Full System Diagnostic
We test refrigerant pressures, compressor and motor amp draw, thermostat calibration, and defrost operation. This 45 to 60 minute process identifies the actual failure so you are not paying to replace parts that still work.
Licensed
Licensed & Bonded
Fully Insured
Insured & Bonded
24/7 Emergency
Same-Day Response
Warranty Backed
Workmanship Guaranteed in McLean
What Our Air Source Heat Pump Repair Includes
Every repair visit includes a full diagnostic, an upfront price, and a test of the completed work. Here is what is covered in a standard Air Source Heat Pump Repair in McLean call, and what we handle as an add-on when the diagnosis points somewhere else.
Electrical Component Repair
Capacitors, contactors, control boards, and wiring faults are repaired or replaced with OEM-spec parts. We verify voltage and amp draw after the repair to confirm the circuit is healthy and the new part is not being stressed.
Refrigerant Leak Repair and Recharge
If charge is low, we locate the leak with an electronic detector, repair the line or component, then evacuate and recharge with R-410A or R-32 to factory weight. No top-offs without finding the leak first.
Mechanical Repair
Blower motors, fan motors, reversing valves, and compressors are repaired or replaced as needed. We confirm the diagnosis with pressure and temperature readings before recommending major component work.
Airflow and Defrost Verification
We check filter condition, coil cleanliness, and static pressure, then confirm the defrost cycle initiates and completes. Poor airflow and defrost faults cause many of the repeat failures we see on air source systems.
Post-Repair Test and Walkthrough
We run the system in both modes, measure supply and return temperatures, and walk you through what failed and what to watch for. Parts warranty documentation is handed over before we leave.
Air Source Heat Pump Repair in McLean, Virginia
Air Source Heat Pump Repair in McLean is the diagnostic and mechanical work that gets a failing air-to-air heat pump back to full heating and cooling capacity. That means pulling refrigerant pressures with a manifold gauge set, testing capacitors and contactors with a multimeter, checking the reversing valve, and verifying the defrost control board actually cycles. We repair compressors, blower motors, fan motors, and control boards, then recharge with R-410A or R-32 refrigerant to the manufacturer's spec.
Most McLean calls we run start the same way: the heat pump is blowing cold air in heat mode, the outdoor unit is frozen solid, or the thermostat is calling but nothing happens. Fairfax County's humid summers and freezing winter nights are hard on air source equipment, especially in older homes around Chesterbrook and Salona Village where ductwork was sized for gas furnaces. If your air source heat pump is not working in McLean, we diagnose the actual failure instead of guessing at parts.
What to Expect From Our Repair Process
From the first phone call to the final temperature check, here is exactly how Air Source Heat Pump Repair in McLean runs when you book with us.
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.
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Guarantee
Every job backed by a written workmanship warranty — and we stand behind it.
Tools and Methods We Use
Tools & Equipment
Manifold gauge set
Reads high and low side refrigerant pressures so we can confirm charge, spot a restriction, and diagnose compressor and reversing valve performance.
Vacuum pump and refrigerant recovery machine
Evacuates the system to remove moisture and non-condensables, and recovers refrigerant legally before any line or component repair.
Clamp meter and multimeter
Measures amp draw on compressors and motors and tests voltage, capacitance, and continuity on capacitors, contactors, and control boards.
Electronic leak detector
Pinpoints refrigerant leaks at flare fittings, brazed joints, and coil tubing so we repair the source instead of topping off charge.
Coil cleaning pump and fin comb
Cleans condenser and evaporator coils and straightens bent fins, restoring airflow and heat transfer on dirty outdoor units.
Duct pressure gauge
Measures static pressure to find airflow restrictions and duct leaks that cause frozen coils and uneven room temperatures.
Thermostat calibration tool
Verifies thermostat accuracy and configuration so the system stages and switches modes the way the manufacturer intended.
Methods & Standards
NATE-certified diagnostic sequence
We follow the industry-standard sequence: verify the call at the thermostat, test electrical components, check refrigerant pressures, then evaluate airflow and defrost. This order prevents misdiagnosis and keeps repairs targeted.
EPA Section 608 refrigerant handling
All refrigerant work follows EPA Section 608 rules. We recover, evacuate, and weigh in charge to factory spec, which protects both the system and the environment.
Fairfax County permit compliance
When a repair involves electrical or refrigerant-line work that requires a permit, we pull it through Fairfax County and schedule the inspection so the job is code-correct and documented.
AHRI-matched components
Replacement parts and components are matched to AHRI standards so your system stays within its rated efficiency and capacity envelope after the repair.
OSHA safety compliance
Electrical lockout, refrigerant handling, and ladder work all follow OSHA safety compliance standards. Safe work is fast work, and it keeps your home and our techs protected.
When McLean Homeowners Call Us
01
The heat pump quits on a 20-degree January night and the house is dropping fast.
What we do: We dispatch a tech with emergency parts on board, diagnose the no-heat fault, and repair it on site. If the failure is a capacitor, contactor, or defrost board, we usually have it fixed within a few hours of arrival.
→ Heat restored the same night, with the backup strip no longer carrying the whole load and your electric bill back to normal.
02
The system runs constantly in July but the house will not get below 78 degrees.
What we do: We check refrigerant charge, clean the condenser coil, test the capacitor and contactor, and measure airflow. Low charge from a slow leak is a common finding, so we locate and repair the leak before recharging.
→ Supply air temperature drops back into the normal range and the system holds setpoint through the afternoon instead of running nonstop.
03
The outdoor unit is caked in ice and the defrost cycle never seems to run.
What we do: We test the defrost control board, sensor, and reversing valve, then repair or replace the failed part. We also verify charge and airflow, since both affect how the coil clears.
→ The coil defrosts on schedule, capacity returns, and the compressor stops running under the stress of a blocked coil.
04
A home inspection flags the heat pump before a McLean home sale.
What we do: We run a full diagnostic, document pressures, amp draw, and temperature split, and repair anything that fails. The report gives buyers and sellers a clear picture of system condition.
→ A clean inspection report, a documented repair, and a closing that does not stall over HVAC findings.
How Air Source Heat Pump Repair Runs in McLean
McLean sits in a climate that swings hard: humid 90-degree summers and winters that drop into the teens, which is exactly the range where air source heat pumps work hardest. Homes around Langley Forest and Country Club Hills often have larger square footage and zoned systems, while older properties near Salona Village and Old Chesterbrook still run ductwork sized decades ago. That mismatch causes airflow problems that show up as frozen coils and short cycling. When you call for air source heat pump service McLean VA, we bring the tools to measure static pressure and charge, not just swap parts. Fairfax County requires permits for certain electrical and refrigerant-line work, and we handle that. If you are searching for HVAC air source heat pump repair McLean Virginia cost, ask us for the flat price before we start, and we will give it to you straight.
Neighborhoods We Serve
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Langley Forest
Larger homes with multi-zone systems. We often find airflow imbalance between zones, which stresses the heat pump and causes uneven temperatures.
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Chesterbrook
Mix of older and newer construction. Older ductwork frequently needs sealing and balancing to keep air source equipment running within spec.
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Salona Village
Many homes here have mature trees that drop debris into outdoor units. Coil cleaning and fan motor checks are common calls in fall.
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West McLean
A steady mix of repairs and replacements. We see a lot of failed capacitors and contactors on systems that are 10 to 15 years old.
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Downtown McLean
Tighter lots mean outdoor units sit close to walls and shrubs, which restricts airflow and can cause high head pressure in summer.
Local Conditions We Plan For
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Freeze-thaw cycles from December through March
Defrost cycles run more often, and any weakness in the defrost board, sensor, or reversing valve shows up fast. We test all three on winter no-heat calls.
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High summer humidity
Condensate drains clog with algae quickly, and condenser coils collect debris. We clear drains and clean coils as part of most summer service calls.
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Older ductwork in established neighborhoods
Undersized or leaky ducts cause static pressure problems that freeze coils and shorten compressor life. We measure and correct airflow before condemning equipment.
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Fairfax County code requirements
Electrical and refrigerant-line work may require a permit and inspection. We pull permits and schedule inspections so repairs are documented and code-correct.
Frozen Coil to Full Heat in One Visit
Heat Pump Problems We Fix in McLean
These are the failures we see most often on air source heat pumps in McLean, and what happens if you let them run.
Problem
Heat pump blowing cold air in heat mode
A reversing valve or defrost fault leaves you without heat and forces the backup electric strip to run constantly, which can double your winter power bill within weeks.
Our Fix
We test the reversing valve, defrost control board, and thermostat configuration in sequence, then repair the failed component. Most cold-air calls are resolved the same day once we confirm which part is not shifting or cycling correctly.
Problem
Outdoor coil frozen solid in winter
A coil that stays frozen blocks airflow and capacity, and the compressor runs under high stress until it trips or fails. Ignoring it turns a $300 board repair into a $1,900 compressor job.
Our Fix
We diagnose the defrost cycle, check the sensor and board, verify refrigerant charge, and confirm the reversing valve shifts into defrost. Repairing the cycle restores normal operation and protects the compressor.
Problem
Heat pump not cooling in summer
No cooling in a McLean July means a hot house and a system that may be running but not moving heat. A failed capacitor or dirty condenser coil can push the compressor toward failure.
Our Fix
We test the capacitor and contactor, clean the condenser coil, check charge, and verify airflow. Most no-cool calls are fixed with a capacitor or contactor replacement plus a coil cleaning, all in one visit.
Problem
Water leaking around the indoor unit
A clogged condensate drain line or overflowing pan can damage ceilings, drywall, and flooring. In humid McLean summers, algae growth clogs drains fast if they are not cleared.
Our Fix
We clear the drain line, check the pan and float switch, and confirm the coil is draining properly. If the line needs a trap or reroute, we handle that during the same visit.
Problem
System short-cycling or not keeping up
Short cycles wear out the compressor and contactor, raise electric bills, and leave rooms uncomfortable. It often traces to an oversized system, low charge, or a thermostat issue.
Our Fix
We measure runtime, static pressure, and charge, then correct the airflow, refrigerant, or thermostat fault. If the equipment is genuinely oversized, we tell you that straight instead of selling parts.
Why McLean Homeowners Call Us First
A failed heat pump is a comfort emergency, not a convenience problem. These are the outcomes that matter when you book Air Source Heat Pump Repair in McLean with us.
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Same-Day Repair Windows
We hold same-day slots for no-heat and no-cool calls, and our vans carry the capacitors, contactors, and fan motors that cause roughly 6 out of 10 failures. Most repairs are finished in a single 2 to 4 hour visit, so you are not waiting days for a second trip.
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All Major Brands Serviced
Carrier, Trane, Lennox, Mitsubishi Electric, Daikin, Bosch, Goodman, Rheem, American Standard, and Bryant. We stock OEM-spec parts and follow each manufacturer's charging and airflow specs, so your warranty stays intact and the fix actually holds through the season.
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Licensed and Code-Correct
Our techs hold NATE certification and EPA Section 608 certification, and we pull Fairfax County permits when a job requires one. Refrigerant work is done with a recovery machine, never vented, and every electrical repair follows OSHA safety compliance standards.
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Upfront Pricing, No Surprises
You get the diagnosis and a flat price before we start turning wrenches. No hourly meter running, no upsell script. If the honest answer is that a 14-year-old unit is not worth a $1,900 compressor, we will tell you that straight and walk you through your options.
Air Source Heat Pump Repair Pricing
We quote flat prices, not hourly rates, so you know the number before we start. Typical 2026 pricing in McLean runs $180 to $450 for common electrical and airflow repairs, and $600 to $1,900 for compressor, reversing valve, or control board work. Refrigerant leak detection and recharge adds $250 to $700 depending on the refrigerant and how much the system takes. Diagnostic fees are credited toward the repair. If you want air source heat pump service McLean VA with no surprise line items, that is how we run every call.
Typical Investment Range
$180 - $1,900 depending on the failed component and refrigerant work
A $300 capacitor repair that restores heat is cheaper than a week of emergency space heaters and a stressed compressor. We price the actual failure, not a package, so you pay for what your system needs and nothing more.
What changes the price
01
Failed component type
A capacitor or contactor is a quick, low-cost repair. A compressor, reversing valve, or control board takes more labor, more refrigerant handling, and a higher parts cost, which is why those jobs land in the upper range.
02
Refrigerant type and charge
Systems using R-410A and newer units using R-32 have different refrigerant costs. If we have to recover, evacuate, and weigh in a full charge, that adds to the total, especially on larger systems.
03
Leak location and repair
A flare fitting leak is a straightforward repair. A leak inside a coil or buried in a line set takes longer to find and fix, which raises labor. We always locate the leak before recharging.
04
Access and system age
Tight mechanical closets, rooftop units, and systems with brittle wiring take more time. Older equipment also tends to have seized fasteners and fragile components that slow the work.
05
After-hours or emergency timing
Standard business-hour calls carry standard pricing. Nights, weekends, and holidays fall under emergency rates, which we quote on the phone before dispatching a tech.
06
Repair versus replacement
If a repair costs more than a third of replacement value on a system near the end of its life, we show you both numbers. Sometimes the honest answer is to put the money toward new equipment.
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 Commonwealth of Virginia
- 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 at 9 p.m. with no heat and they had a tech at the house within two hours. Found a bad defrost board, replaced it, and had us warm before midnight. Fair price and no pressure to buy anything else.
Yelp ★★★★★4.8
They diagnosed a refrigerant leak two other companies missed, repaired the line, and recharged the system. Our heat pump has run perfectly since. Honest, clean work and they explained everything in plain English.
BBB ★★★★★4.9
Replaced a compressor on our 12-year-old Carrier unit instead of pushing a full replacement. Saved us thousands and the system is still going strong. They showed us the test results and the old part.
Google ★★★★★5.0
Same-day service on a July no-cool call. Capacitor and contactor replaced, coil cleaned, and the house was cool by dinner. Upfront price matched the final invoice exactly.
Local Experience You Can Verify
Our technicians work on air source heat pumps every day, across every major brand and every generation of equipment, from older R-410A systems to newer R-32 units. We hold NATE certification and EPA Section 608 certification, and we stay current on the electrical and refrigerant codes that govern Fairfax County installations. That matters because heat pump diagnostics is a process of elimination, and guessing gets expensive fast. We have run thousands of service calls in McLean and the surrounding neighborhoods, so we know which failures are common here and which ones point to something bigger.
- NATE-certified technicians with EPA Section 608 refrigerant handling certification
- Factory-trained on Carrier, Trane, Lennox, Mitsubishi Electric, and Daikin equipment
- Full diagnostic toolset: manifold gauges, vacuum pumps, recovery machines, clamp meters
- Fairfax County permit experience for electrical and refrigerant-line work
- AHRI-certified matching of components so repairs keep your system within spec
What McLean Homeowners Say
Real experiences from customers who chose our Air Source Heat Pump Repair services.
“Our heat pump was blowing cold air on the coldest night of January. They came out the same evening, found a stuck reversing valve, and had heat back in about three hours. The tech explained what he was testing and why, and the price he quoted was the price we paid. No drama, no upsell.”
K
Karen M.
Homeowner, Chesterbrook
“Two other companies told me I needed a whole new system. McLean Heat Pump Pro Masters tested the compressor, found a failed capacitor and a weak contactor, and fixed it for under $400. That was last fall and the unit is still running strong. Honest diagnosis saved me thousands.”
D
David R.
Homeowner, Langley Forest
“Our outdoor unit was frozen solid and the defrost cycle was not running. They replaced the defrost control board, checked the charge, and cleaned the coil. The system has not frozen once since, and our electric bill dropped noticeably. Scheduling was easy and they showed up inside the window they promised.”
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Priya S.
Homeowner, West McLean
Frequently Asked Questions About Heat Pump Repair
Real answers to the questions we hear most often from local homeowners and property managers.
Why is my air source heat pump not working in McLean VA?
The most common causes we find are a failed capacitor, a stuck reversing valve, a bad defrost control board, or low refrigerant from a leak. In McLean, frozen coils in January and tripped breakers in July top the list. A proper diagnostic with a manifold gauge set and clamp meter identifies the real failure in under an hour, so you are not replacing parts by guesswork.
How much does air source heat pump repair cost in McLean?
Typical 2026 pricing in this area runs $180 to $450 for common repairs like capacitors, contactors, thermostats, and fan motors, and $600 to $1,900 for compressor, reversing valve, or control board work. Diagnostic fees are credited toward the repair. Refrigerant leak detection and recharge adds $250 to $700 depending on how much R-410A or R-32 the system takes.
Who fixes air source heat pump near me in McLean?
McLean Heat Pump Pro Masters does. We are a local heat pump repair company serving McLean, VA and Fairfax County, with NATE-certified techs and EPA Section 608 certification. We work on every major brand, carry common parts on the van, and cover neighborhoods from Downtown McLean to Langley Forest and West McLean. One call books a same-day diagnostic.
Can an air source heat pump be repaired same-day in McLean Virginia?
Yes, most repairs are same-day. Roughly 6 out of 10 no-heat and no-cool calls are fixed in a single 2 to 4 hour visit because the failed part is a capacitor, contactor, thermostat, or fan motor we stock on the van. Compressor and reversing valve jobs usually need one extra day for the part to arrive.
Related Heat Pump Services
Heat Pump Repair
General heat pump repair covers the same diagnostics we run on air source units, including electrical, refrigerant, and airflow faults. If your system is not heating or cooling, this is the starting point before we narrow it to an air source-specific fix.
View Heat Pump RepairHeat Pump Installation
When a repair no longer makes financial sense, we install replacement air source systems sized for your McLean home. We handle the load calculation, Fairfax County permit, line set, and startup so the new unit runs to spec from day one.
View Heat Pump InstallationHeat Pump Maintenance
Twice-a-year maintenance keeps air source heat pumps out of the repair queue. We clean coils, check refrigerant charge, test capacitors and contactors, and verify the defrost cycle before winter. Most of the breakdowns we see were preventable with a $149 tune-up.
View Heat Pump MaintenanceEmergency Heat Pump Repair
No heat at 2 a.m. in January is an emergency, and we treat it that way. Our 24/7 line reaches a live tech who can talk you through breaker and thermostat checks while a van is dispatched to your McLean address.
View Emergency Heat Pump RepairHeat Pump Not Heating
A heat pump that runs but will not heat usually points to a reversing valve, defrost control board, or refrigerant charge issue. We test each in sequence and repair the actual failure instead of replacing parts until something works.
View Heat Pump Not HeatingHeat Pump Not Cooling
No cooling in July often traces to a failed capacitor, a dirty condenser coil, or low refrigerant. We check amp draw, coil condition, and pressures, then repair the fault so your system holds temperature through the next heat wave.
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