Boiler Repair & Maintenance in Northern Virginia & Maryland

Boiler not heating, radiators staying cold or the pressure gauge dropping? AVS Heating and Air Conditioning provides boiler repair and boiler maintenance for homes and businesses across Northern Virginia and Maryland. Our technicians find the cause first and explain your options before any work begins.

Need help today? Virginia: 703-457-9028. Maryland: 301-686-7129. Our emergency line is open any hour, and same-day visits are offered.

Residential and Commercial Boilers · All Major Brands · Same-Day Service · 24/7 Emergency Line

Boiler Service at a Glance

Boilers we repair — residential and commercial boilers, all major brands.

Same-day service — offered, with the earliest available time depending on our schedule and parts.

Emergency line — open any hour, every day of the year.

Repair price — request it before the repair starts, and decide with the number in hand.

Yearly maintenance — recommended before the heating season. Ask about our VIP maintenance plan.

If a replacement makes more sense — if your boiler is near the end of its life, we say so and explain your options. Financing is available.

Boiler Not Heating? Common Signs and Causes

A boiler that isn’t heating usually has a problem with the thermostat call, ignition, gas supply, water pressure or circulation. Cold radiators or baseboards often point to trapped air, the circulator pump or the zone valves, while a dropping pressure gauge suggests a leak. Note what you see and call AVS for boiler repair.

Before We Arrive: What’s Safe to Check

While you wait for the technician, a few checks are safe for any homeowner, and the answers help us find the cause faster.

Thermostat Make sure it is set to heat and to a temperature above the room reading.

Power Confirm the boiler’s power switch and its breaker are on.

Pressure gauge Write down the reading and give it to us when you call.

Lockouts If the boiler keeps locking out, don’t keep resetting it.

Gas smell or a carbon monoxide alarm If you smell gas or a carbon monoxide alarm goes off, put safety ahead of the repair. Leave the house and phone your gas utility or 911 once you are outdoors.

What Happens on a Boiler Repair Visit

A boiler repair visit with AVS follows four steps, so you always know what comes next.

Diagnosis The technician checks the controls, ignition, water pressure, circulation, venting and safety devices to find the cause.

Explanation We walk you through the fault and the repair it needs. Ask for the price at this point, before you approve anything.

Repair With your approval, the repair is made and the boiler is tested through a full heating cycle.

Advice When a repair no longer makes sense for an aging boiler, we tell you straight and lay out your options.

What Does Boiler Repair Cost?

According to Fixr, most homeowners pay between $150 and $750 for a boiler repair, with a national average of about $450. These are national figures, not AVS prices, so your boiler repair cost in Northern Virginia depends on what the technician finds.

The part that failed A simple ignition repair costs far less than a new circulator pump.

Boiler type and age Older boilers tend to cost more to repair, and their parts can be harder to find.

Your AVS price It comes from the fault we find on your boiler, and you hear it before you approve the repair.

Yearly Boiler Maintenance

An annual boiler service before the heating season catches small problems early, keeps the boiler efficient and helps the equipment last longer. Skipping it can bring costly repairs and safety hazards, as our guide on what happens if a boiler is not serviced explains.

Burner and ignition The parts that start the boiler and keep the flame steady.

Water pressure and expansion tank The readings and the component that absorbs pressure changes.

Circulator pump and zone valves The parts that move hot water to each room.

Venting and safety controls The path for exhaust and the devices that shut the boiler down when something is wrong.

Full heating test A complete run to confirm the boiler heats properly.

Our VIP maintenance plan includes two maintenance and safety inspections a year, priority service when you need a repair and up to 25% off repairs. Ask us whether it fits your boiler.

Repair or Replace Your Boiler?

Repair usually makes sense when a single part has failed. If faults keep returning or the problem is serious, it is worth looking at a new boiler, and our boiler replacement and installation page explains your options and the free in-home consultation. If replacing turns out to be the better route, you can apply for financing.

Why Homeowners Call AVS for Boiler Repair

Homes and businesses We repair residential and commercial boilers from all major brands, so one team can look after both your house and a commercial property.

Local and family owned Our offices in Fairfax and Bethesda have served Northern Virginia and Maryland since 1991.

Fully licensed Our license numbers are Virginia HVAC 2705039269A, Maryland HVAC 520714137895 and Maryland Home Improvement 4192876.

Rated 4.8 on Google AVS holds a 4.8-star average on Google across its customer reviews.

Book Boiler Repair or Maintenance

Whether your boiler has stopped heating or is due for its yearly service, call AVS to book a visit anywhere in Northern Virginia or Maryland. Tell us what the boiler is doing, and we will take it from there.

Virginia: 703-457-9028. Maryland: 301-686-7129.

Frequently Asked Questions About Boiler Repair & Maintenance

Who repairs boilers: a plumber or an HVAC company?

Both can. HVAC technicians routinely work on burners, controls, venting and safety devices, which are the parts that most often cause a boiler to fail, so boiler repair is well within what an HVAC company like AVS does every day.

Can I keep topping up my boiler’s pressure myself?

Repeated topping-up is not recommended. A boiler that keeps losing pressure is telling you something is wrong, and refilling it again and again only hides the problem. Have it inspected, and call us if the gauge keeps falling.

How much does a boiler service cost?

According to Bob Vila, an annual boiler inspection runs about $200 to $400 and routine maintenance about $150 to $400 across the United States. These are national figures, not AVS prices, so ask us for the price of your boiler service when you book.

What should my boiler’s pressure be?

According to InspectAPedia, a residential boiler typically reads about 12 psi when cold and around 20 psi when hot, and it can climb to just under 30 psi before the relief valve may open. A gauge that keeps falling, or sits well outside that pattern, is a reason to have the boiler inspected.

How long does a boiler last?

A well-maintained boiler lasts about 15 years, and repairs become more frequent after 15 to 20 years. If yours is in that range and keeps breaking down, compare the repair cost with a replacement before you pay for another fix.

How long does boiler replacement take?

Most boiler installations are completed within one to two days, depending on the system type and any piping or venting upgrades.

Boiler Work by Our Technicians

Photos from recent AVS boiler jobs.