AC Maintenance Services for Businesses and Homes
Stay ahead of costly breakdowns with professional HVAC maintenance. We provide scheduled tune-ups and custom AC service plans for commercial and residential systems.




AC Maintenance Services
Preventive Maintenance That Keeps You Cool and Operational
Routine AC maintenance is the key to avoiding breakdowns, reducing energy bills, and extending the life of your system. At Temperature Control Systems, we offer full-service AC maintenance for commercial properties and residential homes across Suffolk County.
Whether you manage a restaurant in Ronkonkoma or want to prep your central air for summer in East Islip, our technicians deliver expert inspections, cleanings, and performance checks to keep your system running at its best, before problems start.
Maintenance for All Types of AC Systems
Our team is trained to maintain a wide variety of air conditioning systems, including commercial and high-efficiency residential units. We follow manufacturer guidelines and provide thorough reports after every visit.
Rooftop AC Units
Split & Packaged Systems
Ductless Mini Splits
Central Air Systems
Energy-Efficient Cooling Units
Server Room/IT Cooling Systems

Our Services
Commercial Refrigeration
Keep your walk-ins, reach-ins, and display cases running 24/7. We service restaurants, delis, and grocery stores across Suffolk County with emergency repairs and preventative maintenance to protect your inventory.
Air Conditioning Installation
New construction or replacing that 20-year-old unit that’s barely keeping up? We size systems properly (most companies don’t), handle all permits, and get your AC running right the first time.
Furnace Installation
Installing new furnaces across Suffolk County for over 25 years. Gas, oil, or electric – we measure your house properly, size the system right, and complete most installs in 6-8 hours with minimal disruption.
Heat Pump Installation
Heat pumps are getting crazy popular because one unit does heating AND cooling. Way more efficient than old oil furnaces, and your electric bills drop like crazy. We install them right so they work in our Long Island winters.
Air Conditioning Repair
Your AC died in the middle of July? We get it – happens to everyone. Our trucks are stocked with parts for most major brands, so we usually fix it on the first visit without the “I’ll have to order that” runaround.
Emergency Heating
Heat died at 2AM when its 15 degrees outside? We answer our phones 24/7 and keep emergency trucks ready because heating problems don’t wait for business hours. Usually there within 90 minutes.
Boiler Installation
Radiant heat is incredible when it works right. We install high-efficiency boilers for homes and commercial buildings, handle all the zone controls, and make sure every room gets the heat it needs.
Commercial HVAC Installation
King Kullen, medical buildings, warehouses – we handle commercial installs that need permits, crane rentals, and weekend work so we don’t disrupt your business. Rooftop units, split systems, whatever you need.
Air Conditioning Maintenance
A $129 spring tune-up prevents a $4,000 emergency replacement in August. We clean coils, check refrigerant levels, test electrical connections, and catch small problems before they become expensive ones.
Furnace Repair
Weird noises coming from the basement? Heating bills climbing for no reason? We diagnose and fix gas, oil, and electric furnaces fast. Most repairs done same-day with our fully-stocked service trucks.
Boiler Repair
Leaking boiler? No heat in half the house? Pressure issues? We work on all boiler types and actually understand hydronic systems. Most techs don’t – we’ve been doing this since 1999.
Commercial Heating
Retail stores, restaurants, office buildings – when your commercial heat goes down, you lose money fast. We service and install commercial heating systems throughout Suffolk County with minimal downtime and proper maintenance scheduling.

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
Trusted by Suffolk County for Preventive HVAC Care
Our Service Areas
We’ve been servicing HVAC systems across Suffolk County for over 25 years. Our trucks are on the road every day from Huntington to Montauk, and we know Long Island homes inside and out. If you’re in Suffolk County, we’re already in your neighborhood.
Ronkonkoma
Our home base since 1999 – we’re your neighbors servicing furnaces, AC units, and commercial HVAC throughout the community.
Islip
Complete heating and cooling services for Islip, East Islip, and Central Islip homes and commercial properties.
Huntington
Fast response times for heating and cooling emergencies across Huntington, Huntington Station, and surrounding areas.
Babylon
Serving Babylon, West Babylon, and North Babylon with reliable furnace installation, AC repair, and emergency HVAC services.
Patchogue
From emergency furnace repairs to new AC installations, we service homes and businesses throughout the greater Patchogue area.
Brookhaven
Full-service HVAC coverage for Brookhaven Town – from residential furnace repairs to commercial heating installations.
Smithtown
Trusted HVAC contractor for Smithtown families and businesses – same-day service available for heating and cooling emergencies.
Frequently Asked Questions About AC Maintenance
Want to know how often to schedule service or what’s included in a tune-up? Here are common questions from Suffolk County businesses and homeowners.
We recommend scheduling AC maintenance twice a year, once in spring before the cooling season and once in fall. Commercial systems with heavier use, like restaurants or server rooms, may need quarterly visits. Regular service keeps your system running efficiently and catches problems before they turn into expensive repairs.
A standard visit includes checking and cleaning condenser and evaporator coils, testing refrigerant levels, inspecting electrical connections and capacitors, replacing or cleaning filters, calibrating the thermostat, and running a full system performance test. You get a written report after every visit.
Yes. We offer annual service contracts for commercial properties that include scheduled visits, priority scheduling during peak season, and discounted rates on any repairs found during inspections. Most of our restaurant and retail clients are on contracts because one skipped visit in June can mean a breakdown in July.
Yes. Most AC breakdowns we see could have been caught with a routine inspection. Worn capacitors, low refrigerant, dirty coils, and loose electrical connections are all things we find and fix during maintenance visits before they cause a system failure on the hottest day of summer.
Yes. We maintain all major commercial and residential AC brands including Carrier, Trane, Lennox, Mitsubishi, Daikin, Goodman, York, and Rheem. We also service older and legacy systems that other companies won’t touch.