Heating Services
Furnace Repair
Long Island.
Gas and oil furnace repair throughout Suffolk and Nassau County. Same-day and 24/7 emergency service — we'll get your heat back on fast.
What we repair
Gas & Oil Furnace Repair
All Brands.
A1's licensed technicians repair all makes and models of gas and oil furnaces throughout Long Island. We carry common parts on our trucks for fast, same-day repairs, and we provide upfront pricing before any work begins.
Brands we service
We repair and service furnaces from all major manufacturers including:
24/7 emergency service
Furnace not working?
Call A1 now — 24/7 emergency furnace repair across Long Island.
Call 631-331-2102Common questions
Furnace Repair FAQs
Why won't my furnace start?
The most common causes are a faulty igniter or flame sensor, a tripped safety switch, a dirty air filter restricting airflow, a malfunctioning thermostat, or a gas supply issue. Call A1 at 631-331-2102 and we'll diagnose it fast.
How long does a furnace last on Long Island?
Most gas furnaces last 15–20 years with proper maintenance. Oil furnaces can last 20–25 years. If your furnace is approaching the end of its lifespan and requiring frequent repairs, replacement is often the more cost-effective choice.
Is it safe to run a furnace with a cracked heat exchanger?
No. A cracked heat exchanger can allow carbon monoxide to leak into your home, which is a serious safety hazard. If we find a cracked heat exchanger during inspection, we'll recommend immediate repair or replacement.
How much does furnace repair cost on Long Island?
Furnace repair costs vary widely. Minor repairs like an igniter replacement are relatively inexpensive. Major repairs like a heat exchanger or control board can cost significantly more. We provide upfront pricing after diagnosis — no surprises.
Do you offer emergency furnace repair on Long Island?
Yes. A1 offers 24/7 emergency furnace repair throughout Long Island. A furnace failure in winter is never something you should wait on — call 631-331-2102 any time.
Why is my furnace blowing cold air?
A furnace blowing cold air is often caused by an overheating system that has tripped a safety limit switch, a faulty pilot light or igniter, a dirty flame sensor, or a problem with the gas valve. A1 can diagnose the issue and restore heat quickly.
How often should I have my furnace serviced?
We recommend an annual furnace tune-up every fall before heating season. Regular maintenance keeps your furnace running safely and efficiently, extends its lifespan, and helps catch issues like cracked heat exchangers or failing igniters before they leave you without heat.
Do you repair oil furnaces on Long Island?
Yes. A1 repairs and replaces both gas and oil furnaces throughout Long Island. We service all major brands including Lennox, Carrier, Trane, Rheem, and more, and we carry common parts on our trucks to minimize downtime.
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Same-day & emergency service
Furnace Repair on Long Island
Licensed, insured, and trusted by Long Island homeowners since 2019. Call now or request service online.