Full System Diagnosis
Electrical testing with a multimeter and clamp meter, refrigerant pressure check on a manifold gauge set, coil and blower inspection, and condensate drain verification. We find the fault, not just the symptom.
Licensed
Licensed & Bonded
Fully Insured
Insured & Bonded
24/7 Emergency
Same-Day Response
Warranty Backed
Workmanship Guaranteed in McLean
What Our Ductless Mini-Split Repair Covers
Every repair visit includes a full diagnostic, a flat-rate quote before work starts, and a test of the system in both heat and cool mode. We carry the parts that fail most often, so most McLean repairs finish in one trip. If a part has to be ordered, we tell you the lead time upfront.
Refrigerant Leak Repair
Electronic leak detection, nitrogen pressure testing, joint or flare repair, vacuum pump evacuation, and recharge to the manufacturer's spec in ounces. We fix the leak instead of just topping off the charge.
Electrical Component Replacement
Capacitors, contactors, control boards, thermostats, blower motors, and fan motors. We stock the common failures for Mitsubishi Electric, Daikin, Carrier, and Trane heads.
Coil and Drain Service
Coil cleaning with a coil cleaning pump and fin comb, condensate drain line clearing, and pan flush. Dirty coils and clogged drains cause most of the no-cool and water-leak calls we run.
Heat and Cool Cycle Test
After the repair, we run the unit through a full heat and cool cycle and verify supply air temperature at the head. You see the system working before we leave.
Ductless Mini-Split Heat Pump Repair in McLean
Ductless Mini-Split Heat Pump Repair in McLean covers the full diagnostic and repair cycle for wall-mounted and ceiling-cassette systems: refrigerant charge verification with a manifold gauge set, control board and capacitor testing with a multimeter, condensate drain clearing, and reversing valve diagnostics. These systems move heat with R-410A or R-32 refrigerant and a reversing valve, so a single failed component can kill both heating and cooling. We test each circuit before we quote parts.
Most McLean calls we run come from older Chesterbrook and Franklin Park homes where a mini-split has run eight to twelve years without a deep clean. Coils pack with pollen, blower motors drag, and capacitors fail on the first cold snap. If you are searching for ductless mini-split not working McLean, the cause is usually one of five faults: refrigerant leak, failed capacitor, stuck reversing valve, clogged drain line, or a control board that lost communication with the thermostat.
What to Expect on a Repair Call
Every ductless mini-split repair in McLean follows the same five steps. You will know what we found, what it costs, and how long the fix takes before we start turning wrenches.
01
Schedule
Call or book online — a real human picks up and confirms a 2-hour arrival window.
02
Diagnose
Licensed tech inspects on-site, then walks you through the cause and your options.
03
Fix
The job is completed to code and done right the first time — no shortcuts, no surprises.
04
Guarantee
Every job backed by a written workmanship warranty — and we stand behind it.
Tools and Methods We Use on Every Repair
Tools & Equipment
Manifold gauge set
Reads high and low side refrigerant pressures so we can confirm charge, superheat, and subcooling before and after a repair.
Vacuum pump
Pulls a deep vacuum on the line set after any leak repair or component swap, which removes moisture before we recharge.
Electronic leak detector
Sniffs out refrigerant leaks at flare joints, brazed connections, and coil tubing that pressure testing alone can miss.
Multimeter and clamp meter
Tests capacitors, contactors, control boards, and compressor amp draw. Amp readings tell us whether a motor or compressor is failing.
Coil cleaning pump and fin comb
Cleans packed coils and straightens bent fins, which restores airflow and efficiency on units that have run years without service.
Refrigerant recovery machine
Recovers refrigerant to EPA Section 608 standards before any repair that opens the sealed system.
Duct pressure gauge
Measures static pressure and airflow so we can confirm the head is delivering the rated CFM after a repair.
Methods & Standards
EPA Section 608 refrigerant handling
Every refrigerant recovery, recharge, and leak repair follows EPA Section 608 rules. We recover, weigh in the charge to the manufacturer's spec, and document the amount added.
NATE-certified diagnostics
Our technicians hold NATE certification, which means they are tested on the electrical and refrigerant diagnostics that ductless systems require. We follow a fixed diagnostic sequence on every call.
AHRI-certified charging
We charge systems to AHRI-certified specs for the specific model, not by guesswork. That protects efficiency ratings and keeps the compressor within its design envelope.
Nitrogen pressure testing
Before we recharge a system with a suspected leak, we pressurize the line set with dry nitrogen and watch the gauge. It confirms the repair held before we put refrigerant back in.
When McLean Homeowners Call Us for Mini-Split Repair
01
A homeowner in Country Club Hills has a Mitsubishi head that stopped cooling in July, and the room is now 88 degrees.
What we do: We run a same-day diagnostic, find a slow refrigerant leak at a flare joint, repair it, pull a vacuum with a vacuum pump, and recharge to spec.
→ Cold air restored the same afternoon, with pressure readings documented before and after the repair.
02
A family in Salona Village wakes up to water dripping from a ceiling cassette onto the hardwood floor.
What we do: We clear the clogged condensate drain line, flush the pan, check the float switch, and clean the coil while we are in the unit.
→ No more drips, and the head runs quieter with better airflow after the coil cleaning.
03
A home office in West McLean loses heat on a 22-degree January morning, and the mini-split is blowing cold air.
What we do: We diagnose a stuck reversing valve, replace it, and verify the defrost cycle and refrigerant charge before we leave.
→ Heat restored in about three hours, with the system tested through a full heat cycle at the head.
04
A landlord in Broyhill Crest has a multi-zone system where one head works and another does not.
What we do: We test the control board, low-voltage wiring, and thermostat communication on the dead zone, then replace the failed board.
→ Both zones running again, with the repair logged under warranty for the next tenant turnover.
How Ductless Mini-Split Repair Runs in McLean
McLean sits in a humid, four-season climate, and that shapes what fails on a ductless system. Summer humidity packs coils and feeds algae in condensate drain lines, which is why water-leak calls spike in July and August. Winter cold snaps push heat pumps into long defrost cycles, and that is when reversing valve and defrost control board faults show up. The housing stock matters too: older Chesterbrook and Franklin Park homes often have mini-splits added to additions and sunrooms, sometimes on undersized circuits. We check the electrical supply, not just the unit. Fairfax County permits apply to new installs and some replacements, and we pull them when a job requires it. If you need ductless mini-split repair McLean VA near me on a holiday weekend, call (571) 760-4593. We run emergency windows because a dead mini-split in a home office or a nursery is not something you wait three days to fix.
Neighborhoods We Serve
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Chesterbrook
Many homes here have mini-splits added to finished basements and additions. We often find undersized circuits and older flare joints that leak.
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Langley Forest
Larger homes with multi-zone systems. When one zone fails, it is usually a control board or communication fault, not a refrigerant issue.
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Franklin Park
Older housing stock where ductless heads have run 10-plus years. Coil cleaning and capacitor replacement are the most common calls.
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West McLean
Home offices and sunrooms rely on single-zone heads. A no-heat call here is urgent, so we prioritize same-day windows.
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Salona Village
Ceiling cassettes are common, and clogged condensate drain lines cause most of the water-leak calls we run here.
Local Conditions We Plan For
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Humid summers packing coils and drain lines
Algae and biofilm clog condensate lines, causing water leaks. We flush drains and clean coils on every summer repair call.
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Cold snaps driving long defrost cycles
Extended defrost cycles stress the reversing valve and defrost control board. We test both whenever a system loses heat in winter.
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Older homes with retrofit mini-split circuits
Undersized wiring and aging capacitors fail under load. We check the electrical supply, not just the unit, on every diagnostic.
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Pollen season coating outdoor coils
Packed outdoor coils trip high-pressure faults and cut cooling capacity. A coil cleaning pump and fin comb restore airflow.
Leaking Flare Joint on a Mitsubishi Head
Ductless Mini-Split Problems We Fix in McLean
Most mini-split failures fall into a handful of categories. Here are the ones we see most in McLean, what happens if you ignore them, and how we fix them.
Problem
Mini-split blowing warm air in heat mode
A stuck reversing valve or failed defrost control board leaves you with no heat, and running the system in that state can damage the compressor over time.
Our Fix
We test the reversing valve and defrost board with a multimeter and pressure readings. If the valve is stuck, we replace it, pull a vacuum, and recharge to spec. Most repairs finish in one visit.
Problem
Water leaking from the wall or ceiling head
A clogged condensate drain line overflows the pan and sends water into drywall, insulation, and flooring. Mold can start within 48 hours.
Our Fix
We clear the drain line, flush the pan, and check the float switch. If the coil is frozen and thawing, we find the root cause, whether that is low refrigerant or a failed defrost cycle.
Problem
Mini-split not cooling at all
A refrigerant leak, failed capacitor, or dead compressor leaves the room hot. In a McLean summer, that can push indoor temps past 85 degrees fast.
Our Fix
We check pressures, test the capacitor and contactor, and verify compressor amp draw with a clamp meter. Most no-cool calls trace to a leak or a $200 capacitor, not a dead system.
Problem
Ice on the outdoor unit in winter
A failed defrost cycle lets ice build on the coil, which blocks airflow and kills heating capacity. Left alone, it can damage the fan blade and compressor.
Our Fix
We test the defrost control board and sensors, confirm the reversing valve shifts, and repair the cycle. We also check refrigerant charge, since low charge mimics a defrost fault.
Why McLean Homeowners Call Us First
A ductless system that is down means one room is unlivable. We treat mini-split repair as a same-day priority, not a next-week appointment, and we carry the parts that fail most often on Carrier, Trane, and Mitsubishi Electric heads.
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Same-Day Repair Windows
We hold same-day slots for ductless mini-split repair McLean VA calls, including evenings and weekends. Most single-zone faults, like a failed capacitor or a clogged condensate drain line, are diagnosed and repaired in one visit of two to three hours.
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Refrigerant Leak Detection
A slow leak is the number one reason a mini-split stops cooling. We use an electronic leak detector and nitrogen pressure test to find the joint or flare, repair it, pull a vacuum with a vacuum pump, and recharge to the manufacturer's spec in ounces.
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All Major Brands Serviced
Our techs work on Carrier, Trane, Lennox, Mitsubishi Electric, Daikin, Bosch, Goodman, Rheem, American Standard, and Bryant heads. We stock common capacitors, contactors, and defrost control boards so most repairs finish without a second trip.
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Upfront Pricing, No Surprises
You get the diagnosis and a flat repair price before we open a panel. Typical 2026 mini-split repairs in McLean run $180 to $650 depending on parts. No hidden trip charges, no pressure to replace a system that still has years left.
What Ductless Mini-Split Repair Costs in McLean
Typical 2026 pricing for ductless mini-split repair McLean VA runs $180 to $650 depending on the failed part and how long the repair takes. A capacitor or contactor replacement sits at the low end. A refrigerant leak repair with recharge, or a reversing valve replacement, sits at the high end. You get the flat price before we start, and the diagnostic fee is credited toward the repair. We do not charge trip fees inside McLean.
Typical Investment Range
$180 - $650 depending on scope
You are paying for a correct diagnosis and a repair that holds, not a guess and a top-off. We test the system in heat and cool mode before we leave, and the repair is covered under our parts-and-labor warranty.
What changes the price
01
Failed component
A capacitor runs $180 to $260 installed. A control board or blower motor runs $350 to $550. A reversing valve or compressor job runs higher because it opens the sealed system.
02
Refrigerant leak repair
Leak detection, joint repair, vacuum, and recharge typically add $250 to $450 depending on how much R-410A or R-32 the system takes and how hard the leak is to reach.
03
System accessibility
A wall head at chest height is quick to service. A ceiling cassette, a roof-mounted condenser, or a unit behind furniture adds labor time and can raise the price.
04
Number of zones affected
A multi-zone system with one dead head is a single repair. If the outdoor unit serves several zones and the fault is central, the diagnosis and repair cover the whole system.
05
Parts availability
We stock common capacitors, contactors, and motors for the brands we see most in McLean. A rare board or valve may need to be ordered, which adds a day or two.
Licensed, Certified, and Local
Licensed & Certified
- NATE certification — issued by North American Technician Excellence
- EPA Section 608 certification — issued by U.S. Environmental Protection Agency
- Virginia HVAC contractor license — issued by Virginia Department of Professional and Occupational Regulation
- AHRI certification — issued by Air-Conditioning, Heating, and Refrigeration Institute
- OSHA safety compliance — issued by Occupational Safety and Health Administration
Verified Reviews
Google ★★★★★4.9
Called about a Mitsubishi head blowing warm air. They came the same day, found a stuck reversing valve, and had it fixed in three hours. Showed me the pressure readings before and after. Fair price and no push to replace the system.
Yelp ★★★★★4.8
Water was dripping from our ceiling cassette in Salona Village. They cleared the drain line, cleaned the coil, and checked the float switch. No more drips. Also explained how to keep it from happening again.
BBB ★★★★★4.9
Our mini-split stopped cooling in July. They found a refrigerant leak at a flare joint, repaired it, and recharged the same afternoon. The quote matched the invoice exactly. Will use them for the annual tune-up.
Google ★★★★★5.0
Multi-zone system with one dead head in Langley Forest. They diagnosed a failed control board, had the part on the van, and fixed it in one visit. Professional, on time, and they cleaned up after themselves.
Ductless System Experience You Can Verify
Our technicians hold NATE certification and EPA Section 608 certification, and we work under a Virginia HVAC contractor license. We service ductless heads from Mitsubishi Electric, Daikin, Carrier, and Bosch daily, from single-zone wall units to eight-zone systems in larger McLean homes. Every repair follows AHRI-certified charging practices, and we pull a Fairfax County permit when a job requires one. We also carry OSHA safety compliance on every call, which matters when we are working on a ladder or a roof-mounted condenser.
- NATE-certified technicians with EPA Section 608 refrigerant handling credentials
- Virginia HVAC contractor license and Fairfax County permit compliance on every job
- Factory charging specs followed for R-410A and R-32 systems
- Electronic leak detection and nitrogen pressure testing on every suspected leak
- Same-day parts stocking for capacitors, contactors, and blower motors
What McLean Customers Say About Our Repairs
Real experiences from customers who chose our Ductless Mini-Split Heat Pump Repair services.
“Our Mitsubishi head stopped cooling in July. The tech found a slow refrigerant leak at a flare joint, repaired it, pulled a vacuum, and recharged the same afternoon. He showed me the pressure readings before and after. Cold air by dinner, and the price matched the quote exactly.”
K
Karen M.
Homeowner, Chesterbrook
“The mini-split in our addition was blowing cold air in heat mode. Turned out to be a stuck reversing valve. They had the part on the van and finished in about three hours. Explained what failed and how to avoid it. Fair price, no upsell on a new system.”
D
David R.
Homeowner, Langley Forest
“Water was dripping down our wall from the ceiling cassette. Clogged condensate drain line and a pan full of algae. They cleared it, flushed the line, and added a float switch check. No more drips, and they cleaned the coil while they were in there.”
P
Priya S.
Homeowner, Franklin Park
Ductless Mini-Split Repair Questions McLean Homeowners Ask
Real answers to the questions we hear most often from local homeowners and property managers.
Why is my ductless mini-split not working in McLean VA?
The five most common causes are a refrigerant leak, a failed capacitor, a stuck reversing valve, a clogged condensate drain line, or a control board that lost communication. In McLean, pollen and humidity also pack coils and trip high-pressure faults. A technician with a manifold gauge set and multimeter can isolate the fault in under an hour.
How much does ductless mini-split repair cost in McLean?
Typical 2026 pricing in McLean runs $180 to $650 depending on the part. A capacitor or contactor replacement sits at the low end. A refrigerant leak repair with recharge, or a reversing valve replacement, sits at the high end. You get the flat price before work starts, so there is no surprise on the invoice.
Who fixes ductless mini-split near me in McLean?
We do. McLean Heat Pump Pro Masters services every McLean ZIP, including 22101, 22102, and 22046, plus the surrounding Fairfax County neighborhoods. Call (571) 760-4593 and we book a same-day window for most repair calls. Our techs carry parts for Mitsubishi Electric, Daikin, Carrier, and Trane heads.
Can a ductless mini-split be repaired same-day in McLean Virginia?
Yes, for most common faults. Capacitor, contactor, thermostat, and drain line repairs are usually finished in one visit of two to three hours. Refrigerant leak repairs take longer because we pressure test, repair the joint, pull a vacuum, and recharge to spec. We tell you the expected time when we book the call.
Other Heat Pump Services We Handle
Heat Pump Repair
Whole-system heat pump repair for the central units that back up your ductless heads. If your main system and mini-split share a load, we diagnose both in one visit across McLean.
View Heat Pump RepairHeat Pump Installation
New ductless and central heat pump installation sized to your home. We handle Fairfax County permits and set the system to AHRI-certified charging specs before we hand over the keys.
View Heat Pump InstallationHeat Pump Maintenance
Annual tune-ups that clean coils, test capacitors, and clear condensate lines. A yearly visit is the cheapest way to avoid a mid-winter ductless breakdown in McLean.
View Heat Pump MaintenanceEmergency Heat Pump Repair
24/7 no-heat and no-cool emergency calls. When your only heat source dies on a cold night, we roll a van and get you warm again.
View Emergency Heat Pump RepairHeat Pump Not Heating
Diagnosis for heat pumps blowing cold air in heat mode. We test the reversing valve, defrost control board, and auxiliary heat strips to find the fault.
View Heat Pump Not HeatingHeat Pump Not Cooling
No-cool calls traced to refrigerant charge, compressor, or control board faults. We verify pressures and superheat before quoting a repair.
View Heat Pump Not CoolingContact McLean Heat Pump Pro Masters
Call us any time at (571) 760-4593 for heat pump repair in McLean, Virginia. We answer live 24/7, book same-day appointments, and dispatch emergency calls across Fairfax County. You can also email info@mcleanheatpumppromasters.com or stop by the shop during regular hours.
McLean Heat Pump Pro Masters
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Phone
(571) 760-4593 -
Address
7321 Hooking Rd, McLean, VA 22101
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Hours
Mon–Fri: 7AM – 7PM
Sat: 8AM – 4PM
Sun: Emergency Only
24/7 Emergency Available