Every AC repair Fairfax VA call includes a full diagnostic, a flat-rate quote, the repair itself, and a post-repair performance test. We check the whole system, not just the failed part, because a weak capacitor today often means a weak contactor next month. Here's what's covered.
We read suction and head pressures with a manifold gauge set, check compressor and blower amp draw with a clamp meter, and measure supply-versus-return air temperature with a psychrometer. You get the readings and what they mean. Most diagnostics take 30 to 45 minutes.
Before we touch anything, you get a written price for the repair. No hourly rate, no surprise line items. If the fix is a $180 capacitor, that's the number. If it's a $1,200 compressor, you'll see that too and we'll talk through repair versus replace.
Capacitors, contactors, relays, transformers, and circuit boards are the most common failures we see. We stock the top 12 failure parts on every truck, so most electrical repairs finish in one visit. We test the new part under load before we button up the panel.
If your system is low on R-410A or R-32, we find the leak with an electronic detector, repair the joint or component, pull a vacuum to 500 microns, and recharge to the manufacturer's weight. We don't just top it off and hope. A proper leak repair holds for years.
A clogged PVC condensate line is the number one cause of water damage we see in Fairfax attics. We clear the line, flush the trap, and check the float switch. If the line is undersized or improperly pitched, we'll tell you and quote a fix.
After the repair, we run the system for 15 to 20 minutes and verify supply air is 18 to 22 degrees cooler than return air. We check amp draw on the new part and confirm pressures are in spec. You get the numbers on your invoice, plus a 1-year workmanship warranty.
AC repair Fairfax VA is the diagnostic and mechanical work that restores cooling to a system that has stopped performing: a compressor that won't start, a blower motor that's seized, a refrigerant leak that's slowly drained the charge, or a thermostat that's calling for cool but getting nothing. Our techs start with a manifold gauge set and clamp meter, check pressures and amp draw against the manufacturer's spec, then trace the fault to the failed part. We carry R-410A and R-32 refrigerant, capacitors, contactors, and blower motors on the truck so most repairs finish in one visit.
Fairfax summers push equipment hard. Attic air handlers routinely see 130-degree plenum temps, and a dirty air filter can freeze an evaporator coil in under a week. We see it constantly in Fairfax County: a system that ran fine in May starts short-cycling by July. If your AC not cooling repair Fairfax VA call comes in during a heat wave, we prioritize no-cool emergencies and bring a portable gauge set and recovery machine so we can diagnose and repair without a second trip.
No mystery, no runaround. Here's exactly how an AC repair call works from the moment you dial our number to the moment cool air is back in your Fairfax home.
Schedule
Call or book online — a real human picks up and confirms a 2-hour arrival window.
Diagnose
Licensed tech inspects on-site, then walks you through the cause and your options.
Fix
The job is completed to code and done right the first time — no shortcuts, no surprises.
Guarantee
Every job backed by a written workmanship warranty — and we stand behind it.
Manifold gauge set
Reads suction and head pressure on the refrigerant circuit. We compare readings to the manufacturer's temperature-pressure chart to confirm charge level and spot restrictions.
Clamp meter
Measures amp draw on compressors, blower motors, and fan motors. A compressor pulling 28 amps on a 20-amp circuit tells us it's failing before it grounds out completely.
Vacuum pump and recovery machine
Used on any job that opens the refrigerant circuit. We recover existing refrigerant, pull a vacuum to 500 microns, and recharge to factory weight. Required by EPA Section 608.
Multimeter
Tests capacitors, contactors, transformers, and circuit boards. A bulged capacitor reads low microfarads, which explains a compressor that hums but won't start.
Psychrometer
Measures return and supply air temperature and humidity. We use it to confirm the system is actually cooling after a repair, not just running.
Electronic leak detector
Finds refrigerant leaks at brazed joints, Schrader valves, and coil bends. Far more accurate than soap bubbles for slow leaks that drain a system over months.
Flaring tool and tube cutter
Used when we replace a section of copper tubing or repair a line set. Clean, square cuts and proper flares prevent the exact leaks we're called out to fix.
ACCA quality standards
We follow ACCA guidelines for load calculation and system performance testing. On repairs, that means verifying the fix restores the system to its rated capacity, not just that the part is new. We measure before and after.
EPA Section 608 refrigerant handling
Every tech who touches refrigerant holds EPA Section 608 certification. We recover, recycle, and recharge by weight. No venting, no guessing at charge level. This is federal law and we follow it on every job.
NATE-certified diagnostics
Our technicians hold NATE certification, which means they've passed industry-standard tests on electrical, refrigerant, and airflow diagnostics. That training shows up in how fast we find the fault and how often the first repair is the right one.
AHRI-matched components
When we replace a compressor, coil, or motor, we match it to the existing system using AHRI certification data. Mismatched components kill efficiency and shorten equipment life. We check the match before we order the part.
01
What we do: We run emergency AC repair Fairfax VA 24/7. Call us and a live dispatcher gets a tech headed your way with a fully stocked van. We diagnose, quote a flat rate, and fix it. Most Saturday no-cool calls are resolved the same day.
→ Cool air back in your Fairfax home within hours, not days. You pay the quoted flat rate, no weekend surcharge.
02
What we do: That pattern usually means low refrigerant or a dirty condenser coil. We check pressures with a manifold gauge set, clean the coil, and look for leaks. If the charge is low, we find and repair the leak, then recharge to manufacturer weight.
→ Supply air drops back to 18 to 22 degrees below return, run times shorten, and your next electric bill reflects it.
03
What we do: We do a full diagnostic, document the readings, and repair what's needed to get the system performing to spec. You get a written invoice with before-and-after numbers the buyer's agent can hand to the closing table.
→ The inspection objection clears, and the sale moves forward without a price renegotiation over the AC.
04
What we do: A heat pump stuck in defrost mode or a failed reversing valve will do exactly that. We diagnose the defrost board and reversing valve, repair or replace the failed part, and verify the system switches between heating and cooling modes correctly.
→ Heat comes back on, the auxiliary strips stop running constantly, and your winter electric bill drops back to normal.
Fairfax sits in a humid subtropical pocket of Northern Virginia, which means long cooling seasons and heavy run times. July and August routinely push 95 degrees with dew points in the low 70s, and that combination wrings every bit of capacity out of a residential system. Most Fairfax homes were built between 1960 and 2010, so we see everything from original 1960s ramblers with undersized returns to 2000s townhomes with attic air handlers that bake at 130 degrees. The attic installs are the ones that fail first: capacitors dry out, contactors pit, and condensate lines clog with biological growth. Fairfax County follows the Virginia Uniform Statewide Building Code, and we pull permits for replacements and run condensate lines to code. If you're searching air conditioning repair in Fairfax, Virginia, expect us to check the whole system, not just the part that failed. A weak capacitor today is often a weak contactor next month, and we'd rather tell you now than see you again in three weeks. We also see a lot of heat pumps in Fairfax Station and Clifton, where propane and oil are less common. Those systems need defrost board checks in winter and reversing valve tests year-round.
Old Town Fairfax
Older homes with original ductwork and window units converted to central air. Undersized returns are common, which stresses blowers and freezes coils.
Fair Lakes
1990s and 2000s construction with attic air handlers. These units run hot, and capacitors and contactors fail earlier than in basement installs.
Kings Park West
Mostly 1970s split systems with original copper line sets. We see slow refrigerant leaks at brazed joints and Schrader valves in this area.
Mantua
Mix of older ramblers and newer rebuilds. Ductwork varies widely, so we check static pressure before quoting any airflow-related repair.
Fairfax Station
Larger lots and longer line sets, often with heat pumps. Defrost board failures and reversing valve issues show up here more than anywhere else we serve.
High humidity and 95-degree summer peaks
Systems run longer and hotter, which shortens capacitor and contactor life. We see a spike in no-cool calls from late June through August, and we staff for it.
Attic air handlers hitting 130-degree plenum temps
Heat accelerates electrical component failure. Capacitors in attic units often fail two to three years sooner than identical parts in basement or garage installs.
Older housing stock with undersized return ducts
Restricted return air causes low airflow, frozen evaporator coils, and premature blower motor failure. We check static pressure on every diagnostic to catch it.
Fairfax County code requirements on condensate and permits
Replacements need a permit, and condensate lines must be properly pitched and trapped. We handle the paperwork and run lines to code so inspections pass the first time.
Fairfax summers are brutal on cooling equipment. These are the calls we run most often, and what happens if you let them slide.
Problem
A system blowing warm air usually means low refrigerant, a failed capacitor, or a frozen coil. Run it like that for a week and you risk cooking the compressor, turning a $300 repair into a $1,800 replacement.
Our Fix
We diagnose with gauges and a clamp meter, find the actual fault, and fix it. If it's a capacitor, you're back to cool in under an hour. If it's a leak, we repair the joint, pull a vacuum, and recharge with R-410A or R-32 to spec.
Problem
Short cycling means the system starts and stops every few minutes, which spikes your electric bill and wears out the compressor. A tripped breaker points to a grounded compressor or a failing blower motor. Ignore it and you'll be buying a new system.
Our Fix
We check amp draw on the compressor and blower against nameplate ratings. If the compressor is grounded, we show you the ohm readings and quote a replacement. If it's a failing run capacitor, we swap it and verify the fix under load.
Problem
A clogged PVC condensate line backs up and overflows, staining ceilings and soaking insulation. In Fairfax attics, that water can reach drywall within hours. Mold follows within 48 hours if the area stays damp.
Our Fix
We clear the condensate line, flush the trap, and test the float switch. If the line is undersized or pitched wrong, we quote a code-correct fix. We also check the evaporator coil for ice, which often causes the overflow in the first place.
Problem
Grinding usually means a failing blower motor or compressor bearing. Squealing points to a worn fan motor or belt. These noises mean a part is about to fail completely, and when it does, you're without cooling until it's replaced.
Our Fix
We isolate the noise source, check motor bearings and amp draw, and replace the failing component. We stock common blower motors and fan motors on the truck, so most of these repairs finish the same day. We test the new motor under load before we leave.
We've been repairing cooling systems in Fairfax since 2004, and the calls haven't changed much: no cool air, weird noises, water on the floor. What's changed is how fast we can fix them. Here's what you get when you book AC repair near me Fairfax Virginia with our team.
Same-day no-cool service
Call before noon and we'll have a NATE-certified tech at your door the same day in most of Fairfax County. We stock capacitors, contactors, and blower motors on every truck, so roughly 8 out of 10 no-cool calls are fixed in a single visit. If we need a part we don't carry, you'll know the price and timeline before we leave.
Flat-rate pricing upfront
You get a written flat-rate price before we touch a screwdriver. No hourly meter running while we think. Diagnostic fee is waived when you approve the repair. Typical 2026 AC repair Fairfax VA jobs run $180 to $450 for common electrical faults and $600 to $1,400 when a compressor or coil is involved.
All major brands serviced
We repair Carrier, Trane, Lennox, Goodman, Rheem, York, Mitsubishi Electric, Daikin, Bryant, and American Standard systems. Our techs carry brand-specific fault codes and wiring diagrams on tablets, which cuts diagnostic time. Whether it's a 2005 Goodman or a 2022 Daikin inverter, we've worked on the exact model before.
22 years in Fairfax
We've been fixing AC systems in Fairfax since 2004. That's 22 years of Virginia summers, code changes, and equipment generations. We know which neighborhoods have undersized returns, which builders ran cheap copper, and how Fairfax County inspectors want condensate lines run. That local knowledge saves you time and repeat visits.
Google ★★★★★4.9
Called about a no-cool issue in Fair Lakes and they had a tech out the same afternoon. He found a bad capacitor, showed me the reading, and had it replaced in 30 minutes. Flat rate was $240, exactly what he quoted. No upsell, no pressure. I've already recommended them to two neighbors.
Yelp ★★★★★4.8
We had a refrigerant leak that two other companies couldn't find. The tech here used an electronic detector and found it at a brazed joint in under 20 minutes. Repaired it, pulled a vacuum, and recharged. That was three months ago and the system is still holding pressure. Honest work.
BBB ★★★★★4.9
Emergency call at 10 p.m. in Burke with a newborn in the house. They answered, dispatched a tech, and had the blower motor replaced by 11:30. Flat-rate price, no overtime charge. That kind of response is rare. We've used them for maintenance ever since.
Google ★★★★★5.0
Fairfax HVAC Experts replaced our 18-year-old Carrier compressor when two other companies said we needed a whole new system. They showed us the ohm readings and explained why a compressor swap made sense. Saved us about $4,000. System has run two full summers without a hiccup.
Fairfax HVAC Experts has been repairing air conditioners in Fairfax since 2004. That's 22 years of Virginia heat, humidity, and equipment failures. Our technicians hold NATE certification and EPA Section 608 certification for refrigerant handling, and we work under a Virginia HVAC license. We've repaired thousands of systems across Fairfax County, from single-stage builders' units to multi-zone ductless mini-splits. We follow ACCA quality standards on every install and repair, and we keep our tools calibrated so the readings we give you are accurate. When we say your compressor is pulling 28 amps on a 20-amp circuit, that's a real number from a real meter.
Real experiences from customers who chose our AC Repair services.
“Our AC quit on a Saturday in July. Fairfax HVAC Experts had a tech out by 2 p.m. He found a failed capacitor, showed me the bulged top, and had a new one in 20 minutes. Total was $240. I've used two other companies in Falls Church and neither was this straight with me. Cool air by 3 p.m. on a 97-degree day.”
Dave R.
Homeowner, Falls Church
“We had a refrigerant leak that two other companies missed. The tech here used a manifold gauge set and an electronic leak detector and found it at a brazed joint in the line set. He repaired the joint, pulled a vacuum, and recharged with R-410A. That was in June and the system is still holding. Fairfax County needs more techs like this.”
Priya M.
Homeowner, Vienna
“Called at 9 p.m. when our AC stopped cooling and the house hit 84 degrees. They answered, dispatched a tech, and he replaced a blower motor by 11:30 p.m. Flat-rate quote before he started, no overtime charge. I've got a newborn and that mattered. Burke homeowners, save this number.”
Tom K.
Homeowner, Burke
Real answers to the questions we hear most often from local homeowners and property managers.
When your AC dies at 10 p.m. in July, our emergency line is open. We run 24/7 no-cool calls across Fairfax and carry the parts to fix most failures on the spot. Same flat-rate pricing, no after-hours surcharge surprises.
View Emergency HVAC RepairIf your system is 15 years old and facing a $1,400 compressor replacement, a new install may cost less over five years. We size units with a Manual J load calculation and pull the Fairfax County permit. AHRI-matched equipment, code-correct line sets.
View AC InstallationFull system replacement for Fairfax homes where repair no longer makes sense. We haul away the old condenser and coil, install new R-410A or R-32 equipment, and verify the charge with manifold gauges before we leave. Most replacements finish in one day.
View AC ReplacementMany Fairfax homes run a split system: same air handler, separate furnace. When heating season hits, we repair igniters, flame sensors, and inducer motors. If your AC and furnace share a blower, we check both while we're there.
View Furnace RepairNew furnace installs for Fairfax homeowners, sized to match your existing ductwork and AC coil. We handle the Virginia HVAC permit, gas line connection, and combustion testing. Most installs take one day, and we haul away the old unit.
View Furnace InstallationHeat pumps handle both heating and cooling, so a failure hits twice as hard. We diagnose reversing valves, defrost boards, and auxiliary heat strips. Common Fairfax issue: a heat pump stuck in defrost mode, blowing cold air in January.
View Heat Pump RepairReach us at +1 (571) 760-4715 any time, day or night. Our office is open Monday through Friday from 8 a.m. to 6 p.m., and emergency dispatch runs 24/7. Most calls placed before noon get a same-day visit.
Phone
+15717604715Address
14500 Chronical Dr, Fairfax, VA 22030
Hours
Mon–Fri: 7AM – 7PM
Sat: 8AM – 4PM
Sun: Emergency Only
24/7 Emergency Available
