Every repair visit covers a full diagnostic, the failed component replacement, and a tested system before we leave. Here is what is included in a standard call, and what we handle as an add-on when the job requires it.
We test refrigerant pressures with a manifold gauge set, check amp draw with a clamp meter, verify control voltage, and inspect the air filter, evaporator coil, and condensate line. You get a written explanation of what failed and why.
Capacitors, contactors, blower motors, igniters, thermostats, and defrost boards are common replacements. We use AHRI-certified parts matched to your system and confirm the new component meets the original spec before installation.
We recover refrigerant with a recovery machine, locate the leak with electronic detection and pressure testing, repair the joint or component, then evacuate with a vacuum pump and recharge to the manufacturer's specified weight.
A clogged PVC condensate line causes water damage and shutdowns. We flush the line, check the trap and float switch, and confirm drainage before the system runs. This is one of the most common causes of summer heat pump failures in Fairfax.
Before we pack up, we run the system through heating and cooling, verify temperature split, check defrost operation, and confirm static pressure is within range. You see the numbers, not just a handshake and a bill.
Heat pump repair Fairfax VA is the diagnostic and mechanical work that restores a system's ability to heat and cool after a failure. It covers refrigerant leak detection, capacitor and contactor replacement, blower motor repair, thermostat troubleshooting, and defrost board service. A proper call starts with a manifold gauge set and clamp meter, not guesswork. We check pressures, amp draw, and control voltage, then trace the fault to the component that actually failed. That is how a no-heat complaint becomes a fixed system instead of a parts swap.
Fairfax homes run heat pumps hard from October through April, and the shoulder seasons hide small faults until the first cold snap. If your heat pump is not working in Fairfax VA, the cause is often a failed capacitor, a clogged air filter, or a refrigerant leak that has been slow since summer. We also see frozen evaporator coils and tripped breakers after heavy ice. If you search heat pump repair near me in Fairfax VA same day, call us and we will get a tech to your door.
Five steps, no mystery. Here is exactly what happens from the moment you call until your system is heating and cooling again.
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 high-side and low-side refrigerant pressures so we can confirm charge, detect restrictions, and diagnose compressor performance before touching a part.
Clamp meter and multimeter
Measures amp draw and control voltage at the compressor, blower motor, and contactor. This is how we separate an electrical failure from a refrigerant problem.
Refrigerant recovery machine and vacuum pump
Recovers refrigerant to EPA Section 608 standards before a repair, then evacuates the system to remove moisture and non-condensables before recharging.
Psychrometer
Measures wet-bulb and dry-bulb temperatures to calculate system capacity and verify the heat pump is delivering the temperature split it should.
Tube cutter, flaring tool, and torch kit
Used for copper tubing repairs, flare fittings, and brazed joints when we replace a leaking line or install a new component in the refrigerant circuit.
Pipe wrench and hand tools
For condensate line service, valve replacement, and the mechanical work around the outdoor unit and air handler.
NATE-certified diagnostics
Every technician follows a standardized diagnostic sequence: verify the complaint, test electrical and refrigerant parameters, isolate the fault, then confirm the repair. This prevents the parts-swapping that drives up cost without fixing the problem.
EPA Section 608 refrigerant handling
We recover, recycle, and recharge refrigerant according to EPA Section 608 rules. That means no venting, correct recovery equipment, and charge weighed back to the manufacturer's specification rather than guessed by pressure alone.
ACCA quality standards
We size, test, and commission systems to ACCA standards, including static pressure and airflow verification. This is how we confirm a repair actually restored performance instead of just making the unit run.
Virginia HVAC license compliance
All work is performed under a Virginia HVAC license and meets state mechanical code. Permits and inspections are handled correctly when a repair crosses into regulated territory.
01
What we do: We prioritize no-heat calls and dispatch a technician with defrost boards, reversing valves, and capacitors on the truck. The tech tests refrigerant charge and control voltage, finds the fault, and repairs it on the spot whenever parts allow.
→ Most customers have heat back the same day. You get a tested system and a clear explanation of what failed, plus a filter and maintenance schedule to prevent a repeat.
02
What we do: We diagnose the defrost cycle, check the sensor and control board, and clear the ice safely without damaging the coil fins. If the defrost board failed, we replace it and force a full defrost cycle to confirm the fix.
→ The unit clears, runs a normal defrost cycle, and returns to full heating capacity. You avoid the compressor damage that comes from running an iced-over system.
03
What we do: We test refrigerant charge, check the air filter and evaporator coil, and measure amp draw on the compressor and blower. Low charge, a dirty coil, or a weak capacitor are the usual culprits, and each is a same-visit repair.
→ The system returns to normal run times and your bill drops back toward where it was. You also get a maintenance plan to keep the charge and airflow in spec.
04
What we do: We service Mitsubishi Electric and Daikin heads, test the inverter board, check refrigerant pressure, and clean the blower and coil. If a board or sensor failed, we order the exact part and schedule a fast return visit.
→ The mini-split returns to full capacity, often within two visits. You get quiet, efficient cooling back without replacing the whole system.
Fairfax sits in a climate that swings from humid 95-degree summers to single-digit winter nights, and that range punishes heat pumps. Long defrost cycles in January and heavy cooling loads in July are the two conditions that drive most failures here. Older neighborhoods like Annandale and Falls Church are full of 1990s split systems running R-410A, while newer construction in Vienna and Chantilly leans toward inverter-driven and ductless systems using R-32. We stock parts for both. If you need heat pump service in Fairfax, Virginia during a cold snap, we prioritize no-heat calls and dispatch from the nearest truck. Fairfax County also enforces mechanical code on refrigerant handling and electrical work, so we keep every repair code-correct and documented. Whether your system is a Carrier split unit or a Mitsubishi Electric mini-split, the local playbook is the same: diagnose fast, repair right, and verify performance before we leave.
Annandale
Lots of 1990s split-system heat pumps here. We keep R-410A and common capacitors, contactors, and defrost boards on the truck for these older units.
Vienna
Newer construction with inverter-driven heat pumps and ductless heads. These need inverter board and sensor diagnostics rather than the older relay-and-capacitor approach.
Fairfax Station
Larger lots and longer refrigerant line runs mean more flare-fitting leaks. We pressure-test lines carefully before assuming a compressor problem.
Centreville
Townhome clusters with tight outdoor unit clearances. Airflow and static pressure checks matter here because restricted space affects defrost and capacity.
Ice storms and long defrost cycles
Ice buildup on the outdoor coil is the leading winter failure we see. A failed defrost board or sensor will let the unit ice over and stop heating, so we test the full defrost sequence on every cold-season call.
Humid summers and heavy cooling loads
High humidity means condensate lines clog faster and evaporator coils freeze more often. We flush the PVC condensate line and check the float switch on most summer repairs.
Older housing stock with original systems
Many Fairfax homes still run 15-to-25-year-old heat pumps. On these calls we weigh repair cost against remaining lifespan and give you honest numbers instead of pushing a replacement.
Most heat pump failures fall into a handful of categories. Here are the ones we see most often across Fairfax County, what happens if you ignore them, and how we fix them.
Problem
A system that runs but blows cool air will run constantly, spike your electric bill, and leave the house cold. Auxiliary heat strips may mask the problem until they fail too.
Our Fix
We test refrigerant charge, reversing valve operation, defrost board function, and auxiliary heat staging. Most no-heat calls trace to a failed defrost board, a stuck reversing valve, or low refrigerant. We repair the fault and verify the system heats to spec.
Problem
Ice buildup blocks airflow, forces the compressor to work harder, and can permanently damage the outdoor unit. Ignoring it usually turns a $300 repair into a $2,000 replacement.
Our Fix
We diagnose the defrost sensor, control board, and reversing valve, then repair or replace the failed component. After the fix, we force a defrost cycle and confirm the coil clears completely before we leave.
Problem
Low refrigerant drops capacity, freezes the evaporator coil, and eventually kills the compressor. Topping off without finding the leak just delays the failure and wastes money.
Our Fix
We use electronic leak detection and pressure testing to find the exact leak point, repair the joint or component, then evacuate and recharge with R-410A or R-32 to the manufacturer's specified weight.
Problem
No airflow means no heating and no cooling. The system may short-cycle, trip the breaker, or freeze the coil within hours. In summer, that turns a comfortable house into an oven fast.
Our Fix
We test the motor windings, capacitor, and control board, then replace the failed component. Most blower motor repairs finish in two to three hours, and we verify airflow and static pressure before leaving.
A failed heat pump is a comfort emergency, not a convenience issue. These are the outcomes our customers care about most, and the ones we build every service call around.
Same-Day Diagnostics
Most heat pump service Fairfax VA calls get a technician at the door the same day. We test pressures, amp draw, and control voltage on arrival, so you get a real diagnosis in about 60 to 90 minutes instead of a vague estimate and a return trip.
All Major Brands Serviced
We repair Carrier, Trane, Lennox, Goodman, Rheem, York, Mitsubishi Electric, Daikin, Bryant, and American Standard systems. Parts for these brands are stocked on most trucks, which means a capacitor, contactor, or blower motor fix often happens on the first visit rather than the second.
Licensed and Code-Correct
Every technician holds NATE certification and EPA Section 608 certification, and we work under a Virginia HVAC license. Refrigerant handling, electrical connections, and condensate routing all meet ACCA quality standards, so the repair holds up and passes inspection.
Repairs Backed by Warranty
We warranty our workmanship, and we use AHRI-certified parts matched to your system. If a repair fails inside the warranty window, we come back and make it right. That is the difference between a quick patch and heat pump repair and maintenance Fairfax VA homeowners can actually rely on.
Google ★★★★★4.9
Called about a heat pump not heating on a Sunday. They had a tech out by noon, found a failed defrost board, and fixed it the same visit. Price matched the quote. Fairfax HVAC Experts is now my go-to for anything HVAC.
Yelp ★★★★★4.8
Our mini-split quit in the middle of a heat wave. The technician diagnosed an inverter board, ordered the part, and came back quickly to install it. He tested everything before leaving and explained the maintenance I needed to do.
BBB ★★★★★4.9
Honest pricing and no upsell. They could have pushed a new system on us but repaired the existing one for a fraction of the cost. Two winters later it is still running strong. Highly recommend for heat pump repair in Fairfax.
Fairfax HVAC Experts has been repairing heat pumps since 2004, which means 22 years of Northern Virginia winters, ice storms, and humid summers. Our technicians hold NATE certification and EPA Section 608 certification, and we work under a Virginia HVAC license. We have serviced thousands of systems across Fairfax County, from 1990s split systems in Annandale to modern ductless mini-splits in Vienna. That volume matters: we have seen nearly every failure mode a heat pump can produce, and we know which parts fail first in this climate.
Real experiences from customers who chose our Heat Pump Repair services.
“Our heat pump stopped heating on a Friday night in January. Fairfax HVAC Experts had a tech at the house Saturday morning. He found a failed defrost board and a weak capacitor, had both on the truck, and we had heat by lunch. The price matched the quote exactly. I have used three HVAC companies in Fairfax and these guys are the only ones I will call again.”
Dana R.
Homeowner, Annandale
“I called about a heat pump not cooling in July. The tech tested refrigerant pressures, found a slow leak at a flare fitting, and repaired it the same visit. He also showed me the clogged filter that contributed to the problem. Fair, fast, and he explained everything without talking down to me. Two months later the system is still holding pressure.”
Marcus T.
Homeowner, Vienna
“We have a ductless mini-split in a home office that quit during a heat wave. The technician diagnosed an inverter board failure, ordered the part, and came back two days later to install it. He tested the system through a full cycle before leaving. Honest pricing and no upsell. I have already recommended them to two neighbors in Burke.”
Priya S.
Homeowner, Burke
Real answers to the questions we hear most often from local homeowners and property managers.
When a heat pump dies at 2 a.m. in January, emergency HVAC repair gets you heat fast. We prioritize no-heat calls across Fairfax County and carry the capacitors, contactors, and igniters that fail most often during cold snaps.
View Emergency HVAC RepairA heat pump in cooling mode is an air conditioner. If your system is blowing warm air in July, our AC repair service uses the same diagnostic tools and refrigerant expertise. Many Fairfax homeowners book both services in one visit.
View AC RepairIf your heat pump is past 15 years and facing a major repair, AC installation may be the smarter spend. We size new systems to your home's load, not a rule of thumb, and handle the full install under a Virginia HVAC license.
View AC InstallationAC replacement makes sense when compressor or reversing valve failure meets an aging system. We walk you through efficiency ratings, refrigerant type, and rebate options, then remove and replace the outdoor unit and matched indoor coil.
View AC ReplacementSome Fairfax homes run a heat pump with a gas furnace backup. When the furnace side fails, you lose emergency heat. Our furnace repair techs handle igniters, flame sensors, and inducer motors on the same visit.
View Furnace RepairIf your backup furnace is done, furnace installation pairs cleanly with heat pump service. We match the new furnace to your existing heat pump capacity so the dual-fuel switchover works correctly on the first cold night.
View Furnace InstallationReach 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
