AC Repair in

Alpharetta, GA

AC Repair in Alpharetta, GA | One Hour Heating & Air

Licensed under Georgia HVAC GAREGCN2011384, One Hour Heating & Air Conditioning of North Atlanta handles every kind of AC repair work in Alpharetta, from the simple diagnostic that finishes in 45 minutes to complex problems on aging systems that take a careful walkthrough. Our EPA 608 certified, NATE certified technicians are factory authorized on Daikin, Trane, Rheem, and Carrier, and we dispatch 24/7 from our Alpharetta office on Union Hill Rd, serving homes across Windward, Crooked Creek, Avalon, Webb Bridge, Halcyon, and the Old Milton Parkway corridor. Whatever your AC is doing, or refusing to do, we’ve seen it. Whatever the brand, age, or configuration, we have the parts on the truck for most repairs and the diagnostic experience to find the real problem when the obvious answer isn’t the right one.

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Georgia HVAC license GAREGCN2011384

EPA 608 certification PFWXHNZ4MT

NATE certification 1023518

Daikin

Trane

Rheem

Carrier

What We Repair on Residential AC Systems

A residential AC system has dozens of components that can fail, and the symptom a homeowner notices rarely points cleanly at the actual cause. Here’s the range of repairs we handle on Alpharetta calls:

Refrigerant problems. Low refrigerant from a leak, overcharge from a bad prior service, the wrong refrigerant in the system. We find the leak first, repair or replace the affected component, then recharge to the manufacturer’s spec on the unit itself, not by guess.
Frozen indoor coils. A coil that ices up usually means either low refrigerant, restricted airflow from a dirty filter or blocked return, or a stuck blower. We thaw the system, find the underlying cause, and fix the cause so it doesn’t freeze again next week.
Compressor problems. Hard start failures, compressor cycling, complete compressor failure. Sometimes a hard start kit is the fix. Sometimes the compressor is replaceable. Sometimes the system is old enough that replacement of the whole unit makes more sense than rebuilding the compressor.
Electrical component failures. Capacitors, contactors, relays, fan motors, and control boards. These are some of the most common AC repairs in any home, and we carry replacement parts on the truck for the brands we service most often in Alpharetta.
Refrigerant leaks. Indoor coil leaks, outdoor coil leaks, line set leaks, valve leaks. We use proper leak detection equipment, not guesswork. Once the leak is found, we repair or replace the affected part and recharge.
Drainage and condensate issues. Clogged drain lines, failed condensate pumps, tripped float switches, drain pan damage. Heavy pollen in spring and humid conditions in summer make drainage problems a regular Alpharetta call.
Airflow problems. Bad blower motors, failed blower wheels, dirty evaporator coils, restricted ductwork, return air problems. The symptom usually shows up as poor cooling, but the cause is in the airflow path.
Thermostat and control problems. Failed thermostats, miswired thermostats, smart thermostat compatibility issues, zone control board failures. A surprising number of “broken AC” calls turn out to be thermostat or wiring problems.
Sensors and safety switches. Pressure switches, high limit switches, freeze sensors, condensate float switches. These shut the system down when something else is wrong, and the fix usually involves diagnosing what triggered the safety, not just bypassing it.
Outdoor unit problems. Failed condenser fan motors, bent fins, damaged contactors, electrical issues at the disconnect. We diagnose at both the indoor and outdoor units because the problem can be at either end.
Ductwork issues. Disconnected ducts, crushed flex runs, leaky joints, undersized returns. We don’t always repair ductwork as part of an AC call, but when the duct system is clearly part of the problem, we’ll show you what we found.

If something is wrong with your AC and it’s not on this list, it’s probably some combination of these. The diagnostic is the same: figure out what the system is actually doing versus what it should be doing, find the gap, and fix the cause.

How We Diagnose AC Problems

The diagnostic process is the same on every call regardless of brand, age, or system type:

1. Listen to what the homeowner describes happening. The story is often more useful than the symptom.

2. Check the thermostat and zone controls. Verify what the system is being asked to do.

3. Check airflow at the equipment and at the rooms. Restricted airflow hides equipment problems.

4. Check refrigerant pressures against the manufacturer’s spec on the unit nameplate, not against a generic chart.

5. Check electrical components with a meter. Capacitors get tested against their rated value, not eyeballed.

6. Check the outdoor unit, the indoor unit, and the connections between them.

7. Walk through findings with the homeowner before any repair work starts.

8. Provide a written estimate. The homeowner approves or declines before any parts come off the truck.

The $89 service call covers the visit, the full diagnostic, and the written estimate. If you approve the repair, the $89 is applied to the repair cost.

AC Repair in Alpharetta, What’s Specific to This City

Beyond the general range of AC failures, Alpharetta’s housing pattern creates specific repair scenarios that come up more often here than elsewhere.

Alpharetta’s housing is dominated by 1990s and early 2000s master planned subdivisions. Windward, Crooked Creek, White Columns, and the Webb Bridge corridor all came online during that period, which means a big share of the homes we service in Alpharetta are now on their second AC system, or they’re still running the original one well past its expected life. Atlanta’s summer humidity, routinely above 70%, wears AC systems out faster than drier climates do. Around here, 10 to 15 years is a typical lifespan. Elsewhere in the country, the same system might run 15 to 20. The math catches up with Alpharetta’s housing stock all at once.

Two story homes are everywhere in these subdivisions, and most of them have the same problem: the upstairs runs hot. When the downstairs thermostat reads 72° and the upstairs bedrooms are sitting at 78° in July, that’s usually not a broken AC. It’s a duct problem the original builder shipped with the house, and it’s been there for 25 years. The cool air has a hard time getting back to the system from the second floor, so the upstairs never catches up. Sometimes the AC is fine and the fix is opening up the return air path. Sometimes the AC really is failing and the upstairs problem has been hiding how much it’s been struggling.

The third Alpharetta issue is the tree canopy. Avalon, the older sections of Windward, and the Old Milton Parkway corridor all sit under heavy oak and pine cover. February through May, pollen mixes with humidity in the drain pan under the AC and slowly clogs the drain line. When that line clogs, a safety switch shuts the whole AC down. Homeowners assume the system died. Most of the time the system is fine and the fix is a $89 service call and a drain flush.

Permits in Alpharetta run through the City of Alpharetta Community Development office at 2 Park Plaza, separate from unincorporated Fulton County. Straight repairs don’t need permits. Full system replacements and refrigerant work do, and we handle that paperwork as part of the job.

Problems We See More Often in Alpharetta Homes

These show up on more Alpharetta calls than they do in other parts of our service area:

Drain line clogs from spring pollen. Heavy oak and pine canopy in older Alpharetta neighborhoods drops fine pollen that mixes with humidity in the drain pan. The drain line slowly clogs, a safety switch trips, and the AC shuts down. Diagnosis is fast. The fix is usually a drain flush, sometimes with a small pump if the drain has a long horizontal run.
Worn out electrical parts on 1990s and 2000s equipment. Systems from this era are 20 to 30 years old now. Capacitor and contactor failures are some of the most common AC repairs we run in Alpharetta. The repair fixes the immediate problem, and on a system that age, we’ll also tell you what else is likely coming.
Refrigerant leaks on aging indoor coils. The indoor coil that absorbs heat from your house corrodes over time, especially sitting in a humid attic. R-410A refills run higher than they did five years ago because the supply has tightened. R-22 systems (anything roughly 2009 and older) are essentially unsupported now. When we find a leak on a system older than 12 years, the conversation shifts to repair versus replace.
Upstairs not cooling in two story homes. The return air problem in Windward and Crooked Creek subdivisions puts extra load on the blower motor. Motors that should last 15 years sometimes fail at 10 or 12 because they’ve been working harder than they should. We carry the common replacements on the truck.

What to Expect on the Day

A typical Alpharetta AC repair call runs about an hour to an hour and a half from arrival to finish. We text on the way with a photo of your technician. The diagnostic takes about 20 minutes. If parts are on the truck, the repair starts right after you approve the written estimate. If the part is not on the truck, we’ll tell you the expected timeline before we leave, and most parts are available same day or next morning from local supply.

You don’t need to do anything before we arrive. If the system has shut down completely, leaving the thermostat off is fine. If the system is running but not cooling, leaving it running helps us see what it’s doing.

Cost Considerations for Alpharetta Homeowners

The $89 service call and diagnostic is waived when you proceed with the repair, and it’s free for Comfort Club members.

Most Alpharetta AC repairs land in the $228 to $1,200 range. Electrical component swaps are at the low end. Blower motor replacements, condensate pump installs with rework, and refrigerant recharges on systems still under warranty land in the middle. Indoor coil replacements, refrigerant work on out of warranty systems, and compressor repairs push toward the high end. The full range for AC repair runs $228 to $3,000+ depending on what failed.

Two things specific to Alpharetta drive cost up. First, homes in master planned subdivisions with strict HOAs (Avalon and the gated sections of Windward in particular) sometimes require specific outdoor unit placement or screening that adds installation work on replacement jobs. We flag this during the estimate. [VERIFY: specific HOA approval requirements for outdoor unit placement in Avalon and Windward gated sections.] Second, two story homes with the upstairs cooling problem sometimes benefit from opening up the return air path alongside the repair, which is honest work that pays back in better comfort and less wear on the equipment you already have.

When the repair bill crosses roughly 50% of what a new system would cost on a system older than 12 years, we’ll lay out the math both ways before you decide. Replacement runs $2,500 to $8,000+ for AC alone, with financing as low as $109/month. A complete HVAC system (AC plus furnace or full heat pump conversion) runs $7,000 to $25,000+ on Alpharetta homes, with the larger 4,000+ square foot Windward and Crooked Creek homes landing closer to the high end because they often need multiple zones and longer duct runs.

Comfort Club at $177/year covers an annual AC tune up, an annual furnace tune up, priority scheduling during peak season, and 15% off any repair. For Alpharetta homeowners with systems in the 10 to 15 year window, the priority scheduling alone is worth it when the system fails on a 95° afternoon and we’re already booked solid for the day.

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Recent Work Near Alpharetta

Crooked Creek, 1996 build, original Carrier system tripped on a 94° Saturday in July, diagnosed as failed dual run capacitor and contactor pitted from age, replaced both on the truck, system back online in 45 minutes, recommended full system replacement quote provided for the homeowner’s planning.

Windward two story, homeowner reported upstairs won’t cool, diagnostic showed the system was performing within spec on refrigerant and airflow at the unit itself, root cause was a collapsed return duct on the second floor restricting airflow, repair was duct rework rather than equipment replacement.

Avalon townhome corridor, pollen clogged drain line tripped the safety switch during a heavy oak pollen week in April, drain flush and inline pump install, $310 total.

Neighborhoods in Alpharetta

Avalon and Old Milton Parkway corridor. Mature oak and pine canopy makes pollen related drain clogs the most common spring AC repair call from this area

Crooked Creek. Same era as Windward, similar two story housing stock. We see a lot of first time replacement activity here as the original systems hit their expiration date.

Windward. Large 1990s master planned community, mostly two story homes with attic ductwork and multiple zones common. Original AC systems are now at the end of their lives, and our most common Windward call is upstairs won’t cool, which is sometimes a return air issue and sometimes genuine equipment failure.

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FAQs About AC Repair in Alpharetta

My AC is from the original 1990s Windward build. Is it worth repairing or should I replace?

The honest answer depends on what failed and what else is showing wear. A capacitor swap on a 30 year old system buys you time but doesn’t change the math. If the repair quote crosses 50% of replacement cost, or if the system uses R-22 refrigerant (phased out, expensive to recharge), replacement is usually the better call. We give you the numbers both ways before you decide.

Do I need a permit to repair my AC in Alpharetta?

Repairs to existing equipment don’t need a permit. Full system replacements, refrigerant work, and electrical changes do require permits through the City of Alpharetta Community Development office at 2 Park Plaza. We handle that paperwork when the job calls for it.

Why does my upstairs stay 6 degrees warmer than downstairs in my two story Windward home?

That’s almost always a return air or duct design issue, not an equipment problem. A lot of 1990s two story homes in Alpharetta were built with a single return air path that’s undersized for what the second floor needs in summer. Opening that path up or adding a zone system often fixes it without replacing the AC.

My AC ices up every few weeks. What’s causing it?

A frozen indoor coil almost always means one of three things: low refrigerant from a leak, restricted airflow from a dirty filter or blocked return, or a stuck blower motor. We thaw the system, find the underlying cause, and fix the cause. Just refilling the refrigerant without finding the leak means you’ll be calling us back in a month.

My drain line clogs every spring. Is this an Alpharetta thing?

It is. Heavy oak and pine canopy in older Alpharetta neighborhoods drops fine pollen that mixes with humidity in the drain pan and slowly clogs the line. A drain flush each spring during your AC tune up usually prevents it. Comfort Club members get this as part of their annual tune up at no extra charge.

How fast can you get to me if my AC fails on a 95° day in July?

We dispatch 24/7 from Alpharetta. Comfort Club members get priority scheduling during peak demand. Non members are served in order, and during heat waves we sometimes book out 24 to 48 hours. The Always On Time guarantee still applies to your scheduled appointment.

Are there Georgia rebates that affect AC repair?

Rebates apply to replacements, not repairs. If your repair leads to a replacement conversation, Georgia Power’s HEIP program offers up to $1,250 in rebates for home comfort bundles (insulation, duct sealing, air sealing) and $75 for a smart thermostat upgrade. GEFA’s Home Energy Rebates can cover up to $16,000 depending on household income and energy reduction. The federal Section 25C heat pump tax credit expired December 31, 2025, so 2026 installs no longer qualify for that one.