HVAC Repair
in Long Island, NY
HVAC Repair in Long Island. Same-day HVAC repair and troubleshooting on every system for restaurants, retail & offices. Licensed & insured — call ART HVAC.
24/7 Emergency Service
Con Edison Rebates
5.0 Google & Yelp
Up to 12-Year Warranty
Long Island HVAC Repair Problems That Cost More the Longer They Wait more than you think
Larger Long Island homes mean bigger systems, more ductwork, and when something breaks — a refrigerant leak, a humming condenser, blowing warm air in July — the impact is felt in every room.
Warm air all July
Your AC runs all day but upstairs still bakes; warm air through good ducts usually means low refrigerant or a dying compressor.
Humming, buzzing outdoor unit
A condenser that hums or buzzes on startup often points to a failing capacitor or contactor that will quit on you soon.
Maybe a refrigerant leak
A faint chemical smell, ice on the line, and weak cooling point to a leak that can burn out the compressor if ignored.
One more summer, fingers crossed
Your 15-plus-year-old system still runs but you dread July, and nobody gives you a straight answer on how much is left.
OUR SERVICES
Long Island HVAC Fixed Right
Nassau and Suffolk homeowners get same-day HVAC repair from a crew that knows Long Island's suburban central-air systems inside and out.
Emergency HVAC Repair
Same-Day & After-Hours Response
Long Island Nassau and Suffolk homeowners run large central systems through extreme seasons. We dispatch same-day, carry the most common repair parts, and price everything upfront before work starts.
Diagnostics & Troubleshooting
Pinpoint the Real Problem
Long Island homes often have older ductwork and mixed-brand equipment that hides refrigerant faults. We test every component and give you a plain-language written report before recommending any fix.
Repair vs. Replacement Advice
When a Fix Isn't Worth It
On Long Island, replacing a full central-air system is a major project. We give you an itemized repair-vs-replace cost breakdown, explain rebate options, and back every repair with a written warranty.
TRUSTED PARTNERS
Brands We Work With
We install and service equipment from the world's leading HVAC and refrigeration manufacturers.
Daikin VRV multi-zone systems, FIT line ductless heat pumps, and Atmosphera air handlers — installed and serviced by Art HVAC's experienced Daikin installers. Installed and serviced across Nassau and Suffolk County homes and businesses. 
Fujitsu Halcyon ductless mini-splits, Airstage VRF, and Cold Climate H-series heat pumps — installed and serviced by Art HVAC's experienced Fujitsu technicians. Installed and serviced across Nassau and Suffolk County homes and businesses. 
Mitsubishi Electric M-Series and P-Series ductless mini-splits, Hyper-Heat (H2i) cold-climate heat pumps, and City Multi VRF — installed and serviced by Art HVAC's experienced technicians. Installed and serviced across Nassau and Suffolk County homes and businesses. 
LG Therma V air-to-water heat pumps, Multi V VRF, and Art Cool wall units — installed and serviced by Art HVAC. Installed and serviced across Nassau and Suffolk County homes and businesses. 
Carrier Infinity series gas furnaces, Greenspeed heat pumps, central AC, and commercial rooftop units — installed and serviced by Art HVAC's experienced Carrier installers. Installed and serviced across Nassau and Suffolk County homes and businesses. 
York YXV variable-capacity heat pumps, Affinity series, and Sunline commercial RTUs — installed and serviced by Art HVAC's experienced technicians. Installed and serviced across Nassau and Suffolk County homes and businesses. 
Heil Ion variable-speed gas furnaces, heat pumps, and central AC — Art HVAC delivers full design, install, and warranty service. Installed and serviced across Nassau and Suffolk County homes and businesses. 
Trane XV20i variable-speed heat pumps, gas furnaces, and Voyager commercial rooftop units — installed and serviced by Art HVAC's experienced technicians. Installed and serviced across Nassau and Suffolk County homes and businesses. 
Lennox Signature series heat pumps, SLP99V furnaces, and Solar-Ready inverter ACs — installed and serviced by Art HVAC's experienced Lennox installers. Installed and serviced across Nassau and Suffolk County homes and businesses. 
Samsung Wind-Free wall and ceiling cassettes, DVM S VRF, and EHS air-to-water heat pumps — Art HVAC installs Samsung HVAC across residential and commercial sites. Installed and serviced across Nassau and Suffolk County homes and businesses. 
Panasonic Aquarea air-to-water heat pumps, ETHEREA wall units, and Nanoe X air purification — Art HVAC handles Panasonic install, service, and warranty. Installed and serviced across Nassau and Suffolk County homes and businesses. 
Bosch IDS series inverter heat pumps, Greenstar gas boilers, and Climate 5000 ductless — installed and serviced by Art HVAC for residential and commercial projects. Installed and serviced across Nassau and Suffolk County homes and businesses. Long Island homes in Nassau and Suffolk run central systems, heat pumps, and ductless units. Our process works across all of them, consistently.
A Methodical Process for Lasting Results
No hassle, no surprises. We handle everything so you can sit back and enjoy a perfectly climate-controlled space.
Rapid Diagnosis
Long Island homes span Nassau and Suffolk, with equipment ranging from aging central systems to newer heat pumps. We diagnose the specific unit in front of us — no template assumptions.
Clear Quote & Approval
A written quote follows every diagnosis — itemized and fixed. Long Island homeowners are not surprised by add-ons at completion. The number you approve is the number on the invoice.
Precise Repair
We address the diagnosed fault with parts suited to your equipment's make and model. Across Long Island's range of home sizes, we work efficiently without cutting corners on the fix.
Test & Verify
Every repair ends with a system run. We measure airflow, temperatures, and electrical draw where relevant, confirming the problem is resolved and the unit is stable before we leave.
CLIENT TESTIMONIALS
Why Long Island Chooses ART HVAC
Real clients. Real jobs. Real results — not marketing copy.
Melisa C.
Aug 9
Emily G.
Aug 9
Grace B.
Feb 17
Sergey S
Jul 2025
Toni ..
4/19/2025
FAQ
Questions We Hear Every Day
Honest, engineer-level answers — no sales fluff.
Why is émy HVAC not blowing cold air? On Long Island the usual causes are low refrigerant, a frozen evaporator coil, a failing compressor, or a tripped breaker to the outdoor unit. Start with the filter — a clogged filter triggers more no-cooling calls than any refrigerant issue. If the filter is clean and the outdoor unit runs without cooling, refrigerant loss is likely. Refrigerant work on Long Island requires EPA-608 certified technicians; PSEG LI customers should also verify the outdoor disconnect hasn't tripped.
Why is émy HVAC blowing warm air while calling for cooling? The outdoor compressor usually isn't running even though the air handler fan is. Check the outdoor unit — if it's silent while the fan blows, suspect a bad capacitor, a tripped disconnect fuse, or a failed compressor contactor. Long Island homes with separate oil-heat and cooling systems should confirm which component is failing before authorizing HVAC repair. A capacitor replacement runs $120–$200; a contactor is $150–$250 — both straightforward fixes.
Why is émy HVAC humming? A loud hum from the outdoor unit with the compressor not starting points to a failed run capacitor — the motor is trying but can't turn over. A hum from the basement air handler is usually a relay or transformer. On Long Island's coastal communities, salt air accelerates corrosion on outdoor electrical components, making capacitor and contactor failures more frequent than inland. Addressing why your HVAC is humming early prevents compressor burnout, which costs ten times as much to fix.
Who can detect and fix HVAC leaks quickly on Long Island is any contractor holding EPA-608 certification, required by federal law to handle refrigerants. Leaks are found using electronic detectors or UV dye injection. Condensate leaks — water from a drain pan or clogged drain line — don't require special certification. Long Island homes are typically detached with basement air handlers, making access straightforward. Most refrigerant leak repairs involve brazing the leaking joint and recharging to manufacturer spec, completed in two to four hours.
What does HVAC refrigerant smell like? R-22 and R-410A have a faint sweet or ether-like odor at high concentrations, but at typical residential leak levels there's often no smell at all. A sweet chemical odor near your Long Island basement air handler warrants ventilating the space — refrigerant displaces oxygen in enclosed areas. Modern refrigerants are non-flammable at residential leak levels, but any suspected leak still requires leak detection and an EPA-608 certified repair before restarting the system.
Why is émy HVAC buzzing? A light buzz from the outdoor unit is often a loose panel or a vibrating refrigerant line touching the cabinet — simple to fix during a repair visit. A loud electrical buzz from the contactor or disconnect box can mean arcing contacts, which is a fire risk requiring prompt attention. In Long Island coastal towns, salt air corrodes electrical contacts faster than inland, making buzzing contactors a common HVAC repair. A contactor replacement runs $150–$250 and should not be deferred.
Still have questions? Contact us
Long Island Home Too Warm, Too Cold, or Too Loud?
Same-Day HVAC Help Is Available.
Call us and a licensed tech comes to your Long Island home — Nassau or Suffolk — diagnoses the issue, and gives you a clear price before any work begins.