Homeowners' pick for heating and cooling across Virginia and the Mid-Atlantic

Furnace Replacement in Fairfax, VA

When a heat exchanger cracks or a twenty-year-old unit needs a third repair in two winters, furnace replacement across Fairfax is usually the honest answer. We size the new furnace to the heat loss of your house, confirm the gas line and venting suit the new equipment, and look hard at return air and duct leakage in the crawlspace, because a strong furnace on weak ducts still leaves cold rooms. Talk it through with us by phone or start with the quote form.

Call (888) 365-6280

A real person answers
Open 7 days
Written quote before work starts

Taking calls until 5:00 PM ET

We repair all major brandsCarrier Trane Lennox Goodman Rheem York American Standard Bryant

The symptoms that lead here in Fairfax

The blower is loud and the whole house smells dusty when heat comes on Aging blower assembly plus duct leakage pulling crawlspace air into the supply
We added a room and the heating never kept up after that Load change the existing furnace and duct system were never sized for
The furnace runs constantly and the back bedrooms stay cold Undersized or leaking duct runs, poor return air, or a system that no longer matches the house

What a Furnace Replacement Day Looks Like

We shut off gas and power, disconnect and haul out the old furnace, then set the new one on a level base and rebuild the connections. That includes the supply and return plenum, the gas piping, the venting, the condensate drain on condensing units and the thermostat wiring. Most single-furnace homes are done in a day. In older houses with ducts in vented crawlspaces we allow extra time, because the existing sheet metal and insulation often need repair before the new unit gets connected.

What We Check and Install

Before we quote anything we measure the house, not just the old nameplate. Room sizes, window area, insulation and duct condition all feed the BTU calculation, and plenty of replacements we do are a smaller unit than the one coming out. We inspect the flue, the combustion air path, the return duct sizing and the electrical supply. On installation day we set the blower speeds, check gas pressure and temperature rise, confirm safety controls operate, and walk you through the filter size and thermostat before we leave.

How We Decide Replacement Beats Repair

We look at age, the specific failure and what else is likely next. A cracked heat exchanger or a failed control on a furnace past fifteen years usually points to replacement. A bad igniter or pressure switch on a ten-year-old unit is a heating repair, and we will say so. Repeat breakdowns, rising repair spend, uneven heat and rooms that never catch up in damp shoulder-season weather also weigh in. You get both options in writing, and the decision stays yours.

Fairfax coverage

From Fairfax we also cover Vienna, Burke, Annandale, Centreville, Chantilly, Oakton, Springfield and Falls Church.

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Related furnace installation work in Fairfax

All furnace installation in Fairfax → · Furnace Replacement across the region →

What you get on every job

The quote comes first, in writing

Covering 171 cities across Washington DC, Delaware, Maryland and 5 more.

A real person answers

Open 7 days, 8:00 AM to 5:00 PM ET.

Every major brand, gas and electric

Carrier, Trane, Lennox, Goodman and more. We are not an authorized dealer for any of them.

Furnace Replacement in Fairfax — quick answers

Can I replace only the furnace and keep my AC?

Often yes, if the coil and refrigerant lines are in good shape and match the new blower. We check coil condition and airflow first, because a mismatched pairing can hurt cooling performance later.

Does my ductwork need work too?

Sometimes. In houses with ducts in vented crawlspaces we frequently find disconnected runs, crushed flex and torn insulation. We inspect and report on it, then repair what the new furnace needs to breathe.

How soon can you get to my Fairfax home?

Call us and we will give you a real window rather than a vague promise. During a Fairfax heat wave or the first hard freeze the board fills quickly, so early morning calls usually get seen sooner. While you wait, you can check thermostat batteries and settings, look for a tripped breaker, put in a fresh filter, clear leaves and debris away from the outdoor unit and confirm supply vents are open. If you smell gas, leave the house first, then call 911 or the gas utility, then call us.

How it works

Step 1
Tell us the symptom
Call or fill in the form and describe what changed. Warm air, short cycling, a smell, water near the indoor unit. Details like that help us load the right parts before we leave.
Step 2
We diagnose the whole system
We check the thermostat, the indoor unit, the outdoor unit and the ductwork, including runs in crawlspaces where damp air and loose joints quietly cause weak airflow and long run times.
Step 3
You approve the fix
We explain what failed, what it takes to repair it, and what we would watch next season. Nothing gets replaced without your yes, and we clean up before we leave.

Call (888) 365-6280

A real person answers
Open 7 days
Written quote before work starts

Why homeowners call us

Humidity is our home groundMuggy summers and damp shoulder seasons drive most of the calls we take. We look at moisture and airflow together, not the cooling number alone, because a clammy house often means a sizing or duct problem.
Crawlspace ducts get checkedOlder homes across the region run supply ducts through vented crawlspaces. Crushed flex, disconnected boots and soaked insulation show up constantly, and we get under the house to look instead of guessing from the register.
Heating and cooling bothSame crew for air conditioning repair in July and heating repair in January. We know how your furnace, heat pump and air handler share ducts and a blower, so one visit covers the whole system.
Plain talk on repair or replaceWhen a repair makes sense, we repair it. When a system is failing in ways that will keep costing you, we say so and explain why, then leave the decision with you and your timeline.
All major brands, gas & electricCarrier, Trane, Lennox, Goodman, Rheem, York and more, as an independent company.
Straight answersIf a system is not worth repairing, we say so, often right on the phone.