24/7 Furnace & Heating Repair in Northern Virginia & Maryland

Emergency & Same-Day Furnace Repair

A furnace that dies at 2 a.m. doesn’t care about business hours, and neither do we. AVS offers 24/7 emergency furnace repair across Northern Virginia and Maryland, so a no-heat call at night or on a holiday still gets a technician scheduled.

Same price, any hour: the $90 visit fee and our repair prices are identical at midnight on a Sunday and at noon on a Tuesday.

Price before work: your technician finds the cause and gives you a written price before any work starts.

If your home is losing heat fast, call VA (703) 457-9028 or MD (301) 686-7129 now.

Furnace Not Working? Signs You Need a Technician

Some furnace problems announce themselves loudly; others creep up until the system quits on the coldest night of the year. Call for furnace repair if you notice:

•       Blowing cold air: the burners fire but the vents push cold air, or the fan runs and nothing heats, often an ignition, flame sensor or high-limit switch issue.
•       Won’t turn on at all: no sound, no click, no fan. Try the safe checks below first, then call.
•       Short cycling: the furnace clicks on, runs a few minutes and shuts off, over and over, never finishing a heating cycle.
•       Ignition lockout: the furnace tries to start several times, fails and locks itself out, usually the igniter, flame sensor or gas supply.
•       Burner won’t light: you hear the inducer motor and clicking, but no flame follows.
•       Bangs or booms on startup: delayed ignition can rattle the whole unit; don’t ignore it.
•       Water around the furnace: high-efficiency furnaces make condensate, and a clogged drain or failed pump can leak.
•       Blinking lights on the control board: many furnaces flash a code that points to the fault.

Furnace Noises and What They Usually Mean

When to Stop Using Your Furnace

Some problems are safety issues, not comfort issues. Turn the furnace off and get help right away if you notice:

•       A gas smell (rotten eggs): leave the house without touching switches or the gas valve, then call 911 and your gas company from outside. Schedule a technician only after the home is cleared.
•       A carbon monoxide alarm: get everyone, including pets, outside and call 911.
•       Soot or scorch marks around the furnace or vents.
•       A yellow, lazy or flickering flame instead of a steady blue one.
•       A burning-plastic or electrical smell that doesn’t fade after the first few minutes.

Carbon monoxide can’t be seen or smelled, so the EPA advises working CO alarms anywhere fuel-burning appliances are used.

Safe Checks Before You Call

Before you pay for a visit, five quick checks sometimes bring the heat back. None of them ask you to open panels or touch anything dangerous:

1.     Thermostat: set it to HEAT (not just ON or AUTO-fan), a few degrees above room temperature. Replace the batteries if the display is blank.
2.     Filter: a clogged filter chokes airflow and can trip the high-limit switch. If you can’t remember the last change, swap it.
3.     Furnace switch: near the unit there’s usually a wall switch that looks like a light switch; someone may have flipped it off by accident.
4.     Breaker: check the furnace breaker. If it tripped once, reset it; if it trips again, stop and call us.
5.     Blower door panel: the access door has a safety switch, and the furnace won’t run if the door isn’t fully seated after a filter change.

Don’t open the burner compartment, touch the gas valve or try to relight anything yourself. If the heat still isn’t back, the problem is inside the unit.

What Happens When You Call AVS

6.     You call or send the form: describe the symptom in your own words, like “blowing cold air” or “banging noise”.
7.     Same-day scheduling: our 24/7 dispatch finds the first available window, with evenings and weekends at no extra charge.
8.     $90 diagnostic visit: the technician tests the ignition system, airflow, electrical connections and safety controls.
9.     Written, fixed price: you approve an exact number before any repair begins, and it doesn’t change halfway through.
10. Repair and test: the technician makes the repair and confirms the furnace is heating before leaving.

If the diagnosis points toward replacement instead, we’ll show you the math and quote both options.

Furnace Repairs We Handle

Our technicians repair gas, oil and electric furnaces of every major brand, including the parts that fail most often in Northern Virginia winters:

•       Hot surface igniter: the most common failure; a worn igniter won’t glow hot enough to light the burners.
•       Flame sensor: a dirty or corroded sensor shuts the gas off seconds after ignition, causing short cycling.
•       Draft inducer motor: if it can’t prove exhaust flow, the furnace never lights.
•       Pressure switch: a stuck or failed switch locks out the ignition sequence.
•       Control board: erratic behavior, blinking error codes or a completely dead unit.
•       Blower motor: weak airflow, overheating or no air movement at all.
•       Gas valve: if the valve won’t open, no gas reaches the burners.
•       Heat exchanger inspection: a cracked heat exchanger can leak carbon monoxide; the technician checks it and tells you if the unit is unsafe.
•       Electric furnaces: heating elements, sequencers and relays that knock out the heat.
•       Oil furnaces: we repair oil furnaces too; mention oil when you call so the technician comes prepared.

When a part is obsolete or backordered, or the furnace is past its safe life, we’ll say so and quote both a repair price and a replacement estimate.

Furnace Repair Cost

A furnace repair visit costs $90, with a written price before any work begins. Night, weekend and holiday visits cost exactly the same. From there, the cost depends on the part; these ranges come from our furnace repair cost guide:

Average repair: across all furnace repairs, homeowners spend about $289, and most land between $131 and $458.

Gas furnaces: they have more components, so a gas furnace repair more often runs $375 – $1,200, especially when a motor, valve or board is involved.

No surprises: the price we quote on-site is the price you pay. New customers save $35 on a complete repair; see all current offers.

Repair or Replace Your Furnace? The $5,000 Rule

Here’s the quick math our technicians use at the kitchen table when a repair quote gets serious: multiply your furnace’s age by the repair cost. If the result is over $5,000, replacement is usually the smarter money; if it’s under, repair it.

A third breakdown in one winter, gas bills climbing year over year, or a cracked heat exchanger (a safety issue, not just a cost one) tilt the answer further toward replacement. When replacement makes more sense, our furnace replacement estimates are free, in writing and come with financing options.

Why Northern Virginia & Maryland Homeowners Call AVS

Family-owned since 1991: Anil Sareen of AVS has been featured on ABC7 News.

NATE-certified, licensed in both states: VA HVAC 2705039269A · MD HVAC 520714137895 · MD Home Improvement 4192876.

Repairs backed by a warranty: ask your technician for the terms on your repair before you approve it.

4.8 stars from 354 Google reviews: across Fairfax, Falls Church and Bethesda.

No overtime fees: the same price at 2 a.m. Sunday as Tuesday afternoon.

Every major brand: Trane · Carrier · Lennox · Rheem · Bryant · York · Goodman · Amana · Mitsubishi · American Standard · Ameristar, including York furnaces in Fairfax and across the region.

Keep it running: after the repair, a yearly furnace tune-up or our VIP Maintenance Plan helps prevent the next breakdown.