Looking for boiler repair or installation in Northern Virginia? Leonard Splaine services and replaces gas, oil, hot-water, and steam boilers, from no-heat calls to full replacements, and keeps radiator and baseboard systems running.
Why us?
Serving Northern Virginia
Hot-water and steam boilers still heat plenty of older Northern Virginia homes, and we're one of the last companies in the region that services gas and oil boilers alike. We fix no-heat calls, leaking valves and tanks, bad circulator pumps, low pressure, air-locked radiators, banging and whistling noises, and pilot and ignition faults. Warning signs like rising energy bills, visible corrosion, or strange sounds usually mean a boiler needs attention, and safety comes first with any gas system. When a boiler is past saving we install a new high-efficiency system that keeps your radiators and baseboard running and lowers your heating bills.
Find a company that still knows steam heat and cast iron, and hold onto it. Most contractors stopped training on boilers decades ago; we never did, because we've been repairing them since 1956 and the third generation of our family learned radiators from the two before it. That kind of continuity can't be bought or faked.
A cold radiator gets sorted with a single call: our phone is staffed live no matter the hour, and boiler visits typically go out the same day, whether it's a pressure drop or a full no-heat.
Our Services
Repair, replacement, and the parts that keep a hot-water or steam boiler heating your home.
No heat, strange noises, or a boiler that keeps shutting down, we fix it. Our techs repair gas and oil boilers of every kind: pilot and ignition faults, bad aquastats and controls, stuck valves, low water, and short-cycling, so your hot-water or steam heat comes back the same visit whenever possible.
When a boiler is past saving, we install a new high-efficiency gas or oil boiler and tie it cleanly into your existing radiators or baseboard. You get a system sized to the home, an upfront itemized quote, free estimates, and financing options, without ripping out the heat distribution you already have.
If one part of the house is cold while the rest is warm, it's usually a circulator pump or a zone valve. We replace failed pumps, repair sticking zone valves, and get every zone circulating hot water evenly again.
A boiler that keeps losing pressure, dripping, or tripping the relief valve usually has a leak, a waterlogged expansion tank, or a bad fill valve. We find the source, replace the expansion tank or relief valve, and get the system holding steady pressure again.
Cold or noisy radiators and baseboard usually mean trapped air, a stuck vent, or a flow problem, not a dead boiler. We bleed and balance radiators, replace bad vents and valves, and get quiet, even heat back into every room.
A yearly boiler tune-up keeps combustion clean, catches leaks and worn parts early, and keeps the system efficient. Our maintenance plan covers scheduled service, priority scheduling, waived diagnostics, and repair discounts, and keeps your warranty valid. Ask us for the current details.
The difference
Already know what you need?
Reviews
Real reviews from real Leonard Splaine boiler repair & installation jobs across Northern Virginia. We've earned our 4.9-star average the slow way: answering the phone, showing up on time, and doing right by every home.
Lynn Gilbertson Google review Kyle provided emergency holiday weekend service when our a/c was completely out with 104F "feels like" temperatures. He quickly diagnosed and fixed our system, with solutions for avoiding similar problems in the future. We are grateful to Kyle and Leonard Splaine!
Katie Kada Facebook recommendation Couldn't have asked for better service! Leonard Splaine was timely, honest and did a wonderful job replacing our very outdated AC unit. We plan to use them again for any service or replacement in the future and we'll recommend them to our friends and family.
I will definitely use this company again! Our AC went out on one of the hottest days of the year. They answered and came to the rescue! Family owned and very kind. Technician was knowledgeable and quick.
Ankur Mundra Facebook recommendation I've used Leonard Splaine the last 5 years. They are professional, provide quality service, and answer my questions and concerns. Michael Ford came out this year to do my spring maintenance as well as eztrap installation and condenser coil cleaning. He did an excellent job.
Candace Bond Google review They were such gentlemen and seemed to be very knowledgeable and honest. They were also very patient and took the time to answer all of our questions. I would highly recommend these guys.
A/C stopped working on the hottest day of the year, so far. They came over the same day and had it up and running in no time. The price was reasonable and the tech was great.
Our Team
Every boiler repair & installation visit is handled by real, named people who treat your home like their own. We're family-owned, 70 years in, and three generations of the same family crew. When you call Leonard Splaine, you reach these folks. Learn more about us.
Ted Leonard 3rd-Generation Owner 
Gary Leonard 2nd-Generation Owner 
Johnny Baker General Manager 
Erin Simmons Office Manager 
Brian Boyce Service Manager 
Brad Hoskins Field Supervisor 
Ira Sacknowitz Install Manager 
Ricky Seminario Comfort Advisor Where we work
Headquartered on Occoquan Road in Woodbridge, we bring boiler repair & installation to Prince William, Fairfax, Arlington, Alexandria, Stafford, and the towns in between every day.
Don't see your town? If you're in Northern Virginia, call us. Odds are we've got a truck nearby.
Good questions
The questions Northern Virginia homeowners ask us most about boiler repair & installation. Anything else, the phone's faster than the internet.
Yes. We are one of the last companies in Northern Virginia that still services and replaces oil-fired boilers and furnaces, and we deliver home heating oil too. If you heat with oil, you only need one phone number.
Usually a leak somewhere in the loop, a waterlogged expansion tank, or a failing fill valve or relief valve. We find the source and fix it, instead of just topping off the pressure and waiting for it to drop again.
If the boiler is under 15 years old and the fix is minor, repair it. If it's older, badly corroded, or facing a major part, a new high-efficiency boiler often pays for itself in fuel savings. We give you the honest numbers and a free estimate.
Usually, yes, and it often is not the boiler itself. Cold radiators are commonly trapped air, a stuck vent, a bad zone valve, or a circulator pump. We bleed and balance the system and replace what is failing so every room heats evenly.
A well-maintained boiler often lasts 15 to 25 years, longer than most forced-air furnaces. Annual maintenance and catching leaks early are what get you to the top of that range.
Same-day service across Northern Virginia. Talk to a real person, day or night.
