
Boiler Repair
Boiler Repair on Long Island
Same-day boiler repair for Suffolk County homes. Oil and gas boilers, all major brands, transparent flat-rate pricing with a $129 service-call fee credited toward the repair. Not sure what's wrong? Try our HVAC troubleshooter first.
Last updated: April 2026
What We Fix
Common Boiler Problems We Repair
These are the boiler issues our technicians see most often across Suffolk County: oil-fired, gas, and combi systems.
Loss of Pressure
Falling pressure usually means a leak, a waterlogged expansion tank, or a failed auto-fill valve. We trace the cause and fix the underlying problem, not just top off the water.
No Heat / No Hot Water
Could be the circulator pump, the aquastat, the gas valve, or the oil burner depending on your system. We diagnose the full control sequence so the repair actually solves it.
Strange Noises
Kettling, banging, and gurgling usually mean scale buildup in the heat exchanger or trapped air in the piping. Both are fixable and extend the boiler's life.
Leaking Water
Any visible water around the boiler is a problem. Most boiler leaks come from the pressure relief valve, a failed pump seal, a corroded fitting, or a cracked heat exchanger. The fix ranges from cheap to total replacement, and we'll tell you honestly which it is.
Short Cycling
The boiler fires on and off rapidly without delivering real heat. Often an oversized boiler, a dirty or miscalibrated aquastat, or a thermostat issue. We diagnose the control layer before throwing parts at it.
Pilot / Ignition Problems
Gas boilers with repeated ignition failures usually need a flame sensor cleaning or a hot surface igniter replacement. Oil boilers with starting issues usually need a nozzle, transformer, or cad cell replacement.
Long Island Boilers
Boiler Repair on Long Island, NY
Long Island has one of the highest concentrations of oil-fired boilers in the country. A lot of the houses built in the 1950s through the 1980s still have their original boiler or a like-for-like replacement from the 90s. Those systems work, but they're aging out, and salt air in the southern coastal communities accelerates corrosion on copper piping and cast iron housings.
When we come out for a boiler repair, we look at the whole system, not just the failing part. If the boiler is over 15 years old and you're facing a repair that costs more than 40% of a replacement, we'll give you the replacement math too, including whether an oil-to-heat-pump conversion with the PSEG Long Island heat pump rebate ($4,000 to $7,500 by income tier) gets you a lower all-in cost.
We service oil boilers, gas boilers, combi boilers, and hot water tanks. Brands we see most often on Long Island: Weil-McLain, Burnham, Buderus, Lochinvar, Navien, Peerless, and Utica. Common parts ride on the truck so most repairs finish in one visit.

Transparent Pricing
Boiler Repair Cost Ranges
Most boiler repairs cost between $200 and $900. We'll always give you an exact written quote before any work begins.
| Repair Type | Typical Cost | Time |
|---|---|---|
| Circulator pump replacement | $400 - $700 | 1 - 2 hrs |
| Aquastat replacement | $200 - $400 | 1 hr |
| Expansion tank replacement | $250 - $500 | 1 hr |
| Pressure relief valve | $150 - $350 | 45 min |
| Oil burner nozzle / cad cell | $200 - $450 | 1 hr |
| Gas valve replacement | $300 - $600 | 1 - 2 hrs |
Maintenance plan members save 10%, 15%, or 20% on repair labor depending on the plan.
Preventive Service
Annual Boiler Service Keeps the Repair Call From Happening
Most boiler breakdowns we see could have been caught at the annual service. Our maintenance plans start at $19/month and include a full tune-up, priority scheduling, and discounted repairs if something does come up.
See Maintenance PlansBoiler Repair Across Suffolk County
Patchogue · Medford · East Patchogue · Bellport · North Bellport · Gordon Heights · Sayville · Blue Point · Holbrook · North Patchogue · Ronkonkoma · Bohemia · Bayport
All boiler brands. Oil, gas, and combi systems. Written quotes before any work begins.
Boiler Not Working?
Text Us and We'll Get a Tech to You.
Reach us at (631) 209-7090 by text or call. We'll ask a few questions about what your boiler is doing and schedule you the same day or next morning.
Text (631) 209-7090Text preferred • All boiler brands serviced
Common Questions
Boiler Repair FAQs
Most boiler repairs on Long Island cost between $200 and $900 depending on the issue. Common fixes like a circulator pump replacement run $400-$700. Ignition, aquastat, or thermocouple replacements are usually $200-$450. A full boiler replacement is a separate conversation, and we'll give you a written repair quote before any work begins. If replacement makes more sense, we'll lay out that option with rebate pricing too.
As a general rule, if your boiler is over 15 years old and the repair costs more than 40% of a replacement, replacement is the smarter move. Older oil boilers in particular lose efficiency every year, and an oil-to-heat-pump conversion is usually the strongest replacement path on Long Island once the PSEG rebate is factored in. We do not do oil-to-gas conversions. We always price both the repair and the conversion so you can decide with the full picture.
Yes. Long Island has thousands of legacy oil-fired boilers, and we service them regularly. Common oil boiler repairs include nozzle replacements, oil burner cleanings, flame retention head adjustments, and aquastat replacements. If your oil boiler is near end-of-life, we can also walk you through whether a PSEG-rebated oil-to-heat-pump conversion makes more sense than another repair.
Yes. We service gas-fired boilers from most major brands including Weil-McLain, Burnham, Buderus, Lochinvar, Navien, and Peerless. Common gas boiler repairs include gas valve replacements, pressure switch issues, ignition failures, and flame sensor cleanings. We carry common parts on the truck so most repairs finish in one visit.
A well-maintained boiler on Long Island typically lasts 15-25 years. Oil boilers tend to fall on the lower end of that range because oil combustion is harder on the equipment. Salt air in the southern coastal communities can also shorten the lifespan of copper and cast iron components. Annual service makes a meaningful difference, and we offer maintenance plans that include a full boiler tune-up.
The most common causes of a boiler losing pressure are a leak in the system (baseboards, pipe fittings, a failed pressure relief valve), a waterlogged expansion tank, or a failing auto-fill valve. Repeatedly adding water to keep pressure up is a sign something is leaking, and running a low-pressure boiler can damage the heat exchanger. Call us sooner rather than later.
For a lot of Long Island homeowners, yes. The PSEG Long Island heat pump rebate for oil-to-heat-pump conversions knocks a meaningful chunk off the install, which brings the out-of-pocket cost closer to a like-for-like boiler replacement. Our documented jobs show heating costs dropping roughly 34 percent. If you want central cooling too, that comes from a ducted or ductless air-to-air system, not from an air-to-water heat pump feeding your existing baseboards, so we price cooling as its own line. Rebate amounts and savings are estimates, they depend on eligibility, they can change, and we confirm the final numbers in writing before you sign anything. We explain the full math on our oil-to-electric page.
Related Guides
Helpful Reading
Buying Guide
Can a Heat Pump Work With My Radiators?
Most heat pumps can't drive Long Island radiators. One new system can. Here's how heat pumps work with existing radiators and what's actually changed in 2026.
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Heat Pump vs Oil Furnace on Long Island
Heat pump vs oil furnace for Long Island homes. Real fuel costs, efficiency data, and the rebates that help Suffolk County homeowners decide which to install.
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Is an Oil-to-Heat-Pump Conversion Worth It?
Thinking about an oil to heat pump conversion on Long Island? We compare real costs, savings, rebates, and payback periods so you can decide if it makes sense.
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More Ways We Can Help
Furnace & Heating Repair
Oil, gas, electric, and heat pump heating systems serviced.
Heating Tune-Up
$149 flat. Furnace, boiler, heat pump. Combustion safety check included.
Oil-to-Electric Conversion
Full oil-to-heat-pump conversions with rebate handling.
Maintenance Plans
Tune-ups, waived service fees, and repair discounts starting at $19/month.