Licensed & Insured · Free Estimates

Heating Repair &
Installation
Long Island

Furnaces, boilers, heat pumps, oil burners & radiant heat across Nassau & Suffolk County.

All brands serviced. Same-day repairs available. Free estimates on new heating systems.

All Heating BrandsSame-Day ServiceFree Estimates24/7 EmergencyLicensed & Insured

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Quick Answer

How much does heating repair cost on Long Island?

Heating repair in Nassau and Suffolk County costs $150–$600 for most common issues. Emergency service calls and diagnostics run $89–$150. New furnace installation starts at $3,500–$8,000 installed. New boiler installation ranges $4,000–$12,000 depending on system type and home size.

Complete Heating Services for Long Island

LI Heating & Cooling provides full-service heating repair, installation, and maintenance across Nassau and Suffolk County. Whether you need a fast same-day furnace repair, a new boiler installed, or annual heating maintenance, our licensed technicians handle all makes and models.

Long Island's cold winters put heavy demands on heating equipment. Older oil burners and gas furnaces tend to fail on the coldest nights of the year. Our technicians understand local heating systems — from the aging steam boilers in older North Shore homes to the high-efficiency gas furnaces in newer South Shore developments.

From Carrier and Lennox to Weil-McLain and Burnham, we service all major heating brands. Our trucks carry common parts — igniters, flame sensors, motors, belts, aquastats — to maximize same-day fix rates and get your home warm again as fast as possible.

Our Heating Services

Expert heating service across all system types and brands

Emergency Furnace Repair

24/7 emergency furnace repair throughout Long Island. No heat? We respond within the hour to diagnose and repair all furnace brands and models.

Same-day response, any hourCall Now →

Boiler Repair & Service

Expert oil and gas boiler repair, maintenance, and installation for Long Island homes. We service hot water and steam boilers of all brands.

Oil & gas, all brandsCall Now →

Heat Pump Repair

Heat pump repair, installation, and maintenance for Suffolk and Nassau County homes. Mini-splits, central systems, and more.

Repair & installationCall Now →

Oil Burner Repair & Service

Expert oil burner repair, annual service, and oil heating system maintenance across Nassau and Suffolk County. All brands. Emergency service available.

Oil burner & heating oil systemsCall Now →

Water Heater Repair & Replacement

Water heater repair and replacement for tank, tankless, and heat pump water heaters across Nassau and Suffolk County. 24/7 emergency service.

Tank, tankless & heat pumpCall Now →

Furnace Installation

Full furnace replacement and installation service. We help you choose the right system for your home and install it to manufacturer specs.

Replace & new installsCall Now →

Boiler Installation

Complete boiler replacement and new installation for Long Island homes. Oil-to-gas conversions, high-efficiency upgrades, and system right-sizing.

Oil, gas & high-efficiencyCall Now →

HVAC Maintenance

Annual heating system tune-ups to maximize efficiency, extend equipment life, and prevent emergency breakdowns during Long Island winters.

Annual tune-ups & checksCall Now →

Radiant Heat Repair

Radiant floor heating and baseboard heat repair throughout Long Island. We diagnose and fix circulation, zone valve, and boiler issues.

Floor & baseboard heatCall Now →

Heating Oil Delivery & Tank Service

Heating oil delivery, tank inspections, and oil tank installation or replacement for Long Island homes. Emergency delivery available. Above-ground and underground tank service.

Delivery, tank inspection & replacementCall Now →

Gas Line Installation & Repair

Gas line installation, repair, leak detection, and appliance hookups across Nassau and Suffolk County. All gas work is permitted and inspected. Emergency response for gas leaks.

Installation, repair & appliance hookupsCall Now →

Ductwork Repair & Replacement

Duct inspection, sealing, repair, and replacement for Long Island homes. Improve airflow, reduce energy waste, and eliminate hot and cold spots.

Duct sealing, repair & installCall Now →

Thermostat Repair & Installation

Thermostat repair and smart thermostat installation across Long Island. Programmable, WiFi-enabled, and smart home compatible systems.

Smart & programmable thermostatsCall Now →

Heating Repair FAQs

How much does furnace repair cost on Long Island?

Furnace repair in Nassau and Suffolk County typically costs $150–$600. Diagnostic service calls run $89–$150 (applied toward repair costs). Common repairs like igniter replacement, flame sensor cleaning, and blower motor service range $150–$450. Major component failures (heat exchangers, control boards) can run $500–$1,200+. We provide upfront pricing before any work begins.

How long does heating repair take?

Most heating repairs are completed in 1–3 hours. We stock common furnace and boiler parts on every truck — igniters, sensors, motors, belts — to maximize same-day fix rates. Emergency calls are prioritized for rapid response across Long Island.

What heating brands do you service?

We service all major heating brands: Carrier, Lennox, Trane, York, Goodman, Rheem, Bryant, Weil-McLain, Burnham, Peerless, and more. Both gas and oil systems, forced hot air and hot water heat.

Do you repair both furnaces and boilers?

Yes. We service all heating system types including gas and oil furnaces, hot water boilers, steam boilers, heat pumps, radiant floor heating, baseboard heat, and oil burners. All brands and system sizes across Nassau and Suffolk County.

How do I know if I need heating repair or replacement?

Repair if your system is under 15 years old and the repair cost is under 50% of replacement cost. Replace if it's over 20 years old, needs frequent repairs, or runs very inefficiently. We give honest assessments — no pressure to replace unnecessarily.

Is 24/7 emergency heating service available on Long Island?

Yes. We offer same-day and after-hours emergency heating repair across Long Island for no-heat situations. When your furnace or boiler goes down on a freezing Long Island night, call us — we prioritize emergency calls for rapid response.

We Also Handle Cooling & AC

From central air installation to emergency AC repair — licensed technicians across Nassau & Suffolk County.

View Cooling Services →

No Heat on a Cold Long Island Night?

Same-day heating repair available across Long Island. Free estimates on new furnace and boiler installations.

📞 Call (631) 612-6928

Schedule Your Heating Service

Or call us directly: (631) 612-6928

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