24/7 EMERGENCY LINE: 631-591-2289 · Real Person, Any Time, Any Day

Emergency HVAC Repair Long Island NY

Heating broken? Cooling out? Not sure what's wrong? We're a generalist HVAC dispatch covering everything heating, ventilation, and air conditioning across Suffolk and Nassau, 24/7, with parts on the truck.

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Available 24/7/365: 631-591-2289

★★★★★ Family-owned in Wading River since 2004. Cross-trained on every system.

24/7 Emergency HVAC Repair Across Long Island

HVAC stands for heating, ventilation, and air conditioning, which means an HVAC emergency can hit any time of year and from any direction. The boiler quits in the middle of January. The central AC dies during the first 95-degree day in July. The heat pump throws a fault code and stops cooling. The thermostat goes blank. The air handler runs but produces neither warm nor cold air. Sometimes you know exactly what's wrong, and sometimes you have no idea, just an HVAC system that's not doing its job.

That's why All Island Comfort built our emergency HVAC repair service as a true generalist dispatch. Whether the problem is on the heating side or the cooling side, whether the equipment is gas, oil, electric, or refrigerant-based, our cross-trained technicians arrive ready to diagnose any HVAC system on the first visit. Family-owned in Wading River since 2004, covering all of Suffolk County and Nassau County, answering the phone 24 hours a day, every day.

If your home's HVAC system has failed and you need it back online tonight, call us and describe what you're seeing. We'll triage on the phone, dispatch the right tech with the right parts on the truck, and get it sorted.

Long Island emergency HVAC repair technicians ready to dispatch

HVAC Emergency Right Now? Call Us.

Skip the form. One number, real dispatcher, 24/7 across Suffolk and Nassau. We'll triage on the phone and roll a tech.

Call 631-591-2289

Every HVAC System We Repair on Emergency Calls

The "HVAC" umbrella covers a lot of equipment, and Long Island homes have all of it. We dispatch one tech who can diagnose any of it. No more "we don't work on that, you need someone else" runaround.

  • Gas furnaces: Forced-air natural gas furnaces. Pilot, hot-surface ignitor, gas valve, induced-draft motor, blower, limit switch, and pressure switch faults.
  • Oil furnaces: Oil-fired forced-air furnaces. Burner lockout, nozzle, electrode, oil pump, fuel filter, cad cell, primary control, and transformer faults.
  • Gas & oil boilers: Hot-water and steam boilers of every brand. Aquastat, low-water cutoff, pressuretrol, circulator pump, zone valve, expansion tank, and burner faults.
  • Central air conditioning: Split-system central AC of every age and brand. Capacitor, contactor, condenser fan motor, compressor, refrigerant charge, and TXV / metering-device faults.
  • Heat pumps: Air-source and ductless mini-split heat pumps in heating or cooling mode. Defrost cycle, reversing valve, refrigerant, compressor, and inverter faults.
  • Mini-split systems: Single-zone and multi-zone ductless systems (Mitsubishi, Daikin, Fujitsu, LG). Indoor head, line-set, condensate pump, and communication-fault diagnostics.
  • Packaged units & rooftop units: Self-contained gas-electric and heat-pump packaged units common on smaller buildings and additions.
  • Air handlers & furnace blowers: ECM and PSC blower motors, capacitors, run/start relays, blower wheels, and module replacement.
  • Ductwork & airflow: Disconnected supply or return runs, severely restricted filters, blocked registers, dampened zones stuck closed, and crushed flex duct.
  • Thermostats & controls: Programmable, smart (ecobee, Nest, Honeywell), and zoning-control panel faults. Wiring, low-voltage transformer, and communication issues.
  • Indirect water heaters & combination systems: Boiler-driven domestic hot water that fails along with the heating side.
  • Hydronic & radiant systems: Hot-water baseboards, panel radiators, and radiant floor coils tied to the same boiler that's failing.

Common HVAC Emergency Symptoms (Heating & Cooling)

Some symptoms are obviously heating-side or cooling-side. Others are ambiguous. Either way, this is the kind of HVAC dispatch that handles them. Here are the patterns we see most often.

System Won't Turn On at All

Thermostat displays nothing or shows "system off." Equipment is silent. Most common causes: tripped circuit breaker on the indoor or outdoor unit, dead thermostat batteries, blown low-voltage transformer at the air handler, control board failure, or for oil systems a primary-control lockout. Quick diagnosis with a multimeter usually finds the cause within 15 minutes on-site.

System Runs but Produces Neither Heat nor Cool

Air handler blower runs but the air coming out the registers is room-temperature. Heating side: gas valve failed, ignitor not firing, or oil burner not lighting. Cooling side: compressor is locked out (capacitor, contactor, or compressor itself), refrigerant is low or empty, or the metering device is failing. We can tell within minutes which side it's on.

Strange Noises (Banging, Rattling, Screeching)

Banging on heating start-up usually means delayed ignition (gas) or chamber expansion (oil). Loud rattling at the outdoor AC unit usually means a failing compressor or loose contactor. Screeching/squealing usually means a blower motor bearing or capacitor on its way out. Catching these early avoids bigger failures.

Burning Smell, Smoke, or Sparking

Burning electrical smell is always serious. Could be a blower motor failing, a wire shorting in the air handler, a contactor welded shut, or in worst case a transformer fire. Shut the system off at the breaker and call us. Don't keep running equipment that smells like burning insulation.

Water Leaking Around the Indoor Unit

Most common in summer when the central AC runs heavily. Causes: clogged condensate drain line, failed condensate pump, frozen evaporator coil that thawed and overflowed the pan, cracked drain pan, or restricted return airflow that froze the coil. Shut the system off, place towels under the leak, and call us. Continuing to run can cause ceiling damage on second-floor air handlers.

Frozen Evaporator Coil

Visible ice on the indoor coil or on the refrigerant line outside. Caused by low refrigerant (leak somewhere), restricted airflow (filter, blower issue, blocked returns), or a stuck TXV. Turn the system to "off" but keep the fan on "auto" to thaw the coil safely while we're on the way.

Tripping Breaker

HVAC tripping a breaker repeatedly is never normal. Causes include a shorted compressor, locked-rotor compressor that needs a hard-start kit, weak capacitor pulling extra amps on start, blower motor short, or in some cases a wiring problem inside the equipment. Do not keep resetting the breaker, the repeated current spikes can wreck the compressor entirely.

Thermostat Shows Error Code or Goes Blank

Smart thermostats (ecobee, Nest, Honeywell) display error codes when they detect HVAC problems they can't override. Blank thermostats usually mean dead batteries or a tripped float switch on the air handler that cut the 24-volt power. Easy diagnosis on visit one.

Don't Wait, the Damage Compounds

HVAC failures get worse fast. A frozen coil leads to compressor damage. A leaking line leads to ceiling damage. A locked-out boiler leads to frozen pipes. Call now.

Call 631-591-2289

Our 4-Step Rapid Response for HVAC Emergencies

  1. 1
    Triage on the call. A real Long Island dispatcher answers and walks through what you're seeing or hearing. We rule out anything you can fix in 60 seconds (thermostat batteries, tripped breaker, float switch reset), then dispatch immediately.
  2. 2
    Cross-trained tech to your door. Typical response is 1 to 3 hours across Suffolk and Nassau, faster for the North Shore corridor. Your tech can diagnose either heating or cooling on the same visit, no second appointment for "the other side."
  3. 3
    Diagnose and quote on-site. Flat diagnostic fee, written quote before any wrench moves, your written approval before any repair starts. Transparent pricing, no surprise charges.
  4. 4
    Restore the system tonight when possible. About 85% of our emergency HVAC calls finish on the first visit because the trucks carry parts for both heating and cooling. For uncommon parts we identify them on visit one and return next-day without a second diagnostic charge.

What to Do While You Wait for the Technician

  • If the AC is leaking water, shut the system off (not just thermostat — the breaker for the indoor unit), put towels under the leak, and bucket-catch any active drip. Don't run the AC again until we arrive.
  • If the heat is out and it's cold, close interior doors to trap warmth, open kitchen and bathroom cabinet doors so heat reaches pipes, and run cold water at a slow drip on faucets along exterior walls.
  • If you smell burning, shut the system off at the breaker. Don't try to "see if it goes away."
  • If you smell gas, leave the house and call 911 + National Grid (1-800-490-0045) before calling us.
  • If a CO alarm sounded, get fresh air immediately and call 911 if anyone has symptoms (headache, dizziness, nausea).
  • If the breaker keeps tripping, stop resetting it. Each reset risks more damage to the compressor or motor.
  • For a frozen coil, set the thermostat to "off" but the fan to "on" to thaw the coil safely with airflow.

Why Long Island Trusts Us With HVAC Emergencies

  • 22+ years on Long Island. Family-owned in Wading River since 2004. We know the housing stock and the equipment families.
  • True generalist dispatch. Heating side, cooling side, hybrid systems, packaged units, mini-splits. One company, one phone call, no handoffs.
  • A real person answers, day or night. 24/7/365 dispatch from a real local Long Island number.
  • Heavily stocked trucks for both sides. Igniters, gas valves, oil burner parts, capacitors, contactors, refrigerant, blower motors, control boards, thermostats. First-visit completion ~85%.
  • Licensed for everything we do. HVAC, plumbing, oil-burner, gas-fitting, EPA Section 608 refrigerant. Insurance certificates on request.
  • Flat, transparent pricing. Diagnostic fee disclosed on the phone. Repair quote in writing before work starts. After-hours premium disclosed up front.
  • Service plan members skip the line. Annual maintenance plan members get first dispatch priority and reduced after-hours rates.

Long Island Service Area for Emergency HVAC Repair

We dispatch to all of Suffolk and Nassau counties from our Wading River, NY base. Heating or cooling, day or night, anywhere on Long Island.

Suffolk County

  • Wading River
  • Riverhead
  • Mount Sinai
  • Rocky Point
  • Shoreham
  • Miller Place
  • Port Jefferson
  • Setauket
  • Stony Brook
  • Smithtown
  • Huntington
  • Northport
  • Centereach
  • Patchogue
  • Sayville
  • Manorville
  • Calverton
  • Mattituck
  • Cutchogue
  • Greenport
  • Westhampton
  • Hampton Bays
  • Southampton
  • East Hampton

Nassau County

  • Hempstead
  • Oyster Bay
  • Long Beach
  • Garden City
  • Hicksville
  • Levittown
  • Massapequa
  • Mineola
  • Freeport
  • Westbury
  • Plainview
  • Syosset
  • Bethpage
  • Farmingdale
  • Manhasset
  • Great Neck
  • Port Washington
  • Roslyn
  • Glen Cove
  • Rockville Centre
  • Valley Stream
  • Lynbrook
  • Wantagh
  • Bellmore

Related Emergency Services

If you already know which side of HVAC has failed, jump straight to the dedicated page for that system.

Related Standard Services

If it's not an after-hours emergency, our standard service pages cover routine repair, replacement, and tune-ups at non-emergency rates.

Return to all emergency services | Return to home

FAQs

Long Island Emergency HVAC Repair FAQs

What is considered an HVAC emergency on Long Island?

An HVAC emergency is any heating or cooling system failure that affects your safety or comfort and cannot wait for normal business hours. The most common Long Island HVAC emergencies are no heat in winter (under 40 degrees outside), no cooling during a heat advisory, suspected gas leak from a furnace or boiler, carbon monoxide alarm activation, water leaks around indoor HVAC equipment, frozen evaporator coils with active dripping, refrigerant leaks, electrical burning smell from any HVAC component, or any equipment lockout you cannot reset.

Is emergency HVAC repair the same as emergency heating and cooling repair?

Yes. HVAC stands for Heating, Ventilation, and Air Conditioning. The terms emergency HVAC repair and emergency heating and cooling repair are interchangeable. Both refer to 24/7 service for any heating or cooling system failure: gas or oil furnaces, boilers, central air conditioning, heat pumps, mini-splits, packaged units, air handlers, ductwork, and thermostats. We dispatch the same crew regardless of which term you used to find us.

I do not know if my heating or cooling is what is broken. Can you still help?

Absolutely. Generalist HVAC dispatch is exactly what this service is for. Many emergencies are unclear at the start: the system simply does not respond, the thermostat shows an error, the air handler runs but produces neither heat nor cool, water is dripping from somewhere near the unit, or a breaker keeps tripping. Tell the dispatcher what you observe and we will send a cross-trained tech who diagnoses both heating and cooling sides on the same visit.

How fast can you get to my Long Island home for an HVAC emergency?

Typical response time across Suffolk and Nassau counties is 1 to 3 hours from the call. We dispatch from Wading River with technicians staged across the North Shore and the East End. Existing customers and active service-plan members get first dispatch priority. Heat-wave summer days and deep-freeze winter days can extend response times slightly because of high call volume, but every emergency caller gets a confirmed ETA on the phone.

Do you carry parts for both heating and cooling repairs on the truck?

Yes. Our trucks are stocked for both sides: igniters, flame sensors, gas valves, oil burner nozzles and electrodes, blower motors, capacitors, contactors, common refrigerant types (R-410A, R-32, R-454B), TXV valves, control boards, circulator pumps, zone valves, thermostats, and air handler parts. About 85% of our emergency HVAC calls finish on the first visit.

What does emergency HVAC repair cost on Long Island?

The diagnostic fee is flat and disclosed on the phone before we dispatch. After-hours dispatch carries a service-call premium also disclosed up front. Common emergency repairs (igniter, flame sensor, capacitor, contactor, gas valve, blower motor, refrigerant top-up, oil burner nozzle and electrode) typically run $200 to $700 parts and labor. Major repairs (compressor, heat exchanger, control board, full air handler) run higher. We provide a written quote on-site before any work starts and never charge surprise add-ons.

What if my HVAC system cannot be repaired?

If the equipment is beyond economical repair, we can install a same-day or next-day replacement. We carry common gas and oil heating equipment in stock and can install central AC, heat pumps, and mini-splits within 24 to 48 hours of approval. Heat-pump replacement often qualifies for $2,000 to $10,000 in stacked NYS Clean Heat, federal, and manufacturer rebates if you're open to electrification.

Do you cover Nassau County for HVAC emergencies?

Yes. We cover all of Nassau County including Hempstead, Oyster Bay, Long Beach, Garden City, Hicksville, Levittown, Massapequa, Mineola, Freeport, Plainview, Syosset, Bethpage, Manhasset, Great Neck, Port Washington, Glen Cove, Rockville Centre, and surrounding areas. Response time to Nassau is typically slightly longer than Suffolk because of the distance from our Wading River dispatch base, but we still target same-day completion on every Nassau emergency call.

HVAC Down Right Now? Don't Wait.

Real local techs, 24/7 dispatch, parts on the truck for both heating and cooling. Family-owned in Wading River since 2004.

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