regularly often have multiple small problems that all need addressing. The way to avoid overpaying is to get the diagnosis in writing, ask what each line item covers, and work with someone who doesn’t profit from selling you parts you don’t need. Our technicians are not paid on commission, and Victor Mancini checks the diagnosis on high-dollar jobs before the work proceeds. A free estimate means the diagnostic visit and the written quote, with no obligation to proceed.
Our Service Area Near Marietta
We run calls throughout Marietta and the surrounding Cobb County communities: Smyrna, Kennesaw, Vinings, Mableton, Acworth, and Fair Oaks, plus Woodstock and Holly Springs to the north and Roswell to the east. Most Marietta calls are reached within 60 to 90 minutes, and our AC Repair in Roswell page covers service there, while AC Repair in Woodstock covers Cherokee County. We also serve North Decatur and Dallas with slightly longer drive times. If you’re not sure whether we cover your street, call (762) 240-5599 and ask.
Serving Marietta, GA - Our Local Coverage Area
We’re based in the Marietta area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions About AC Repair in Marietta
AC repair is the diagnosis and correction of any fault that keeps your air conditioning system from cooling your home properly, from a failed capacitor or contactor to a refrigerant leak or a seized fan motor. At Cold Harbour Heating and Air Marietta, every repair starts with instrumented testing and ends with a written 365-day guarantee. If the repair fails inside that year, we return and fix it at no charge.
Most common repairs like a capacitor or contactor replacement are done in under an hour once the technician is at the unit. Larger jobs like a blower motor or condenser fan motor replacement may take two to three hours. We’ll tell you the expected time alongside the written price before we start, and we stick to that window as closely as the equipment allows.
AC repair in Marietta usually runs between $150 and $650 depending on the part, the refrigerant type, and the access to the equipment. The most common repairs land between $150 and $300. You’ll get a written price before any work begins, and that number won’t change at the door. Call (762) 240-5599 for a free estimate.
Yes. Our technicians are trained and stocked for Trane, Lennox, Goodman, and Rheem, along with five other major residential brands. We carry the common capacitors, contactors, and fan motors for these makes on the truck, and we know their failure patterns from years of Marietta service work. Whatever brand is in your home, we can likely have it diagnosed the same day you call.
Yes. A live person answers our phone every hour of every day, including weekends and holidays. If your AC fails during a heat wave and waiting isn’t safe, we’ll get a technician to your Marietta home as fast as the schedule allows, often the same day or first thing the next morning. Emergency repairs fall within our normal pricing range with no overtime rate.
Every repair from Cold Harbour Heating and Air Marietta comes with a written 365-Day Done Right Promise. If the repair fails within 365 days, we return and fix it at no charge. The guarantee is on paper and handed to you before the technician leaves, not tucked into the fine print.
Clear a path to the indoor unit and the outdoor condenser, and if you have pets that are skittish around strangers, put them in a room for the visit. It’s also helpful to have your filter size noted or an old filter set aside so we can see what you’ve been using. We’ll handle the rest, and we’ll leave the work area cleaner than we found it.
Schedule Your AC Repair Service in Marietta Today
Call AC Repair in Marietta today for a free estimate, and we’ll put a price in writing before any work begins. A live person answers 24/7 at (762) 240-5599. We’ll get your home cool again, and we’ll back the work in writing for a full year. If you need us, we’re here.
Written by Victor Mancini, Owner at Cold Harbour Heating and Air Marietta, serving Marietta since 2003.