Mount Vernon · Westchester County · Since 1969
Westchester’s heating & cooling experts since 1969
Boilers, furnaces, heat pumps, central air and ductless systems: repaired right, maintained on schedule and installed to last. Factory-trained technicians, customers who’ve stayed with us for decades, and a real person on the phone 24/7.
- 24/7 emergency service
- Homes & businesses
- Financing available
What we do
Heating, cooling & refrigeration, all under one roof
From the steam and hot-water boilers in Westchester’s older homes to the refrigeration that keeps local businesses running, our technicians know how to fix just about any problem.
Heating & Boilers
Steam and hot-water boilers, 90%+ condensing boilers, furnaces, heat pumps and water heaters, repaired and replaced right.
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Air Conditioning
Central air that won't turn on, blows warm or freezes up, fixed, plus high-efficiency replacements when it's time.
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Ductless Mini-Splits
Quiet, efficient comfort for homes with radiators and no ductwork, plus blower wheel cleanings that clear the buildup behind musty smells.
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Maintenance & Repair
Maintenance agreements we schedule and bill for you, so your equipment lasts longer and costs less to run.
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24/7 Emergency Service
No heat on a January night or no cooling in a heat wave? We answer around the clock and dispatch a trained technician.
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Commercial & Refrigeration
HVAC, commercial refrigeration and ice machines for businesses, churches and property managers, with planned maintenance.
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Why Westchester calls All State
An attitude of service. It’s in our DNA.
All State Air Control has been keeping Westchester homes and businesses comfortable since 1969. We’ve stayed in business the old-fashioned way: word-of-mouth referrals from satisfied customers, many of whom have trusted us for decades.
Our owners, Russ and Frank, have run the business for more than 40 years. They lead a team of experienced technicians who know how to fix just about any problem, and who get sent to manufacturers’ factories around the country to keep up with the latest equipment.
Factory-trained techs
Ongoing factory training, seminars and in-house training. Authorized by many of the major manufacturers.
Equipment history log
We track every unit’s age, parts and service history, so the next visit starts with the facts.
Maintenance on autopilot
Sign up for a maintenance agreement and we schedule and bill the visits for you.
Honest recommendations
If a repair beats a replacement, we’ll say so. We’d rather save you money than sell you a system.
One call for the whole house
Every system that keeps your home comfortable
Tap a number to see how we help. Westchester homes often mix old and new: a steam boiler in the basement, an AC system in the attic, a ductless system in the addition. We work on all of it.
- 1Boiler or furnaceSteam, hot-water & 90%+ condensing boilers
- 2Water heaterRepair and replacement
- 3Radiators & baseboardBleeding, balancing, repairs
- 4App-controlled and remote monitoring thermostatAdjust and check your system from your phone
- 5Ductless mini-splitRoom-by-room cooling and heat
- 6Central air conditioningOlder R-22 & R-410A to new R-454B & R-32
Reviews
Customers ask for our technicians by name
Google rating · read our reviews
(opens in a new tab)Russ and the guys replaced both of my (very old) systems on the hottest days of the year. They worked from sun up to sundown that day — without complaint and minimal breaks. The new systems are so good we’re running them about half as much as the old but the house is colder than it’s ever been.
Wil P.Google review · Aug 2025 Google Frank and his team are the best of the best. Professional, competent, and easy to be around! They make you feel as if you are their only client. Don’t hesitate to give them a call. You won’t regret it!
Barbara D.Google review · Jul 2025 Google Service tech Winston was awesome, answered all my questions and explained everything perfectly. He even showed me how to clean the waste pump!
Eric U.Google review · Jul 2025 Google
Maintenance agreements
Fewer breakdowns, lower bills
Regular maintenance is the best way to prevent problems, like changing the oil in your car. Sign up once and we automatically schedule and bill your heating and cooling tune-ups.
See what’s includedFinancing
A new system, on a monthly budget
We’re an approved contractor with the National Energy Improvement Fund. Pre-screen online and know your options before your project starts.
Explore financingService area
Minutes from southern Westchester and the North Bronx
Our shop is on South Columbus Avenue in Mount Vernon. We serve homes and businesses throughout Westchester County and the North Bronx, and our 24/7 emergency service covers all of it.
- Mount Vernon
- Pelham
- New Rochelle
- Bronxville
- Tuckahoe
- Eastchester
- Yonkers
- Scarsdale
- Larchmont
- Mamaroneck
- White Plains
- Hartsdale
- Ardsley
- Dobbs Ferry
- Hastings-on-Hudson
- Harrison
- Rye
- Port Chester
- Elmsford
- Tarrytown
- North Bronx
Questions
Good to know
Still deciding? These are the questions we hear most. Anything else, just call. You’ll get a straight answer.
Do you offer 24/7 emergency heating and air conditioning service?
Yes. Call (914) 668-8211 any time, day or night, and we'll dispatch a factory-trained technician. Our office is open Monday to Friday, 8 a.m. to 5 p.m. for scheduling and questions.
What areas do you serve?
We're based at 222 S Columbus Ave in Mount Vernon and serve homes and businesses throughout Westchester County and the North Bronx. See our service area for the towns we visit most.
Do you work on both homes and businesses?
Yes. We serve residential and commercial customers, from a single boiler to a building's HVAC, commercial refrigeration and ice machines.
Can I finance a new heating or cooling system?
Yes. We're an approved contractor with the National Energy Improvement Fund (NEIF). You can pre-screen online to see your options before the project starts.
Need heat, cooling or a second opinion?
Talk to a real person at All State: day, night or weekend.