About Temperature Control Systems, Trusted HVAC & Refrigeration Experts Since 1999
Serving Long Island’s commercial and residential HVAC needs with reliability, speed, and over 6,000 completed projects.
Long Island Commercial HVAC Experts
Over Two Decades of HVAC & Refrigeration Excellence in Suffolk County
Founded in 1999, Temperature Control Systems has grown from a two-man operation into one of Long Island’s most trusted commercial HVAC and refrigeration service providers. Based in Ronkonkoma and serving Suffolk County and Nassau County, we specialize in everything from emergency refrigeration repair to full commercial HVAC installs and maintenance programs.
What sets us apart is our hands-on approach, fast response times, and commitment to doing the job right the first time. Whether you run a restaurant, retail store, office building, or warehouse, we understand the urgency of your heating and cooling needs, and we show up ready to solve them.
Why Long Island Businesses Trust Us
At Temperature Control Systems, we believe that trust is earned through action. That’s why Long Island businesses rely on us for fast response times, honest service, and expert care. Whether it’s a last-minute refrigeration failure or scheduled HVAC maintenance, our team shows up on time, communicates clearly, and gets the job done right. With over 6,000 completed projects across Suffolk County and beyond, we’re proud to be known for reliability, professionalism, and the kind of customer service that keeps clients coming back.
- 24/7 Emergency Response
- 6,000+ Projects Completed
- Licensed & Insured
- Commercial Specialists
- Transparent Pricing
- Prompt Scheduling
Local Team. Industry Experts. Problem Solvers.
Our technicians are EPA-certified, factory-trained, and bring decades of combined experience to every job. We’ve worked with small businesses and major commercial facilities across Suffolk County, and we’re known for getting systems back online fast, especially when every minute counts.
Customers reviews
Documentation
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
Call Us Today
631-228-7667
Proudly Serving All of Suffolk County, NY
At Temperature Control Systems, we proudly serve every town and village across Suffolk County. Whether you’re located on the North Shore, South Shore, or anywhere in between, our technicians are ready to provide expert HVAC and refrigeration services. From busy commercial corridors in Ronkonkoma, Patchogue, and Smithtown to residential communities in Sayville, Selden, and East Islip, no job is too far or too small.
Frequently Asked Questions
Everything you need to know about our experience, service areas, and why Long Island businesses rely on us year-round.
We’ve been proudly serving Suffolk and Nassau County since 1999. With over 6,000 completed projects, we’re one of Long Island’s most experienced HVAC and refrigeration providers.
Yes. We specialize in commercial HVAC and refrigeration services, but we also offer residential heating and cooling solutions throughout Suffolk County.
We provide HVAC and refrigeration services across all of Suffolk County and parts of Nassau County, including Ronkonkoma, Patchogue, Medford, Smithtown, Sayville, and beyond.
Absolutely. All of our technicians are fully licensed, insured, and trained to work on a wide range of HVAC and refrigeration systems for both residential and commercial properties.
Yes. We offer 24/7 emergency service for critical HVAC and refrigeration issues, including weekends and holidays. Fast response is one of our top priorities.