When the air conditioning quits in McLean, VA, the house tells you fast, and so does everyone in it. The most common failure we see is the humble run capacitor: a few dollars of electronics that starts the compressor and fan, weakens quietly for years, and finally lets go on a brutal afternoon, leaving the outdoor unit humming but the fan still. Right behind it come pitted contactors that no longer pass power cleanly, condenser fan motors with dry bearings, refrigerant leaks that slowly bleed the system's capacity away, and evaporator coils that freeze into a block of ice whenever airflow collapses behind a clogged filter.
At McLean HVAC, each cooling call starts with measurement. Capacitors are metered against the rating on the label. Amp draws on the compressor and fan motor are compared to the data plate. Refrigerant charge is judged by superheat and subcooling, not by pressure readings alone, and any icing prompts a look at the evaporator coil, blower wheel, and filter. This matters because a single warm-air symptom can hide four different faults at four very different prices, and a refrigerant top-off that ignores the leak is just a short-term rental on cold air.
We service every common residential cooling system from all major brands, and our trucks stock the summer failure parts: capacitors, contactors, fan motors, hard-start kits, and condensate pumps, so most repairs are finished the same visit. When a compressor has truly failed on an aging system, we say so plainly and lay out the repair-versus-replace math honestly. For fast AC repair anywhere in McLean, call (571) 741-3123 and an experienced technician will be on the way.
When the heat goes out, see Furnace Repair in McLean.
How Much Does AC Repair Cost in McLean?
The typical AC repair in McLean costs $150 to $650. The part that failed drives the price: a capacitor is a quick, inexpensive fix, while a coil or compressor is a major repair. Every repair starts with a diagnosis and a clear, upfront price.
| Repair | Typical cost | What it usually means |
|---|---|---|
| Capacitor replacementThe most common AC failure; outdoor unit hums but won't start | $150–$400 | The most common AC failure; outdoor unit hums but won't start |
| Contactor replacementWorn relay that stops the condenser from starting | $150–$350 | Worn relay that stops the condenser from starting |
| Condenser fan motorOutdoor fan stops, compressor trips on high heat | $300–$700 | Fan won't spin, unit overheats and shuts down |
| Refrigerant leak repair + rechargeDepends on leak location and refrigerant type | $300–$1,500 | Varies with where the leak is and how much charge is lost |
| Evaporator coil replacementCorroded or leaking indoor coil | $1,000–$2,500 | Major repair; worth weighing against replacement on older systems |
| Compressor replacementLargest single repair; often weighed against a new system | $1,500–$3,000 | Largest single repair; often weighed against a new system |
These are common price ranges, not quotes. We confirm the exact price after diagnosing your system.
What Moves the Cost Up or Down
- The age of the system and whether parts are still readily available
- Refrigerant type, because R-22 recharges are much more expensive
- Timing, such as same-day or after-hours service versus a scheduled visit
- Access to the equipment, like rooftop units or tight attic air handlers
If a repair would cost more than a third of a new system, or your AC is past 12 to 15 years old, we'll show you both numbers side by side so you can decide. Call (571) 741-3123 for a quote.
Signs You Need AC Repair in McLean
Catching these issues early helps you avoid costly problems and protect your property. Here are the most common indicators that it's time to call a professional:
- Breaker trips or a burning odor at startup
- Warm or room-temperature air blowing when the thermostat calls for cooling
- Hissing or bubbling sounds that suggest a refrigerant leak
- Water dripping from the indoor unit or showing up on the ceiling below
- Frost or ice forming on the copper lines or the indoor coil
- Cooling bills climbing while the house stays sticky and warm
- A condenser fan that sits still while the outdoor unit hums
- An AC that turns on and off every few minutes but never cools down the house
Don't Wait for a Total Failure
A failing capacitor, clogged condensate drain, or dirty flame sensor rarely fixes itself and usually gets more expensive to address the longer it runs. Call McLean HVAC at (571) 741-3123 at the first sign of trouble.
Your AC Repair Questions Answered
Why Hire a Professional for AC Repair?
An air conditioner puts several hazards into one cabinet. The capacitor can deliver a painful shock long after the breaker is off, the condensing unit is wired for 240 volts, and the refrigerant circuit is a sealed, pressurized loop that federal rules forbid venting. Servicing it properly takes gauges, a recovery machine, and a vacuum pump, not a DIY recharge can. Diagnosis has its own traps. A frozen coil is as likely to be an airflow issue as a charge issue, and recharging a system that still leaks throws money away while moisture and acid work on the compressor.
A professional repair looks at the whole system, not just the symptom. Our technicians meter electrical parts before replacing them, make charge decisions from measured superheat and subcooling, locate leaks with electronic detectors and dye, and check the filter, blower, and static pressure any time airflow could be the issue. The result is a repair that lasts the season instead of a guess that fails in three weeks. If your system is not worth saving, you will hear it from us directly, backed by numbers rather than a sales pitch.
What to Expect From Our AC Repair
Every visit follows a step-by-step method refined over years of hands-on experience. Here's a look at each step our McLean HVAC team takes:
Testing First
Before we replace anything, we meter the electrical components, read the refrigerant charge with superheat and subcooling, and look over the coil, filter, and condensate line for the actual cause.
Findings & Firm Quote
We show you what failed and why, then give a firm price before any work begins. If the compressor or coil points toward replacement instead, we lay out the honest math.
Repair From a Stocked Truck
Since the common summer failures, like capacitors, contactors, and fan motors, are stocked on the truck, most AC repairs are wrapped up during the first visit.
Test Under Load
Before we leave, we measure the temperature split, recheck amp draws and refrigerant charge, flush the condensate line, and run the system through a complete cooling cycle.
Want a Professional Opinion?
Call McLean HVAC to discuss your AC repair needs with an experienced technician.
Get Help: (571) 741-3123How to Prevent AC Repair Problems
A few simple habits now, like regular filter changes and seasonal tune-ups, can add years to your system's life. Put these technician-approved steps to work around your property:
- Schedule a spring tune-up so weak parts are caught before summer arrives
- Keep shrubs two feet from the outdoor unit and gently rinse its coil each spring
- Keep supply and return vents open; closing rooms raises static pressure on the blower
- Clear the condensate drain when you first turn on the AC each year
- A new buzz or click at startup often means a weak capacitor, so call before it fails
- Swap filters monthly while the AC is running hard to keep the evaporator coil from icing
- Never enclose the condenser; it needs open space on every side to shed heat
DIY vs. Professional AC Repair
While some minor tasks like changing filters or checking a thermostat can be handled by homeowners, most HVAC work involves refrigerant, gas combustion, and high-voltage electricity, jobs that call for professional expertise. Here's a comparison:
| Factor | DIY Attempt | Professional Service |
|---|---|---|
| Refrigerant | Top-offs without finding the leak | Leak found and fixed, then charge weighed in |
| Shock Risk | Live 240V wiring and a charged capacitor | Power verified off, capacitors discharged |
| Iced Coils | Defrost it and hope for the best | Airflow or charge problem identified and fixed |
| Diagnosis | Picking a likely part and hoping | Instrument readings, not hunches |
| Parts | Close-enough capacitors and motors | Specs matched to the equipment data plate |
| Outcome | Cold air until the next heat wave | Tested and confirmed under load |
Schedule Your AC Repair Service
Don't let a failing system get worse. Call McLean HVAC now for prompt, professional service.
Call (571) 741-3123 NowAreas We Serve for AC Repair
We bring AC repair to homes and businesses in town and across the nearby communities. Pick your area to see local details.