AC Not Cooling
Running but blowing warm. Check the thermostat is on Cool and set below room temperature, and that the filter is not clogged. Still warm? Call.
Call 631-587-0085 →Cooling
24/7 Emergency AC Repair On Long Island
Central air quit in a July heat wave. Water dripping from the air handler. A shop or office getting hotter by the hour. Call NJM and a licensed Long Island team answers, day or night.
NO COOLINGCENTRAL AIRDUCTLESSCOMMERCIAL
Licensed & Insured
Master Plumber
TASK 86/87 Certified
Navien NSS Certified
22+ YEARS ON LONG ISLANDGet Your Free Estimate
LICENSED & INSURED · NASSAU & SUFFOLK
PLUMBING · HEATING · COOLING · CONTRACTING
Have An Emergency? We’re Available 24/7.
631-587-0085WE ANSWER EVERY CALL24/7 Emergency Cooling
AC Down In A Heat Wave? Call Now.
Central air always picks the hottest week of July to quit. NJM’s line is answered 24 hours a day, 7 days a week, every day of the year, for homes and businesses across Nassau and Suffolk County. Central air, ductless mini-splits, heat pumps and rooftop units, all major brands.
Call 631-587-0085 as soon as it stops. While you are on the phone, the checks below rule out the simple causes and stop a small fault turning into a dead compressor.
24/7Emergency AC Calls
24/7 Emergency ServiceLicensed & Insured
Master PlumberLicensed to pull permits
TASK 86/87Certified for gas work
Navien NSSFactory-trained on tankless
22+ years on Long Island · Plumbing, heating, cooling, gas and contracting under one roof
Call Now
Cooling Emergencies We Answer Day Or Night
What it looks like, and what to check before you call.
Outdoor Unit Silent
Indoor fan on, outside unit not running. Check the breaker and the outdoor disconnect. Do not keep resetting a breaker that trips again. Call.
Call 631-587-0085 →Water Leaking Indoors
Water dripping from the air handler or a ceiling below it: usually a blocked condensate drain or a failed pump. Turn the system off and call before the ceiling stains.
Call 631-587-0085 →Ice On The Lines Or Coil
Frozen copper lines or coil. Turn cooling off and run the fan only to thaw it. Running it frozen can damage the compressor. Then call.
Call 631-587-0085 →Burning Smell Or Buzzing
Shut it off at the thermostat and the breaker, and call. Electrical faults are not a wait-and-see.
Call 631-587-0085 →Ductless Unit Stopped
Blinking lights or no cooling from a wall unit. Note the light pattern, because it tells us a lot, and call.
Call 631-587-0085 →Someone Vulnerable In The Heat
An elderly relative, a new baby or anyone unwell in a house with no cooling. Get them somewhere cool first, then call.
Call 631-587-0085 →Business Losing Cooling
Office, shop or restaurant getting hot during opening hours. Rooftop units and commercial systems, answered around the clock.
Call 631-587-0085 →What We Fix
Emergency AC Repair
Central Air Repair
Split systems that stopped cooling, traced to what actually failed.
Cooling — before you call
Two kinds of visit. You’ll know which before we come.
We don’t charge to quote a job. We do charge to find a problem nobody has identified yet. Which one you need — and what it costs — gets agreed on the phone, so nothing about the cost is a surprise on the doorstep.
The rate you are told is the rate
You get the number on the phone, before anyone is dispatched, and it is what you are charged when the technician arrives. One rate across all four trades — plumbing, heating, cooling and gas.
What it pays for
A licensed, insured technician carrying the certifications the work needs, and the time to find what has actually failed — not a quick look and a guess.
Watch for the bait and switch
A call-out advertised at almost nothing gets recovered once someone is standing in your basement. Get the number before anyone travels — from us, or from anyone else you call — and hold them to it when they arrive.
Financing on larger jobs
A boiler that fails in January is not a purchase anyone planned. Financing is available on the big-ticket work, so a system replacement does not have to come out of savings in one go.
What it is normally used for
Boiler, furnace and water heater replacement, a full air conditioning system, a whole-house repipe, sewer and water main work, and larger contracting jobs — kitchens, bathrooms, dormers and extensions.
When to bring it up
At the estimate, before anything is scheduled. It is worth asking even if you think you will not need it, because knowing it is there changes what you are willing to consider fixing properly.
What it does not change
The price of the job. The quote is the quote whether you finance it or not — and on a straightforward repair it is usually not worth the paperwork. We will tell you which one you are looking at.
Financing provided throughSynchronyCredit is extended by Synchrony. Subject to credit approval.
Call 631-587-0085Not sure which one you need? Call and describe it — we will tell you before we book anything.
Straight answers, no upsellStraight Answer
Fix It, Or Finally Replace It?
Most no-cooling calls are a repair: a capacitor, a contactor, a blocked drain or a fan motor. If that is all it is, that is what we fix, even in the middle of a heat wave when a new system would be an easy sell.
If the system is old, leaking refrigerant year after year, or the compressor has failed, replacement starts to make more sense. And do not just buy a bigger unit because the old one struggled. An oversized system cools fast, shuts off before it pulls the humidity out, and leaves the house cold and clammy. We size the new one with a load calculation for the house.
- One failed part on a sound system: repair it
- Failed compressor or repeat refrigerant leaks: price a replacement
- Bigger is not better: we size it with a load calculation
- Not sure? Call 631-587-0085 and ask
Fall Specials
Money Off, Plainly Stated
What it says on the coupon is what comes off the bill. Mention it when you call.
$50 Off
A/C System Repair
Fifty dollars off the repair. We find what failed rather than topping it up and leaving.
Code NJM-ACREP50Fall Special · valid through November 30, 2026See the details →$50 OffYour First Service Call
New to NJM? Fifty dollars off the first time we come out — one licensed team for plumbing, heating, cooling and gas.
Code NJM-FIRST50Fall Special · valid through November 30, 2026See the details →Common Questions
Straight Answers
Still not sure what you are dealing with? Call and talk to our cooling team, 24 hours a day.
631-587-0085Free Estimate →Do you answer AC calls at night?
Yes. The line is answered 24 hours a day, every day of the year, including nights, weekends and holidays. Call 631-587-0085.
How fast can you get here?
That depends on the day, the heat and where you are, and in a heat wave everyone calls at once. We would rather not promise a time we might not keep. Call and we will tell you honestly.
Is there an extra charge for nights or weekends?
You get the figure on the phone before anyone is dispatched, including for nights, weekends and holidays.
My lines are covered in ice. Should I keep it running?
No. Turn cooling off and run the fan only so it thaws. Running a frozen system can damage the compressor, which is the most expensive part of it.
Should I just get a bigger air conditioner?
Almost never. An oversized unit short-cycles and leaves the house cold and damp. The fix is usually the right size, the ductwork or the airflow, and we size replacements with a load calculation.
Do you fix ductless mini-splits?
Yes. Ductless and multi-zone systems, all major brands, alongside central air and heat pumps.
Do you handle commercial cooling?
Yes. Rooftop units and commercial systems for offices, shops and restaurants across Nassau and Suffolk County.
More Cooling Services
Everything We Handle In Cooling
One licensed team, one number to call, across Nassau and Suffolk County.
Service Area
Proudly Serving Long Island and Surrounding Areas.
Based in North Babylon, working across both counties — close enough to get there fast, local enough to know the housing stock and the permit offices.
Find Cooling Services Near You!
- Long Island
- Nassau County
- Suffolk County
Towns We Serve
- North Babylon
- Babylon
- West Babylon
- Deer Park
- Lindenhurst
- Farmingdale
- Massapequa
- Hicksville
- Dix Hills
- Commack
- Islip
- Hempstead
- North Hempstead
- Rockville Centre
Proudly serving all of Nassau and Suffolk County, with deep local roots near our North Babylon home base.
Get A Free EstimateWhat Long Island Says
Reviews From Homes & Businesses We've Served
5 out of 5 stars
NJM Mechanical Inc are awesome!!!!! Just Had a maintenance call / yearly service. Always professional prompt service. I had Neil as my service tech - great job.
Dan O.July 2026
5 out of 5 stars
Neil has handled all my A/C needs over the years. He's very communicative and open about service charges. He never steers you wrong
Jim JacksonMay 2026
5 out of 5 stars
Neil Mazzella was able to add me to his emergency call list, same day service. Temps reached 100! Efficient, fixed the unit within a hour!
Donna RinaldiJuly 2025
AC Down? Call 631-587-0085 Now.
Central air, ductless, heat pumps and rooftop units, answered 24 hours a day across Nassau and Suffolk County.