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Diagnosis first, numbers second - you approve the repair price before a single part goes in.
Get your free estimateFast, Reliable AC Repair Across Marietta
When your air conditioner quits on a 94-degree Marietta afternoon, you need a repair company that actually answers the phone and shows up. Most AC repairs in Marietta run $150 – $650, with common fixes like capacitor replacement on the lower end and compressor work on the higher end. Cold Harbour Heating and Air Marietta dispatches crews directly to neighborhoods across Marietta, from Whitlock Avenue to East Cobb, with a live person answering calls 24/7 at (762) 240-5599. Victor Mancini and our technicians know Marietta’s housing stock well: the 1960s ranches, the early-2000s builder-grade subdivisions, and everything in between.
We serve the entire Marietta area, and our AC Repair team carries parts for Trane, Lennox, Goodman, and Rheem systems on the truck, so most jobs are done in one visit.
Why Cold Harbour Heating and Air Marietta Is Marietta’s Preferred AC Repair Company
Victor Mancini founded Cold Harbour Heating & Air in 2003 as part of the Kingswell network of independently owned HVAC businesses. The Kingswell Way is not a slogan here: it means a written price handed to you before any tool comes out, a firm arrival window, a clean job site, and a guarantee on paper. Marietta homeowners who have been burned by a no-show or a price that jumped at the door tell us that is what brought them to us.
Every repair we make in Marietta carries the 365-Day Done Right Promise. That is not verbal assurance. It is a written guarantee: if the repair fails within a full year, we return and correct the work at no charge. No argument, no second invoice. Phones are answered by a live person around the clock, every day of the year, and our technicians are background-checked and uniformed so you know exactly who is walking through your door.
Dispatch and scheduling are coordinated from the brand’s Atlanta office; crews serve Marietta locally. That structure means we can respond quickly to a compressor failure near Marietta Square or a refrigerant leak off Powder Springs Road without the overhead of a franchise.
Styles & brands we work with
AC Service in Marietta
AC Service in Marietta means more than a once-a-year look at the outdoor unit. For Marietta homeowners, it is the difference between catching a failing capacitor in March and discovering it on the first 95-degree afternoon of June. A thorough AC service in Marietta runs $80 – $200 and includes checking refrigerant pressures, testing capacitors and contactors, inspecting the condensate drain, and measuring airflow. Given Marietta’s humid subtropical summers, we also check for the telltale signs of an evaporator coil sweating into the supply plenum, a problem we see regularly in attic-installed horizontal units.
Tune-Up And Inspection
A tune-up on a Marietta home with an attic system should include checking for disconnected or undersized duct joints. In the 1960s ranch homes around Whitlock Avenue, ductwork often was sized for the original footprint, not the later addition. Our technicians measure static pressure rather than guessing, because a “correctly running” AC can still leave rooms clammy if the ductwork cannot move air.
Seasonal Readiness In Humid Conditions
Marietta’s high dew points from June through September mean your AC is doing two jobs: lowering temperature and removing moisture. A system that cycles off too quickly never pulls enough humidity out of the air. During AC service, we look at whether the system’s runtime matches the home’s actual cooling load, especially in early-2000s east-side homes where units were often sized by rule of thumb.
AC Unit Repair in Marietta
AC Unit Repair in Marietta covers the mechanical and electrical failures that stop a system from cooling: capacitors, contactors, fan motors, compressors, refrigerant leaks, and control boards. Repair costs in Marietta typically land between $150 – $650 depending on the part and the complexity of the diagnosis. A failed capacitor on a York condenser is a quick, lower-cost fix. A compressor replacement is at the top of that range and often prompts a conversation about whether AC Installation - Marietta or repair makes more sense for your home.
Capacitor And Contactor Failures
Capacitors are the most common AC part we replace in Marietta, and they fail more often in homes where the condenser sits in direct afternoon sun. A weak capacitor makes the compressor struggle to start, which shortens its life. Our technicians test capacitors under load, not just visually, and replace them with parts rated for high-heat environments.
Refrigerant Leaks And Recharges
A refrigerant recharge (topping off the cooling fluid your AC needs to run) only makes sense after the leak is found and repaired. We see leaks most often at the evaporator coil on older Trane and Lennox systems in Marietta, especially when the coil has been sweating through muggy nights for years. We find the leak, repair it properly, and then charge the system to the manufacturer’s spec, not a guess.
Trusted Brands We Service in Marietta
Our technicians are trained to service nine major residential HVAC brands, but in Marietta we most often work on Trane, Lennox, Goodman, and Rheem, including Marietta Carrier service when needed. Early-2000s east-side subdivisions skew heavily toward builder-grade Goodman and Rheem systems, while many 1980s and 1990s homes still run Lennox or Trane equipment. Because we service Marietta regularly, our trucks carry common capacitors, contactors, fan motors, and control boards that fit these systems. That local parts stock means a faster turnaround when your AC dies on a Saturday afternoon. If a part is not on the truck, our Atlanta parts network usually has it to you the same day.
See the difference
Before
After
Before
After
Before
AfterCommon AC Repair Problems We See in Marietta Homes
- Bonus rooms over garages that run 8 – 10 degrees warmer. Builders in early-2000s Marietta subdivisions often extended HVAC with flexible duct off the existing trunk instead of doing a proper load calculation. The result is a room that never cools right, no matter how long the system runs.
- Sweating evaporator coils and supply plenums. In attic-installed horizontal units, high attic heat plus Marietta’s summer humidity can cause condensation inside the plenum. That moisture rots duct board, breeds mold, and eventually drips through the ceiling.
- Skipped warranty registration on builder-installed systems. Many Marietta homeowners discover too late that their Carrier or Lennox parts warranty reverted from the 10-year registered coverage to the 5-year base because the registration was never filed within the first 60 days. We help you confirm your warranty status before any repair.
- Undersized returns in 1950s-70s ranch homes. A hallway-only return was standard practice in Marietta’s ranch construction era. Add a family room over the carport and the system starves for air, the evaporator coil freezes, and the compressor eventually fails.
Pricing for AC Repair in Marietta, GA
Marietta AC repair pricing follows a real range, not a mystery number revealed after the work begins. Here is what you can expect:
| Service | Typical Price Range in Marietta |
|---|---|
| AC Repair | $150 – $650 |
| AC Service | $80 – $200 |
| AC Unit Repair | $150 – $650 |
A capacitor replacement typically falls on the lower end of that range. A compressor or refrigerant leak repair lands higher. The single most important number is the one we hand you before work begins: a written price, fixed and itemized. Call (762) 240-5599 for a free estimate, and do not worry about pressure tactics. Our technicians are paid on the quality of their work, not on what they sell.
We Also Serve Cities Near Marietta
If you live just outside Marietta, we make the short drive to Smyrna, Kennesaw, Powder Springs, and Mableton with the same written-price guarantee and 365-day repair warranty. Whether you are off South Cobb Drive or near Kennesaw Mountain, you get a Marietta-level response time and a crew that knows the local housing stock. Check our AC Repair in Marietta page for coverage details in your neighborhood.
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.
FAQs About AC Repair in Marietta
The room over your garage is almost always the victim of an HVAC system that was never load-calculated for that space. Builders in Marietta’s early-2000s east-side subdivisions often ran flex duct off an existing trunk line, sized by rule of thumb instead of a Manual J load calculation. The result is a room that gets some air but never enough to overcome the garage heat below and the three exterior walls. The fix is usually not a bigger AC: it is addressing airflow with dedicated ducting, balancing dampers, or a small ductless unit for that room. Call (762) 240-5599 and we will measure the airflow and give you a straight answer.
Usually not. Sweating on the outside of the supply plenum in a Marietta attic is almost always an insulation or air-sealing problem, not a refrigerant charge issue. The cold supply air inside the duct cools the metal plenum, and warm, humid attic air condenses on it. A low refrigerant charge would more likely show up as a frozen evaporator coil or reduced cooling. We can test the charge, and if it is within spec, we will focus on insulating and sealing the plenum. Call (762) 240-5599 for an exact diagnosis.
It depends on whether the warranty was registered within the first 60 days after installation. In Marietta, many builder-installed systems were never registered by the original owner or the builder, so the parts warranty reverted from a 10-year registered term to a 5-year base term. If the coil fails in year two and the registration was skipped, you may be buying that coil out of pocket. We can check your registration status with the manufacturer before any repair begins. Call (762) 240-5599 and we will look it up.
Not necessarily. In Marietta’s older ranch homes, the more common cause is an undersized return or disconnected duct joints in the attic. A system can be correctly sized in tons but starve for airflow, which means it runs long without moving enough air across the coil to remove humidity. We measure static pressure and airflow to find the real bottleneck, because replacing a properly sized unit with a bigger one often makes the humidity worse. Call (762) 240-5599 for an airflow assessment.
Capacitor failure is the single most common AC repair we make in Marietta, and it is not a fluke. Heat shortens capacitor life, and Marietta’s annual tally of 90-degree-plus days means your condenser runs hard from May through September. Units sitting in direct afternoon sun off Dallas Highway or Roswell Road fail faster than shaded units. A $150 – $300 capacitor replacement is far cheaper than the compressor damage a weak capacitor can cause. Call (762) 240-5599 for an exact quote, and we will test the capacitor under load, not just eyeball it.
Written by Victor Mancini, Owner at Cold Harbour Heating and Air Marietta, serving Marietta since 2003.