Furnace Repair in Fairfax, VA
Serving Fairfax County Homeowners Since 1936
When your furnace stops working, you need someone who knows Fairfax homes and can get there fast. Long's Corporation has provided residential home services across Fairfax County and Northern Virginia since 1936. Our technicians are fully trained and equipped to diagnose and repair gas furnaces, and same-day service is available when scheduling permits.
We work exclusively for homeowners. No commercial contracts, no divided priorities. Every repair decision we make is focused on what’s right for your home and your budget.
Call (571) 470-5898 to schedule furnace repair in Fairfax. Free estimates are available, and our team is reachable by phone 24/7 for questions and guidance.Why Fairfax Homeowners Trust Long's Corporation
Choosing a furnace repair company comes down to trust. We’re a third-generation, women-owned business with an A+ BBB rating maintained since 1998 and a 100% Satisfaction Guarantee on every job. That reputation wasn’t built on one good season. It was earned over decades of showing up, doing the work right, and being honest with homeowners about what their system actually needs.
Our technicians don’t push repairs or replacements you don’t need. You get a clear picture of what’s happening, what it takes to fix it, and what it will cost before any work begins. We check heat exchanger condition on every furnace service call.
Financing options are available to make repairs manageable, and our team includes Spanish-speaking support for homeowners who prefer it.
Your home deserves reliable comfort and dependable plumbing. Our financing options help make repairs, replacements, and installations easier to manage. Apply today and take the next step toward a more comfortable home.
Heat Exchanger Safety: What We Check on Every Visit
The heat exchanger in a gas furnace does one critical job: it keeps combustion gases, including carbon monoxide, separated from the household air circulating through your duct system. A crack in the exchanger breaks that separation. Because carbon monoxide is odorless and builds up gradually without any visible sign, a cracked exchanger is one of the more serious furnace problems a homeowner can face without knowing it.
Cracks are most common in older furnaces and in systems that have run with restricted airflow for an extended period. Warning signs include a flickering yellow flame instead of a steady blue one, excessive soot inside the unit, or a strong unpleasant odor near the furnace. Working CO detectors are important in any home with a gas furnace.
We check heat exchanger condition on every furnace service call. That’s not an upsell. It’s how we do the job.
How Restricted Airflow Damages Furnaces Over Time
Restricted airflow is one of the most overlooked causes of furnace damage. When a clogged filter, blocked return vent, or closed supply register limits airflow, the heat exchanger runs hotter than it was designed to. Repeated thermal stress causes the metal to expand and contract beyond its tolerance, and over time, that’s one of the most common ways cracks develop.
A clean filter and clear vents cost very little to maintain and go a long way toward preventing expensive repairs. In older Fairfax homes where ductwork has been added to or modified over the years, airflow imbalances aren’t always obvious from a surface inspection. We look at the full airflow picture on every service call, not just the component presenting the symptom, because fixing the symptom without addressing the cause tends to bring the same problem back.
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"Honest Company"
We switched to Long's Corporation from another company after a family member recommended Long's, and I'm so glad we did. They provided quick, caring, thorough, and honest service at fair and affordable prices.
Whitney H. -
"10 Stars"
Long’s Corporation is the definition of high quality service. Their technicians are always courteous, efficient, and professional. If I could give a 10 star review, I would!
Katelyn M.
Why Choose Us?
Benefits of Working With an Expert Team
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Immediate, Same-Day Service
Some things can't wait. We can come see you today!
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100% Satisfaction GuaranteeWe never leave you unhappy! We guarantee it.
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Hablamos EspañolOur team is proud to help with Spanish services.
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Women-Owned Company
Three generations of woman-owned leadership.
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Affordable Financing Options
We make services affordable with financing options.
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24/7 Call Support Available
We're here to help you whenever you need us.
What to Expect When You Call Long's Corporation
A furnace repair visit starts with a full diagnostic. We identify the root cause, not just the presenting symptom, and explain the findings clearly before any work begins. You’ll know what’s wrong, what it takes to fix it, and what it will cost. No pressure, no inflated recommendations.
Parts and labor are covered by warranty, and financing options are available if the repair cost is more than you expected. Same-day service is available when scheduling permits, so you’re not left waiting through a cold night if we can help it. Our team is reachable by phone 24/7 for questions and guidance, even outside of service hours.
We serve Fairfax County and Northern Virginia. Call (571) 470-5898 or schedule online and we can give you a straight answer.
