Leesburg HVAC Company handles heating and cooling for homes, rental properties, and commercial buildings throughout Leesburg and the rest of Loudoun County. Whether the furnace stopped working overnight, the air conditioner is blowing warm air in July, or a full system replacement is overdue, we scope the job on the call and get the right work scheduled. Built for homeowners. Ready for property managers. Ready for your system.
From AC repair and heat pump service to new system installation and emergency no-heat calls, we cover the full range of residential and commercial HVAC work.
Call (571) 495-3355 for a quote.
A home that heats and cools right is a comfortable home, and getting there starts with knowing what the system actually needs. We handle AC repair and service, heating and furnace repair, heat pump service, system installation and replacement, ductwork, thermostats, indoor air quality, seasonal maintenance, and emergency calls. That covers most of what a homeowner or property manager in this area will ever need.
When you call, the scope and the price are settled before anything is scheduled. We keep you informed from diagnosis to final test, so there are no gaps between what you were told on the phone and what happens at the property. Pick up the phone and we'll handle the system.
When an air conditioner stops cooling, starts short cycling, or runs constantly without reaching the set temperature, something in the system needs attention. Common causes include refrigerant loss, a dirty evaporator coil, a failing condenser, or a compressor drawing too much current. Each of those starts with a diagnostic, not a parts order.
We check refrigerant levels, inspect the condenser and evaporator coil, test airflow, and look at how the system is cycling before anything is quoted. Uneven temperatures from room to room often point to an airflow issue rather than the unit itself, and that distinction matters for what gets repaired.
Spring AC tune-ups are a good way to catch small problems before the heat arrives. A seasonal check covers refrigerant charge, coil condition, electrical connections on the equipment, and thermostat calibration, so the system is ready before it is needed most.
A furnace blowing cold air, short cycling, making a banging or rattling noise, or simply not turning on at all is a call worth making before the temperature drops further. Gas furnace problems in Virginia often trace back to the ignition system, the heat exchanger, or a dirty flame sensor, and a proper inspection covers all three.
A furnace inspection includes a heat exchanger check, ignition system test, airflow measurement, and thermostat calibration. We are honest about when a system still has life in it, and we will say so plainly rather than push a replacement when a repair is the right answer. Fall furnace tune-ups are a practical way to confirm the system is ready before the first cold snap.
Heat pumps handle both heating and cooling, which means a problem in either mode is a year-round concern in Virginia's climate. A heat pump that is not heating in January and a heat pump that is not cooling in August are different symptoms, but both start with the same diagnostic process: checking refrigerant charge, testing the reversing valve, inspecting coils, and measuring airflow.
Short cycling, unusual noise, or a system that runs but does not reach the set temperature are all worth a call. Heat pump tune-ups cover the same ground as the diagnostic but are scheduled before a problem develops, which tends to catch wear before it becomes a failure.
Mini-split systems are a practical solution for additions, sunrooms, converted garages, and older homes where running new ductwork is not feasible. A ductless installation involves mounting the indoor air handler, placing the outdoor unit, and making the refrigerant and low-voltage control connections to the equipment.
When a mini-split is not cooling or not heating, the diagnostic covers refrigerant charge, the indoor coil, the outdoor unit, and the control board. Most ductless repairs follow the same process as a standard heat pump service call, with the added step of checking the line set and the wall penetration for any issues introduced at installation.
Leaky or undersized ductwork shows up as uneven heating and cooling long before it shows up on an energy bill. A room that never quite reaches the set temperature, or one that gets too warm while the rest of the house is comfortable, is often a duct problem rather than an equipment problem.
We inspect for leaks, gaps at connections, and sections that have collapsed or separated. Duct sealing closes those gaps and restores airflow to the parts of the house that have been short-changed. Where ductwork is too far gone to seal, replacement is the more durable fix. Reach out and we'll start at the unit.
A thermostat that is not responding, reading the wrong temperature, or failing to trigger the system at the right time affects the whole house. Replacing a failed thermostat is a straightforward job. Installing a smart thermostat or a zoning system is a larger project, but the result is finer control over which parts of the home are conditioned and when.
Zoning systems split the house into independently controlled areas, which helps with multi-story homes where heat rises and the upstairs runs warmer than the downstairs. We handle the thermostat and control-side installation, and we confirm compatibility with the existing heating and cooling equipment before anything is ordered.
Whole-home air filtration, air purifiers, and air scrubbers all attach to the HVAC system and treat the air as it moves through the equipment. The right choice depends on what the home needs: a high-efficiency filter addresses particulates, a UV air purifier targets biological contaminants in the airstream, and a whole-home air scrubber works continuously as the system runs.
A visit covers equipment selection, installation, and a walkthrough of what the system does and how to maintain it. We confirm that the added equipment is compatible with the existing air handler and that airflow is not restricted after installation.
No heat in January and no cooling in August are both situations that need attention the same day. We take emergency calls every day from 6:00 AM to 9:30 PM, covering Leesburg and the surrounding area in Loudoun County.
The person who answers the phone can walk through the symptoms with you. That conversation helps narrow down whether the issue is the thermostat, the air handler, the outdoor unit, or something else, so the visit starts in the right place. We do not promise a specific arrival window, but we confirm what the schedule allows when you call.
Property managers and landlords need HVAC work handled efficiently, with clear communication about what was found and what was done. We work with rental properties, multi-unit buildings, and commercial spaces throughout Loudoun County, and we handle the call the same way every time: scope confirmed on the phone, price given before anything is scheduled.
Commercial HVAC repair, commercial maintenance, and multi-unit inspections all follow the same diagnostic process as a residential call. Readings shared at the end of a maintenance visit give property managers a written record of what was checked and what the system measured, which is useful for maintenance logs and for planning ahead on aging equipment.
AC repair costs, furnace replacement costs, and heat pump installation costs all depend on what the system needs, the size of the equipment, and the specifics of the installation. None of those can be settled without knowing the job, which is why the price is confirmed on the call after the scope is clear.
When you call, we go through what the service covers, what the diagnostic involves, and what the rate is before anything is booked. If you have already had a quote from somewhere else and want a second opinion, that is a reasonable place to start. We'll go through what the service covers before it is booked.
Loudoun County runs through genuine four-season weather: humid summers that push air conditioners hard and cold winters that test heating systems. The three services below come up often in this area because the climate calls for them.
A full system replacement involves removing the old equipment, selecting a properly sized replacement, and installing the new unit. In Loudoun County, where summers are hot and humid and winters bring real cold, systems work through both extremes every year. Equipment that is aging tends to show it on both ends of the season.
Sizing matched to the home matters here. An oversized unit short cycles and leaves humidity behind. An undersized unit runs constantly and still does not reach the set temperature. We know this area. We know these systems. Sizing matched to the home.
Virginia's climate sits in a range where heat pumps perform well through most of the heating season, and they handle cooling without a separate system. A heat pump installation covers the outdoor unit, the air handler or coil, the refrigerant line set, and the low-voltage control wiring to the equipment. Replacing an older system with a heat pump is a common upgrade in this part of the state, particularly where gas is not available or where a homeowner wants a single system for both seasons.
Loudoun County summers bring genuine humidity load, and a central air conditioner alone does not always pull enough moisture from the air to keep the home comfortable. A whole-home dehumidifier installs in line with the HVAC system and runs independently of the cooling cycle, which means it can manage humidity even when the air conditioner is not running. The installation involves connecting the unit to the ductwork, setting the control to the target humidity level, and confirming that the condensate drain is properly routed to the equipment's drain connection.
Doing HVAC work right matters, and we'll help you get it right, starting with a maintenance visit before the heavy-use season begins. A spring AC tune-up and a fall furnace tune-up cover the equipment at the point in the year when it matters most.
A tune-up visit includes a filter check, refrigerant level measurement, electrical connection inspection on the equipment, thermostat calibration, and an airflow check at the supply and return. Readings shared at the end of a maintenance visit give you a clear picture of where the system stands, what was adjusted, and whether anything warrants attention before the next season.
Annual maintenance does not guarantee that a system will not fail, but it does catch the conditions that lead to failure, and that is worth the call.
We work throughout Leesburg and the surrounding towns in Loudoun County. That includes Ashburn, Sterling, Purcellville, Middleburg, Hamilton, Round Hill, Lansdowne, and Broadlands. If you are not sure whether your address falls in our service area, call and we will confirm it on the phone.
Loudoun County covers a wide range of housing stock, from newer construction in Ashburn and Broadlands to older homes in Purcellville and Middleburg. The HVAC work varies accordingly: newer homes often have systems due for their first major service, while older properties may have equipment that has been running longer than it should.
A bang at startup on a gas furnace is often a delayed ignition, where gas builds up briefly before the burner lights. That is worth diagnosing promptly because repeated delayed ignitions can stress the heat exchanger over time. A rattle is more commonly a loose panel, a failing blower wheel, or debris in the system, and the diagnostic starts by isolating where the noise is coming from.
An air conditioner that is struggling usually shows it in a few ways before it stops working entirely: short cycling, running continuously without reaching the set temperature, ice forming on the evaporator coil, or refrigerant lines that are sweating more than usual. Unusual noises from the compressor or condenser fan are also worth attention. Any of those symptoms is a reason to call before the system stops working on a hot day.
After any repair or installation, the system is run through a full heating or cooling cycle to confirm it is operating correctly. We check that the thermostat is triggering the system as expected, that airflow is reaching the supply registers, and that the equipment is running within normal operating parameters. Readings from that final test are shared before the visit closes.
Equipment problems tend to affect the whole house: the system runs but the temperature does not reach the setpoint, or it short cycles before the house is comfortable. Ductwork problems tend to be room-specific: one area is consistently too warm or too cool while the rest of the house is fine, or airflow at certain registers is noticeably weaker than others. We check both during a diagnostic, because the two problems sometimes occur together.
Additional charges come from parts or labor beyond what the initial diagnostic covers. If the visit reveals a second failed component, or if the repair requires more time than a standard call, that is discussed before the additional work proceeds. Nothing is added to the scope without a conversation first.
If the furnace is out in cold weather, close off rooms you are not using to retain heat, and use blankets or space heaters if you have them. If the AC is out in summer, close blinds on the sun-facing side of the house to reduce heat gain. Do not repeatedly cycle the system on and off if it is tripping a safety control, because that can mask what the control is responding to and make the diagnostic harder.
A heat pump installation covers the outdoor unit, the indoor air handler or coil, the refrigerant line set connecting them, and the low-voltage control wiring to the equipment. The unit is sized to the home's actual heating and cooling load before anything is ordered. After installation, both heating and cooling modes are tested to confirm the system is operating correctly before the visit ends.
Virginia's climate puts real demand on both ends of a heat pump's range. A unit that is oversized for the home will short cycle in cooling mode and leave humidity in the air. A unit that is undersized will run continuously in heating mode when temperatures drop and still not reach the set temperature. Sizing matched to the home's actual load is what makes the system perform through both seasons.
A whole-home dehumidifier makes sense when the air conditioner is running normally but the house still feels heavy and uncomfortable during Loudoun County's humid summers. A central air system removes some moisture as a byproduct of cooling, but it cannot always keep up with the humidity load when the dew point is high. A whole-home unit installs in line with the HVAC system and manages humidity independently of the cooling cycle.
A furnace that is cycling on and off frequently, producing uneven heat, requiring repeated repairs in the same season, or running the blower continuously without heating the air is showing signs of wear. A cracked heat exchanger is a more serious finding that affects both performance and safety, and it comes up more often in older equipment. When repair costs start adding up relative to the system's age, replacement is worth discussing.
Conditioned air that leaks out of the duct system before it reaches the living space is air the equipment worked to condition and the homeowner paid to heat or cool. Undersized ducts restrict airflow and force the equipment to work harder to move the same volume of air. Both problems show up as higher energy use and uneven comfort, and neither gets better by adjusting the thermostat.
A straightforward repair call, like a failed capacitor or a dirty flame sensor, often takes an hour to an hour and a half once the diagnostic is complete. A full system replacement or a ductwork project takes longer and may run most of a day depending on the scope. The time involved is part of what gets discussed when the job is scoped on the call.
Calling an HVAC company doesn't have to be stressful, and it does not have to take long. You call, we go through what the system is doing, and you get the rate before anything is scheduled. We know this area. We know these systems. Sizing matched to the home.
We are available every day from 6:00 AM to 9:30 PM.
Call (571) 495-3355 for a quote on any heating or cooling job in Leesburg or the surrounding area.
Every heating and cooling job we handle in Leesburg starts the same way: a call where we go through what the system is doing, scope the work, and give you a price before anything is scheduled. The table below covers the full range of HVAC services we offer in Leesburg and across Loudoun County. Use it to find what fits your situation, then call and we will walk through the details with you.
| System Service | What the Service Includes | Common Needs | Things to Know |
|---|---|---|---|
| AC Repair & Service | Refrigerant level check, Coil and condenser inspection, Airflow and cycling test, Thermostat calibration | Homeowners dealing with warm air, short cycling, or a unit that runs but never reaches the set temperature | Spring is the best time to catch small AC problems before the heat arrives and demand is at its peak |
| Heating & Furnace Repair | Heat exchanger inspection, Ignition system test, Flame sensor check, Airflow measurement | Any home or rental property where the furnace is blowing cold air, short cycling, or making unusual noises | A fall tune-up is the practical time to confirm the furnace is ready before the first cold snap hits Loudoun County |
| Emergency HVAC Service | No-heat and no-cool calls, symptom walkthrough on the phone, diagnostic visit scheduling, urgent requests handled when the situation cannot wait. | Any home or property where the heating or cooling system has stopped working and the situation cannot wait | Talking through the symptoms on the call helps narrow down whether the issue is the thermostat, the air handler, or the outdoor unit before the visit starts |
| Heat Pump Installation | Outdoor unit and air handler placement, Refrigerant line set connection, Low-voltage control wiring, Heating and cooling mode verification | Homeowners upgrading from a single-season system or replacing older equipment with one unit that handles both seasons | Heat pumps perform well through most of Virginia's heating season and eliminate the need for a separate cooling system |
| Heat Pump Repair & Service | Refrigerant charge test, Reversing valve inspection, Coil and airflow check, Heating and cooling mode test | Homes relying on a heat pump for both heating and cooling where either mode is underperforming | Virginia's climate puts heat pumps through both extremes every year, so a problem in one mode often shows up in the other |
| Whole-Home Dehumidification & Humidity Control | In-line dehumidifier installation, Humidity control setting, Condensate drain routing, Compatibility check with existing air handler | Loudoun County homes where the AC runs normally but the air still feels heavy and uncomfortable during summer | A whole-home unit manages humidity independently of the cooling cycle, so it works even when the AC is not running |
| Ductwork Repair & Sealing | Leak and gap inspection, Duct sealing at connections, Collapsed section identification, Airflow check after sealing | Homes with one room that is consistently too warm or too cool while the rest of the house is comfortable | Leaky ducts make the equipment work harder and still leave parts of the house short-changed on conditioned air |
| Thermostat & Smart-Control Installation | Failed thermostat replacement, Smart thermostat installation, Zoning system setup, Compatibility check with existing equipment | Homeowners who want finer control over comfort by room or floor, or whose current thermostat is not triggering the system correctly | Multi-story homes in Leesburg often benefit from zoning because heat rises and the upstairs runs warmer than the downstairs |
| Indoor Air Quality & Air Filtration | Whole-home filter or purifier installation, UV air purifier setup, Air scrubber installation, Airflow check after installation | Households where dust, allergens, or biological contaminants in the airstream are a concern | We confirm that added filtration equipment does not restrict airflow through the air handler before the visit ends |
| Seasonal Maintenance & Tune-Ups | Filter and coil check, Refrigerant level measurement, Electrical connection inspection on the equipment, Thermostat calibration and airflow test | Homeowners and property managers who want a written record of system condition before the heavy-use season begins | Readings are shared at the end of the visit so you know exactly where the system stands and what, if anything, warrants attention |
| Full System Installation & ReplacementMost Popular | Load calculation and sizing, Old equipment removal, New unit installation, Full system test in both modes | Homeowners or property managers replacing aging equipment that is no longer keeping up with the season | Sizing matched to the home prevents short cycling in summer and insufficient heat in winter, both of which are common with oversized or undersized units |
How often should we schedule maintenance and tune-ups for our HVAC system?
Most systems benefit from two visits a year: a spring tune-up before the cooling season and a fall tune-up before heating season. Each visit covers refrigerant levels, coil condition, electrical connections on the equipment, thermostat calibration, and airflow. Catching wear at those points tends to prevent the kind of failure that happens on the hottest day in July or the coldest night in January.
What are the signs of a refrigerant or airflow problem?
A refrigerant problem usually shows up as an AC that runs constantly but never reaches the set temperature, ice forming on the evaporator coil, or refrigerant lines that are sweating more than usual. An airflow problem tends to show up as weak output at certain registers, a system that short cycles, or a room that stays warm even when the rest of the house is comfortable. Both start with a diagnostic rather than a parts order, because the symptoms overlap and the fix depends on what the inspection finds.
What does a seasonal tune-up actually cover?
A tune-up visit includes a filter check, refrigerant level measurement, inspection of electrical connections on the equipment, thermostat calibration, and an airflow check at the supply and return registers. We share the readings at the end of the visit so you have a clear picture of where the system stands. The goal is to find the conditions that lead to failure before they become one, not just to run the system and call it done.
System Checked Before Parts Are Quoted
We run a full diagnostic before recommending any repair or replacement. The inspection tells us what the system actually needs, and that is what gets quoted.
What causes a system to short-cycle?
Short cycling, where the system turns on and off more frequently than normal without completing a full heating or cooling cycle, has several common causes. An oversized unit is one of the most frequent: a system that is too large for the home satisfies the thermostat quickly, shuts off, and then kicks back on before the house has actually stabilized. Other causes include a dirty evaporator coil, low refrigerant charge, a failing thermostat, or a safety control tripping repeatedly. The diagnostic identifies which one applies before any repair is quoted.
How do I choose between repairing and replacing an older system?
The honest answer depends on the age of the equipment, what the repair costs relative to a replacement, and how the system has been performing. A repair that addresses a single failed component on a system that is otherwise in good shape is usually the right call. When repair costs start adding up across the same season, or when the equipment is old enough that efficiency and reliability are both declining, replacement is worth discussing. We are straightforward about where a system stands and will say so rather than push a replacement when a repair is the right answer.
Why is one room hotter or colder than the rest of the house?
Room-specific comfort problems usually point to ductwork rather than the equipment itself. A duct that has separated at a connection, collapsed, or was undersized from the start delivers less conditioned air to that part of the house while the rest of the system runs normally. Multi-story homes in Leesburg also deal with heat stratification, where the upstairs runs warmer than the downstairs regardless of duct condition. A zoning system or a ductwork inspection, depending on the situation, is where the diagnostic starts.
Findings Written Up After The Visit
Readings and findings are shared at the end of every maintenance visit, giving homeowners and property managers a clear record of what was checked and what the system measured.
How does a dirty filter or coil affect system performance?
A clogged filter restricts airflow through the air handler, which forces the equipment to work harder to move the same volume of air and can cause the evaporator coil to freeze. A dirty evaporator coil reduces the system's ability to transfer heat, which means the AC runs longer to reach the set temperature and the refrigerant charge reads low even when it is not. Both problems are caught during a tune-up visit and corrected before they become a repair call.
What does a thermostat or smart-control upgrade involve?
Replacing a failed thermostat is a straightforward job: we confirm compatibility with the existing heating and cooling equipment, remove the old unit, install the new one, and verify that the system responds correctly in both heating and cooling modes. A smart thermostat or zoning system is a larger project. Zoning splits the home into independently controlled areas, which is useful for multi-story homes or properties with rooms that are consistently over- or under-conditioned. Compatibility with the existing equipment is confirmed before anything is ordered.
Emergency No-Heat and No-Cool Calls Handled
We take emergency calls every day from 6:00 AM to 9:30 PM. Talking through the symptoms on the call helps narrow down the issue before the visit starts.
How do I know if my system's compressor or blower motor is failing?
A failing compressor often shows up as an AC that runs but does not cool, a system that trips the circuit breaker repeatedly, or unusual grinding or clanking from the outdoor unit. A failing blower motor tends to produce weak or no airflow at the registers even when the system appears to be running. Both are identified during a diagnostic that checks the electrical draw on the motor or compressor, airflow at the supply and return, and how the system is cycling. We go through what the inspection finds before any repair is quoted.
How does indoor humidity affect comfort in Loudoun County summers?
Loudoun County summers bring genuine humidity load, and a central air conditioner removes moisture as a byproduct of cooling but cannot always keep up when the dew point is high. A house that feels heavy and uncomfortable even when the thermostat reads the right temperature is often a humidity problem rather than a temperature problem. A whole-home dehumidifier installs in line with the HVAC system and manages humidity independently of the cooling cycle, which means it works even on days when the AC is not running.
How long does a full system replacement typically take?
A standard residential system replacement, covering the outdoor unit and the air handler or coil, usually takes most of a day. The time depends on the complexity of the installation, whether any ductwork connections need adjustment, and how accessible the equipment is. The scope and the expected time involved are part of what gets discussed when the job is confirmed on the call, so you know what to expect before the visit starts.
Call (571) 495-3355 and we will go through what your system is doing, confirm what the service covers, and give you a price before anything is scheduled.
(571) 495-3355