Ronkonkoma's Trusted HVAC Contractor for 25+ Years
When your heating, cooling, or refrigeration system fails, you need an HVAC contractor Ronkonkoma businesses trust. Temperature Control Systems delivers 24/7 emergency service, expert installations, and reliable maintenance throughout Suffolk County. Since 1999, we’ve completed over 6,000 projects for commercial and residential customers across Long Island.
24 Hour HVAC Service
Last month, a medical office in Central Islip called us at 11 PM on a Sunday. Their climate control system crashed and they had temperature-sensitive medications that would be ruined by morning. The office manager was near tears because two other companies told her they couldn’t come until Tuesday.
Our guy was there by 12:30 AM. Had them running again by 3 AM.
That’s what 24 hour HVAC service actually means. Not “we’ll get there eventually.” Not “call back during business hours.” We mean someone answers the phone at 3 in the morning, and a certified technician is rolling out to your location while you’re still on the call.
Our emergency response covers the whole Suffolk County area. Ronkonkoma, Islip, Babylon, Huntington, Patchogue, Smithtown – if your heating or cooling system picks the worst possible time to quit (which is always), we’re already on our way.
We keep fully stocked trucks on the road because most emergency calls get fixed the same visit. No “we gotta order parts” excuses. No coming back three days later. Most times, we diagnose the problem, fix it, and you’re back to normal before the sun comes up.
Boiler Supplier
Commercial boilers don’t mess around. When they fail in a Long Island winter, people notice real fast. We’ve installed and serviced boilers for warehouses, apartment buildings, office complexes, and industrial facilities all across Suffolk County.
Temperature Control Systems works with all the major boiler manufacturers – Weil-McLain, Burnham, Peerless, Crown. We source the right equipment for your specific application, not whatever we got the best deal on last week. Big difference there.
Lot of guys will try selling you an oversized boiler because it’s “better to have too much than too little.” That’s garbage advice that costs you thousands in wasted fuel. We do actual heat load calculations, factor in your building envelope, and size your boiler correctly.
Our boiler services cover installation, repair, maintenance, and emergency breakdowns. We handle the permits, coordinate inspections, and make sure everything meets Suffolk County building codes. You don’t gotta worry about any of that.
Our HVAC Services
HVAC Contractor
Being an HVAC contractor in Ronkonkoma means understanding Long Island weather. The humid summers that make air conditioners work overtime. The nor’easters that test heating systems. The shoulder seasons where you need both heating and cooling in the same week.
We design commercial HVAC systems for:
Restaurants and bars that need constant temperature control for food safety Retail stores where comfort affects how long customers stay Medical offices with strict air quality requirements
Warehouses and distribution centers Office buildings with multiple zones Hotels and hospitality businesses
Our HVAC installations include complete design, permitting, equipment sourcing, crane scheduling for rooftop units, ductwork, electrical connections, startup, and testing. We coordinate everything so you’re not dealing with six different contractors.
Most commercial HVAC work needs to happen after hours so you don’t lose business. We do that. Our crews will come in at midnight on a Saturday, swap out a rooftop unit, and have you operational before you open Monday morning.
Heating Contractor
Long Island winters aren’t as brutal as upstate, but when your heating system fails in January, it feels plenty brutal. We’ve been the heating contractor that Suffolk County businesses call when comfort and safety are on the line.
Commercial heating is different than residential. You got larger spaces, higher ceilings, specific temperature requirements, occupancy schedules, and equipment that runs harder. A restaurant kitchen needs different heating than a doctors office. Warehouse heating is nothing like retail store heating.
Temperature Control Systems installs and services:
Gas furnaces and forced air systems
Oil-fired heating equipment Electric heating systems Radiant heating Heat pumps for combined heating and cooling Boiler systems for hydronic heat
We handle everything from small office buildouts to major warehouse heating installations. Our technicians stay current on all manufacturer certifications and Suffolk County code requirements.
Preventive maintenance matters even more with commercial heating. One breakdown during business hours costs you way more than an annual service contract. We’ll put you on a maintenance schedule that catches problems before they become emergencies.
Air Filters
Evaporator and Condenser Coils
Fan Blades and Motors
Condensate Drain Lines
Ductwork
Grilles and Registers
Refrigerant Lines
Outdoor & Indoor Units
Thermostat
Refrigerant Leaks
Compressor Issues
Fan Motor Problems
Thermostat Malfunctions
Blower Motor Issues
Capacitor Failures
Electrical Problems
Condenser Coil Problems
Evaporator Coil Issues
Expansion Valve Problems
Ductwork Issues
Heat Exchanger Problems
Water Leaks
Control Board Issues
Airflow Problems
Furnace Repair Service
Furnace making weird noises? Pilot light keeps going out? Blowing cold air when it should be heating? Not turning on at all? We’ve seen it thousands of times.
Most furnace problems show warning signs weeks before they actually fail. Strange smells, uneven heating, higher fuel bills, the system cycling on and off too much. If you catch stuff early, repairs are usually simple and cheap. Wait until it completely dies, and you might be looking at replacement.
Our furnace repair service covers all fuel types and all major brands. Carrier, Trane, Lennox, Goodman, Rheem, Bryant, Amana – doesn’t matter. Our techs work on everything.
Common furnace repairs we do:
Ignition system failures Thermostat problems Blower motor replacement Heat exchanger cracks (big safety issue) Gas valve issues Limit switch failures Flame sensor cleaning Draft inducer problems
We always give you options. Sometimes a repair makes sense. Sometimes the furnace is old enough that replacement is smarter financially. We’ll explain both scenarios with actual numbers so you can make an informed decision.
Heating Equipment Supplier
When you need new heating equipment, you want someone who knows what they’re doing. Not a salesman trying to hit quota. We supply and install commercial and residential heating equipment throughout Suffolk County.
We’re authorized dealers for major manufacturers, which means better pricing, faster warranty service, and access to technical support when needed. Our relationships with suppliers also mean we can get equipment faster when you need emergency replacement.
Choosing the right heating equipment depends on:
Building size and layout Insulation and building envelope quality
Fuel availability and costs Local code requirements Budget considerations Future expansion plans
We don’t push one brand over another. We recommend what actually makes sense for your situation. Sometimes that’s a high-efficiency condensing furnace. Sometimes it’s a basic model that’s easier to maintain. Depends on your building and budget.
What our clients are saying
Refrigerator Repair Service
Commercial refrigeration keeps Long Island restaurants, delis, supermarkets, and food businesses running. When refrigeration fails, you got hours before you’re throwing away thousands of dollars in inventory.
Temperature Control Systems does refrigerator repair service for:
Walk-in coolers and freezers Reach-in refrigerators
Display cases and merchandisers Ice machines Prep tables and under-counter units Refrigerated prep stations
We service all major commercial refrigeration brands – True, Turbo Air, Beverage Air, Hoshizaki, Delfield, Traulsen. Our trucks carry common parts because nobody can afford to wait three days for a compressor.
Common refrigeration problems:
Not cooling properly (most common call we get) Ice buildup Compressor failures Refrigerant leaks Door seal problems Thermostat failures Fan motor issues Evaporator problems
We’re available 24/7 for refrigeration emergencies because we know what it costs when your cooler goes down on a Friday night during dinner rush. Our typical response time is under 90 minutes anywhere in Suffolk County.
Commercial Refrigerator Supplier
Installing commercial refrigeration requires expertise. The equipment is expensive, the installation is complicated, and mistakes cost you big money in wasted energy and failed equipment.
Temperature Control Systems supplies and installs commercial refrigeration systems for new restaurants, renovations, and equipment upgrades. We handle everything:
Equipment selection and sizing Electrical requirements and upgrades Refrigerant line installation
Condensing unit placement Proper ventilation Code compliance Startup and testing
We work with restaurant owners, architects, and general contractors to make sure refrigeration systems integrate properly with kitchen layouts. Our experience means we catch problems in the design phase before they become expensive fixes during installation.
Whether you’re opening a new deli in Patchogue or upgrading your Huntington restaurant’s walk-in, we’ll design a refrigeration system that keeps your food safe and your energy bills reasonable.
HVAC System Replacement
Most commercial HVAC systems last 15 to 20 years with proper maintenance. After that, you’re spending more on repairs than the equipment is worth, efficiency drops, and breakdown risk increases.
We handle complete HVAC system replacement for commercial and residential properties across Suffolk County. Our process includes:
Site assessment and load calculations Equipment recommendations based on your needs
Removal and disposal of old equipment New equipment installation Ductwork modifications if needed Updated controls and thermostats Final testing and commissioning Permit coordination
Replacing commercial rooftop units requires crane scheduling and careful planning. We coordinate everything so the work happens during your slowest hours with minimal business disruption.
Many Suffolk County businesses qualify for PSEG Long Island rebates on high-efficiency equipment. We’ll help you navigate those programs and maximize your rebates.
Ductless Mini Split Installation
Ductless mini split systems work great for:
Older buildings where adding ductwork isn’t practical Room additions and renovations
Spaces with specific temperature requirements Improving comfort in problem areas Supplemental heating and cooling
Mini splits are more efficient than window units and give you better temperature control. Each indoor unit operates independently, so different rooms can have different temperatures.
Temperature Control Systems installs Mitsubishi, Daikin, Fujitsu, and LG ductless systems. Installation typically takes one day for single-zone systems. Multi-zone systems take longer depending on how many indoor units you need.
We handle all the technical details – proper refrigerant line installation, electrical connections, condensate drainage, and mounting. Our installs are clean, professional, and include warranty registration.
Commercial HVAC Maintenance
Preventive maintenance is the smartest money you’ll spend on HVAC equipment. Regular service extends equipment life, prevents expensive breakdowns, improves efficiency, and keeps you compliant with commercial building codes.
Our commercial HVAC maintenance programs include:
Scheduled inspections and tune-ups Filter changes Refrigerant level checks Electrical connection testing Blower motor maintenance
Thermostat calibration Complete system testing Priority emergency service
We customize maintenance schedules based on your equipment and usage. A restaurant running HVAC 16 hours a day needs more frequent service than an office building. We’ll recommend what actually makes sense.
Maintenance contracts also mean you get priority scheduling when you do need repairs. When half of Suffolk County is calling because their AC quit during a heatwave, our maintenance customers get served first.
Rooftop HVAC Installation
Most commercial buildings use rooftop HVAC units because they save indoor space and are easier to maintain. Installing rooftop units requires specialized equipment and coordination.
Our rooftop HVAC installation service includes:
Crane scheduling and coordination Curb adapter installation Rigging and equipment placement
Gas and electrical connections Ductwork integration Control system setup Testing and startup
We work with building owners and managers to schedule installations during low-occupancy periods. Most rooftop replacements happen overnight or on weekends to avoid disrupting business operations.
Safety is critical with rooftop work. Our crews are trained and equipped for working at heights, and we coordinate with building management on access and safety protocols.
PTAC Installation
PTAC units (packaged terminal air conditioners) are common in hotels, apartments, senior living facilities, and some commercial applications. They’re the through-wall units you see in hotel rooms.
Temperature Control Systems installs and services PTAC units throughout Suffolk County. We work with:
Hotels and motels
Apartment buildings Senior housing facilities Assisted living centers Dormitories
PTAC installation requires proper wall sleeves, weatherproofing, electrical connections, and correct unit sizing. Poor installation leads to air leaks, water intrusion, and comfort problems.
We install all major PTAC brands and can source units that match your existing equipment. When you’re replacing units in an occupied hotel or apartment building, matching existing configurations makes the job cleaner and faster.
Why Suffolk County Businesses Choose Temperature Control Systems
We’ve been the HVAC contractor Ronkonkoma businesses trust since 1999. Over 6,000 completed projects. Thousands of satisfied customers who call us first when they need heating, cooling, or refrigeration work.
What makes us different:
We actually answer the phone – Try calling other HVAC companies at 10 PM on Saturday. You’ll get voicemail. Call us, you get a person who can dispatch a technician immediately.
Fast response times – We average 90 minutes for emergency calls anywhere in Suffolk County. Our trucks are stocked and ready to roll.
Transparent pricing – We give you real numbers upfront. No “we gotta see it first” games. No surprise charges after the work is done.
Licensed and insured – Fully certified technicians, proper insurance coverage, permits pulled when required. We do things right.
Local expertise – We know Suffolk County buildings, weather patterns, and common HVAC problems specific to Long Island. That experience matters.
Our service area covers Ronkonkoma, Islip, Central Islip, Huntington, Babylon, West Babylon, Patchogue, Brookhaven, Smithtown, and throughout Suffolk County. If you’re in Nassau County, we cover that too.
Get Help From Your Local HVAC Contractor in Ronkonkoma
Your heating, cooling, or refrigeration system doesn’t care about your schedule. Problems happen at the worst possible times. That’s why Temperature Control Systems stays available 24/7 for emergencies.
For routine service, installations, or maintenance programs, call us during business hours. We’ll schedule a time that works for you and send experienced technicians who show up when promised.
Been putting off that weird noise your HVAC system makes? Worried about your aging equipment? Want to set up preventive maintenance before problems start? Let’s talk about it.
Temperature Control Systems – keeping Long Island comfortable since 1999.
Service Area: Ronkonkoma, Islip, Central Islip, Huntington, Babylon, West Babylon, Patchogue, Brookhaven, Smithtown, Suffolk County, Nassau County
Services: 24 Hour HVAC Service, HVAC System Replacement, Ductless Mini Split Installation, Commercial HVAC Maintenance, Rooftop HVAC Installation, PTAC Installation, Boiler Supplier, Heating Contractor, Furnace Repair Service, Heating Equipment Supplier, Refrigerator Repair Service, Commercial Refrigerator Supplier
License & Insurance: Fully licensed and insured HVAC contractor serving commercial and residential customers throughout Long Island