Open 24/7 Same rate nights, weekends & holidays No overtime fees 4.6 on Google · 282 reviews Call or text (240) 969-4911
Furnace Repair in Leesburg, VA

Based in Leesburg, VA

4.6 from 282 Google reviews

Furnace Repair in Leesburg, VA

Furnace Repair in Leesburg, VA: dual-certified technicians on call 24/7 with no overtime fees, ever.

Call or text (240) 969-4911

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heat exchanger cracks work, professional service in Leesburg, VA

Leesburg Furnace Repair, Diagnosed Right

Brick Street Plumbing Heat & Air handles furnace repair in Leesburg and across Loudoun County, and we're available around the clock with no overtime charges regardless of when you call. When your furnace stops on a January night, 'we'll get there tomorrow' isn't good enough. One call to (240) 969-4911 gets you a dual-certified HVAC technician dispatched fast, equipped to diagnose and repair the problem the same visit. Our 4.6-star rating across 282 Google reviews reflects what Leesburg families tell us repeatedly: we show up, we explain the problem clearly, and we fix it.

Furnace repairs vary widely in scope. A failed ignitor or a tripped limit switch is usually a quick same-visit fix. A cracked heat exchanger, a failing inducer motor, or a broken blower assembly takes more time and parts. What drives cost up is the age of the system, the availability of parts for older units, and whether the repair reveals a deeper underlying problem. Loudoun County has a wide mix of housing stock: newer subdivisions in Brambleton or Broadlands often run high-efficiency condensing furnaces with variable-speed blowers, while older Leesburg properties may have 80 AFUE units with simpler, sturdier components that are cheaper to fix but costlier to run long-term. We'll walk you through the diagnosis, explain exactly what failed and why, and give you an honest assessment of whether a repair makes financial sense or whether a furnace installation is the smarter move for your home. Every job is different, contact Brick Street Plumbing Heat & Air for an accurate estimate.

Common Repairs

Furnace Problems We Fix in Leesburg

Most of these show up during the first cold snap of the season. If your system is doing any of the following, don't wait.

Ignitor and Flame Sensor Failure

A furnace that starts and immediately shuts off usually has a dirty or failed flame sensor. An ignitor that won't glow means no heat at all. Both are common, both are fixable on the first visit.

Blower Motor Problems

If the furnace runs but no air comes out of your vents, the blower motor or its capacitor is usually the culprit. We carry common motor assemblies and capacitors on the truck.

Heat Exchanger Cracks

A cracked heat exchanger is a carbon monoxide risk. We test for it on every diagnostic call. If we find one, we'll tell you plainly what your options are, including whether the unit warrants replacement.

Thermostat and Control Board Issues

Sometimes the furnace is fine and the problem is the signal telling it to run. We diagnose thermostat wiring faults and control board failures and can replace both.

Inducer Motor and Pressure Switch

Condensing furnaces have an inducer motor that clears combustion gases before ignition. When it fails, the pressure switch won't close and the furnace locks out. This is a common fault in mid-efficiency units over 10 years old.

Limit Switch Trips and Overheating

A furnace that keeps shutting off after running a few minutes has usually tripped its high-limit switch, often due to a clogged filter or restricted airflow. We clear the root cause, not just reset the switch.

How We Handle a Furnace Repair Call

No guessing. No parts-swapping until something works. Here's the actual process.

  1. Systematic Diagnosis First

    We start with the full system: heat exchanger, combustion, electrical, airflow, and controls. We don't replace parts before we understand why they failed.

  2. Clear Explanation of the Problem

    We show you what we found and explain what it means in plain terms. You'll know exactly what failed, what caused it, and what it takes to fix it before any work begins.

  3. Repair or Honest Recommendation

    If repair is the right call, we do it. If the unit is aging, inefficient, or the repair cost approaches replacement value, we'll tell you that too. You decide.

Repair vs. Replace: How to Think About It

The honest answer depends on three things: the age of the unit, the cost of the repair relative to replacement, and the efficiency of your current system. Furnaces typically last 15 to 20 years. If yours is under 10 and the repair is a single component failure, fix it. If it's pushing 15 or older and you're looking at a heat exchanger, inducer motor, or control board, the math often favors replacement, especially given how much more efficient modern units are. A new high-efficiency furnace with an AFUE rating above 96% can cut your heating bills significantly compared to an older 80% unit, and in a Northern Virginia winter that runs hard from November through March, that difference adds up fast. We don't have a financial incentive to push you toward replacement if repair is the right move. If we think you should replace it, we'll say so and explain exactly why. And if you want to explore a new system, we can walk you through HVAC installation options for your home's layout and size.
ignitor and flame sensor failure work, professional service in Leesburg, VA

Our Commitment on Every Furnace Call

What you get every time you call Brick Street for furnace repair.

24/7 availability, no overtime fees
Midnight call or Saturday morning, the rate doesn't change.
Dual-certified HVAC technicians
Factory-certified and licensed professionals on every job.
Full diagnostic before any repair
We find the root cause, not just the symptom.
Straight answers on repair vs. replacement
No pressure, no upselling, just an honest assessment of your system.

Furnace Repair Questions Leesburg Homeowners Ask

What are the most common signs a furnace needs repair?
Short-cycling (the furnace starts and shuts off quickly), a pilot or ignitor that won't stay lit, weak airflow from registers, a yellow or flickering burner flame instead of blue, and unusual sounds like banging, rattling, or squealing are the most common warning signs. Any of these points to a component problem. A yellow burner flame in particular can indicate incomplete combustion and should be addressed before running the system further.
How often should I have my furnace serviced in Leesburg?
Once a year, ideally in September or early October before the heating season starts. Loudoun County winters run cold from late November through February, and a furnace that goes into that stretch without a recent inspection is more likely to fail mid-season when demand on the system is highest. Annual maintenance catches ignitor wear, heat exchanger stress, and airflow restrictions before they become repair calls. Pair it with an HVAC inspection if you haven't had the full system checked recently.
Should I repair or replace my furnace if it's over 15 years old?
That depends on what failed. A 16-year-old furnace with a cracked heat exchanger is nearly always a replacement scenario: the part is expensive, the repair is labor-intensive, and you're investing that money into a system that's near the end of its useful life. A 16-year-old furnace with a failed capacitor or flame sensor is a different conversation, since those are cheap fixes. We'll give you a straight assessment on the spot and let you decide without any pressure.
What does a furnace safety inspection actually check?
A thorough safety inspection covers the heat exchanger for cracks or corrosion (the primary carbon monoxide risk), the burner assembly and combustion quality, the flue and venting path, the limit switch and pressure switch operation, the blower motor and belt condition, electrical connections, and the thermostat calibration. It also includes a filter check and an airflow assessment. Skipping this in Northern Virginia, where furnaces run hard for four to five months straight, shortens the system's life.
What does furnace AFUE mean and does it affect my repair decision?
AFUE stands for Annual Fuel Utilization Efficiency. It measures what percentage of the fuel the furnace burns actually becomes heat in your home. An 80 AFUE furnace wastes 20 cents of every dollar in exhaust gases. A 96 AFUE unit wastes only 4 cents. If your current furnace is a low-efficiency 80% unit and it needs a major repair, upgrading to a high-efficiency model can offset a significant portion of the replacement cost through lower monthly gas bills, particularly relevant in a Loudoun County winter that runs from November through March.
Can a dirty air filter actually cause furnace failure?
Yes, and it's more common than people expect. A clogged filter restricts airflow across the heat exchanger, causing the unit to overheat and trip the high-limit switch. The furnace shuts down as a safety measure. If it trips repeatedly, the limit switch can fail permanently, and prolonged overheating stresses the heat exchanger itself. A filter that should cost a few dollars to replace ends up driving a repair call. We check filter condition on every visit and won't pretend the system is fine if a clogged filter is the underlying problem.
What does a furnace safety inspection check?
A thorough inspection covers the heat exchanger for cracks, the burner and combustion quality, the flue and venting path, limit switch and pressure switch operation, blower motor condition, electrical connections, thermostat calibration, and airflow. It also includes a filter check. In a Northern Virginia home where the furnace runs hard for four to five months, skipping this annually shortens the system's life and raises the risk of carbon monoxide issues.
What does furnace AFUE mean and why does it matter for Leesburg homeowners?
AFUE is Annual Fuel Utilization Efficiency, the percentage of fuel burned that actually becomes heat in your home. An 80 AFUE furnace wastes 20% of its fuel. A 96 AFUE unit wastes only 4%. For a Loudoun County home running heat from November through March, that gap shows up on your gas bill every month. When an older low-efficiency unit needs a major repair, the efficiency comparison is a real factor in the repair-versus-replace decision.
Can a dirty air filter cause a furnace to stop working?
Yes, and it happens more than people realize. A clogged filter blocks airflow across the heat exchanger, causes the furnace to overheat, and trips the high-limit switch. The furnace shuts down as a safety measure. Repeated trips can burn out the limit switch permanently and stress the heat exchanger. We check filter condition on every service call because ignoring a dirty filter drives repair bills that cost far more than the filter itself.

Furnace Repair Across Loudoun County

We run furnace repair calls throughout Leesburg and the surrounding area. If you're in Loudoun County, we cover you. Emergency call at 2am? Same rate. No surprises.

In the field

A look at our work

blower motor problems work, professional service in Leesburg, VA
thermostat and control board issues work, professional service in Leesburg, VA

Furnace Not Working? Call Now.

  • 282 Loudoun County homeowners have trusted Brick Street
  • Your heat should be on tonight

We're available 24/7 with no overtime fees. Call (240) 969-4911 and a dual-certified technician will get to you fast. If you'd rather schedule online, use the form below and we'll call you back quickly.

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(240) 969-4911

Based in Leesburg, VA.

4.6 from 282 Google reviews
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