Every reversing valve repair we do in McLean follows the same sequence: full diagnosis, confirmed failure, repair or replacement, and a verified mode change. Here is what is covered in a standard valve repair, and what we handle as an add-on only when your system needs it.
We test thermostat call, control board output, solenoid coil resistance, and refrigerant pressures in both heating and cooling modes. This is how we confirm the valve is actually stuck rather than a thermostat or defrost board failure.
If the coil reads open on a multimeter, we replace just the solenoid. This is the least expensive fix, runs about 45 minutes, and restores mode switching without opening the refrigerant circuit.
When the valve body itself is stuck, we recover the R-410A, cut out the old valve, braze in a new one, replace the filter drier, pull a deep vacuum, and recharge by weight. This is a two-to-four-hour job.
We recover refrigerant with a recovery machine, purge with nitrogen during brazing, and recharge to the manufacturer's specified weight. Proper recharge by weight is what keeps pressures and valve operation correct.
We cycle the system through heat, cool, and defrost three times and check supply air temperature at the register. You see the readings before we leave, so you know the valve is shifting correctly.
We clean the outdoor coil with a fin comb and coil cleaning pump when needed, check the air filter, and verify the condensate drain line is clear. Dirty coils and blocked drains cause problems that look like valve failures.
Heat Pump Reversing Valve Repair McLean VA is the diagnostic and mechanical work that restores a heat pump's ability to switch between heating and cooling. The reversing valve is a four-way brass or steel valve with a sliding piston moved by a solenoid coil and refrigerant pilot pressure. When it sticks, the system stays locked in one mode, blows cold air in heat mode, or trips the defrost control board. We test the coil with a multimeter, check pilot pressure with a manifold gauge set, and confirm the signal from the thermostat before we quote the repair.
Most McLean calls for a heat pump reversing valve stuck McLean VA come in during the first cold snap, when a system that ran fine all summer suddenly blows 58-degree air. Others show up in July when the valve jams in heat mode and the house climbs past 80. In older Chesterbrook and Franklin Park homes, valves that have cycled for 12 to 15 years are the usual suspects. We also see solenoid coil failures on Carrier, Trane, and Lennox units where the valve body is still good but the coil reads open.
You get a clear sequence from the first phone call to the final temperature check. Here is exactly what happens when we roll up to your McLean home for a reversing valve problem.
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 discharge pressures in both heating and cooling modes. A valve that will not shift shows a flat pressure differential when the mode changes.
Multimeter and clamp meter
Tests solenoid coil resistance and control board output. An open coil reads infinite resistance, which confirms the coil has failed.
Refrigerant recovery machine
Recovers R-410A or R-32 before we open the circuit to replace a valve, keeping the job legal under EPA Section 608 rules.
Vacuum pump
Pulls a deep vacuum on the system after brazing in a new valve. Skipping this step is the top reason valve repairs fail months later.
Leak detection electronic detector
Finds refrigerant leaks that drop pilot pressure and keep a reversing valve from shifting. We check for leaks before and after valve replacement.
Fin comb and coil cleaning pump
Cleans the outdoor coil so airflow and heat transfer are correct after the valve repair. Dirty coils mimic valve problems.
Thermostat calibration tool
Verifies the thermostat is calling for the correct mode. A miscalibrated thermostat can leave a good valve in the wrong position.
EPA Section 608 recovery and recharge
We recover all refrigerant before opening the circuit, purge with nitrogen while brazing, pull a vacuum to 500 microns, and recharge by weight. This sequence protects the new valve and keeps the system within code.
Pressure differential testing
We compare suction and discharge pressures in heat mode and cool mode. A healthy reversing valve produces a clear pressure shift; a stuck valve does not. This test confirms the diagnosis before we quote parts.
Solenoid load testing
We test the solenoid coil with a multimeter and confirm the control board is sending voltage under load. This separates a failed coil from a failed board, which saves you from paying for the wrong part.
Three-cycle verification
After the repair, we cycle the system through heat, cool, and defrost three times and check supply air temperature at the register. If the valve shifts cleanly all three times, the repair is done.
01
What we do: We test the solenoid coil and find it open. The valve body is still good, so we replace just the coil, verify the mode change, and check the defrost control board while we are there.
→ Heat is back the same morning for under $600, and the homeowner avoids a full system replacement for another few seasons.
02
What we do: We confirm the valve will not shift, recover the R-410A, braze in a new four-way valve, replace the filter drier, pull a vacuum, and recharge by weight. Total job time is about three hours.
→ Cooling returns the same day, and compressor amp draw confirms the valve failure did not damage the compressor.
03
What we do: We diagnose a partially stuck valve with a manifold gauge set, replace the valve, and clean the outdoor coil with a fin comb and coil cleaning pump while the system is open.
→ The noise stops, supply air temperature stabilizes at 98 to 102 degrees, and the system runs through the rest of winter without a callback.
04
What we do: We test the defrost control board and the reversing valve and find the valve is not shifting during defrost. We replace the valve and verify the board is sending the correct signal.
→ Defrost cycles complete normally, the coil stays clear, and the homeowner stops losing heat every few weeks.
McLean sits in Fairfax County, where winters swing between 20-degree nights and 45-degree afternoons. That temperature spread forces heat pumps to cycle the reversing valve more often than in a milder climate, and every cycle wears the piston and solenoid a little more. Homes in Chesterbrook, Franklin Park, and Old Chesterbrook often have original heat pumps from the late 2000s or early 2010s, which puts them right in the window where valve failures become common. We also see a lot of Carrier, Trane, and Lennox systems in Langley Forest and Country Club Hills, and we stock the valves and coils those brands use. If you are searching for HVAC heat pump reversing valve McLean Virginia cost, the honest answer is that most repairs land between $480 and $1,450 depending on whether we replace the coil or the full valve body. We pull Fairfax County permits when a job requires one and follow Virginia HVAC contractor license requirements on every repair. For homeowners in ZIP codes 22101, 22102, and 22046, we can usually be on-site within four hours of your call.
Chesterbrook
Many homes here have heat pumps installed 12 to 15 years ago, which is the age range where reversing valves commonly stick.
Langley Forest
Larger homes with zoned systems and multiple heat pumps. We often find one zone locked in the wrong mode while the others run fine.
West McLean
A mix of older and newer construction. Newer Carrier and Trane systems tend to have solenoid coil failures rather than valve body failures.
Salona Village
We see Goodman and Rheem units here with defrost control board issues that mimic a stuck reversing valve.
Country Club Hills
Mature landscaping means more debris around outdoor units, which can block airflow and cause coil freeze-ups that look like valve failures.
Wide winter temperature swings in Fairfax County
Frequent mode changes wear the reversing valve piston and solenoid faster. Annual valve cycling during maintenance catches the wear before it becomes a mid-winter failure.
Aging heat pump stock in Chesterbrook and Franklin Park
Systems past 12 years are the most likely to need a full four-way valve replacement rather than a simple coil swap. We stock both parts to handle either outcome in one visit.
Summer humidity and heavy cooling demand
A valve stuck in heat mode during a July heat wave pushes indoor temperatures past 80 degrees fast. We prioritize these calls for same-day service.
Older ductwork in McLean homes
Airflow imbalance can make a working valve seem faulty because one part of the house never reaches setpoint. We check duct pressure and balance airflow after the valve repair.
A stuck reversing valve shows up in a handful of predictable ways. If you recognize your system in any of these, the valve is the first thing we test.
Problem
Your house never reaches the thermostat setpoint, the auxiliary heat runs constantly, and your electric bill spikes 30 to 40 percent in a single month.
Our Fix
We test the valve shift and solenoid coil first, because a valve stuck in cooling mode is the most common cause. If the coil is open, we replace it in under an hour. If the valve body is stuck, we swap it and recharge the system the same visit.
Problem
The system runs but never cools, indoor temperatures climb past 80 degrees, and the compressor runs against high head pressure, which shortens its life.
Our Fix
We confirm the valve will not shift to cooling, check control board output, and replace the four-way valve if the body is jammed. We also test compressor amp draw to make sure the valve failure did not damage the compressor.
Problem
A partially stuck valve lets refrigerant leak past the piston, creating noise and preventing a clean mode change. Left alone, it can seize completely mid-season.
Our Fix
We diagnose the noise at the valve body with a manifold gauge set and replace the valve before it fails completely. Catching it early usually means a shorter repair and a smaller bill.
Problem
The outdoor coil ices over, airflow drops, and the system loses capacity. Homeowners often mistake this for a defrost control board failure when the valve is the real problem.
Our Fix
We test both the defrost control board and the reversing valve, because they produce nearly identical symptoms. We repair the actual failed part instead of replacing both.
A stuck reversing valve is a mechanical problem, not a mystery. We treat it that way: test first, explain what we found, and fix the actual failure instead of selling a whole new system.
Same-Day Valve Diagnosis
We carry reversing valve bodies and solenoid coils for Carrier, Trane, Lennox, Goodman, and Rheem on every truck. That means most McLean homeowners get a confirmed diagnosis and a repair the same day, not a week of waiting on a part. If your valve is stuck, we can usually have you back in heat or cool within four hours.
Repair Before Replace
A reversing valve replacement McLean runs a fraction of a new heat pump, and we will tell you honestly when a repair makes sense. If the compressor is still pulling correct amps and the coil is clean, a valve swap is the smart money. We only recommend replacement when the compressor or control board is also failing.
Upfront Pricing, No Surprises
You get a flat price for the valve repair before we open the refrigerant circuit. No hourly meter running while we recover R-410A and braze in a new valve. Our 2026 pricing in McLean starts at $480 for a solenoid coil replacement and runs to $1,450 for a full four-way valve swap with filter drier and recharge.
Warrantied Workmanship
Every reversing valve repair we do carries a two-year workmanship warranty on the braze joints and electrical connections, plus the manufacturer's parts warranty. If the valve sticks again or a joint we made leaks, we come back and make it right. That is the standard we hold on every McLean job, from Salona Village to West McLean.
We quote a flat price before we open the refrigerant circuit, so you know the number before we start. Typical 2026 pricing in McLean runs $480 to $750 for a solenoid coil replacement and $950 to $1,450 for a full four-way valve swap with recovery, new filter drier, vacuum, and recharge. The final price depends on your system's refrigerant charge, how accessible the valve is, and whether the part is under warranty. If you have been quoted a full system replacement for a valve problem, get a second opinion first. Most of the time, the valve is the only failed part.
Typical Investment Range
$480 - $1,450 depending on whether we replace the solenoid coil or the full four-way valve body
A valve repair costs a fraction of a new heat pump and typically buys you several more seasons of service. We test first, repair the actual failed part, and back the work with a two-year workmanship warranty.
What changes the price
Coil vs. full valve
A solenoid coil replacement is the least expensive repair and does not require opening the refrigerant circuit. A full four-way valve swap costs more because it involves recovery, brazing, a new filter drier, vacuum, and recharge.
Refrigerant charge size
Larger systems hold more R-410A or R-32, which increases the cost of recovery and recharge. We charge by the pound for any refrigerant that is not recovered and reused.
Valve accessibility
A valve tucked behind a cabinet or buried in a tight outdoor unit takes longer to cut out and braze. We quote the job based on what we see during diagnosis, not a flat book rate.
Parts warranty coverage
If your heat pump is still under the manufacturer's parts warranty, the valve itself may be covered. You pay for labor, refrigerant, and the filter drier. We check the warranty before we order parts.
Additional failed parts
A stuck valve can take out a capacitor, contactor, or defrost control board. If we find a second failed part during diagnosis, we quote it separately so you can decide what to fix now.
Google ★★★★★4.9
Diagnosed a stuck reversing valve that two other companies missed. They tested the coil and the board before quoting anything. Repair was done the same day and the price matched the quote exactly. Highly recommend for heat pump work in McLean.
Yelp ★★★★★4.8
Our heat pump was blowing cold air in January. They came out within three hours, replaced the solenoid coil, and had heat back before dinner. The technician explained what he tested and showed me the readings. Fair price, no pressure to replace the system.
BBB ★★★★★4.9
Full four-way valve replacement on our Trane. They recovered the refrigerant, brazed in the new valve, pulled a vacuum, and recharged by weight. Took about three hours. The system has run through two seasons since with no issues.
Google ★★★★★5.0
Called about a hissing noise at the outdoor unit. Turned out to be a partially stuck reversing valve. They fixed it the same visit and cleaned the coil while they were in there. Honest diagnosis and a clean repair. Will use them for maintenance from now on.
Our technicians hold NATE certification and EPA Section 608 certification, which means they are trained and legally certified to handle R-410A and R-32 refrigerant. We work under a Virginia HVAC contractor license and pull Fairfax County permits when a job requires one. Reversing valves are one of the most misdiagnosed parts on a heat pump, so we train on them specifically: how to read pilot pressure, how to test a solenoid under load, and how to tell a stuck valve from a failing defrost control board. That focus is why we get called after other companies have already replaced a thermostat or a control board with no result.
Real experiences from customers who chose our Heat Pump Reversing Valve Repair services.
“Our heat pump started blowing cold air on the first freezing night in November. Two other companies told us we needed a whole new system. These guys tested the reversing valve, found the solenoid coil was open, and had the part on the truck. Forty-five minutes and $520 later, we had heat. That was two winters ago and it is still running fine.”
Karen M.
Homeowner, Chesterbrook
“The valve on our Trane was stuck in cool mode in the middle of July. House was 82 degrees and climbing. They came out the same afternoon, recovered the refrigerant, swapped the four-way valve, and recharged the system. Took about three hours. The tech showed me the pressure readings in both modes before he left. Fair price, no upsell.”
David R.
Homeowner, West McLean
“We had a hissing noise from the outdoor unit and the heat was weak. Turned out the reversing valve was partially stuck. They diagnosed it with a manifold gauge set and a multimeter, explained exactly what was wrong, and gave us a flat quote. The repair held through the whole winter. I have already recommended them to two neighbors.”
Priya S.
Homeowner, Langley Forest
Real answers to the questions we hear most often from local homeowners and property managers.
General heat pump repair covers the full system when the problem is not isolated to the reversing valve. We diagnose electrical, refrigerant, and airflow faults in one visit so you are not paying for two separate trips to McLean.
View Heat Pump RepairIf your reversing valve failed because the compressor is also worn out, a new system may cost less than repeated repairs. We install Carrier, Trane, Lennox, Mitsubishi Electric, and Daikin heat pumps sized for McLean homes and pull the Fairfax County permit.
View Heat Pump InstallationAnnual maintenance is the cheapest way to avoid a stuck reversing valve. We cycle the valve through all modes, check pilot pressure, clean the coil, and test the defrost control board before the heating season starts in McLean.
View Heat Pump MaintenanceWhen a reversing valve sticks at 2 a.m. in January, you need heat now. We run 24/7 emergency calls across McLean and Fairfax County and carry the coils and valves needed to get you back online the same night.
View Emergency Heat Pump RepairA heat pump that runs but blows cool air is the classic symptom of a stuck reversing valve. We confirm whether the valve, the defrost control board, or the thermostat is at fault before quoting a repair.
View Heat Pump Not HeatingA valve stuck in heat mode will keep your McLean home hot all summer. We test the valve shift, check refrigerant pressures, and repair or replace the valve so cooling comes back the same day.
View Heat Pump Not CoolingCall 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.
Phone
(571) 760-4593Address
7321 Hooking Rd, McLean, VA 22101
Hours
Mon–Fri: 7AM – 7PM
Sat: 8AM – 4PM
Sun: Emergency Only
24/7 Emergency Available
