Affordable Heating and Cooling Maintenance Services for Year-Round Comfort

Regular HVAC maintenance is necessary when your comfort depends on your heating and cooling systems. At Citywide Heating & Cooling, we assist small businesses and homeowners in St. Louis, MO, in extending the lifespan of their heating and cooling systems, lowering energy expenses, and preventing costly malfunctions. We are here to keep your systems operating at optimal efficiency, whether you are managing a small office or a busy home.

Local, Certified, and Customer-Focused

At Citywide Heating & Cooling, we’re not just another contractor; we’re your neighbors. Our team is EPA Type I and II certified, experienced with heating and cooling technologies, and trained to deliver professional results with a friendly touch. Since March 1, 2023, we’ve helped hundreds of St. Louis and surrounding area residents stay comfortable

Among Others, We Service:

A person cleaning a white air conditioning unit with a spray nozzle, creating steam.

Man in gray shirt inspecting a boiler, likely for repair. He is looking closely at the internal components in a bright room.

A technician in a safety vest and cap adjusts controls on a machine. They hold a tablet in the other hand.

Person in a yellow hard hat inspecting an air conditioning unit mounted on a brick wall.

A technician wearing a cap and gloves services a wall-mounted air conditioner unit in a room with a white wall.

A worker in a safety vest examines pipes in an industrial setting. He wears a cap and gloves while holding a clipboard.

Person adjusts a smart thermostat on a tablet near a radiator. He wears work clothes, including a tool belt and gloves, in a home setting.

Man installing or adjusting a ventilation vent on a metal duct. An air conditioner is mounted on the wall.

Why Routine Maintenance Matters for Your Heating and Cooling Systems

It’s easy to forget about your heating and cooling system—until something breaks. But did you know most HVAC failures can be prevented with routine care? Regular maintenance can improve energy efficiency by up to 15%. That’s money back in your pocket and fewer cold nights or sweltering afternoons without relief. Join our Maintenance program and enjoy VIP benefits.

A neglected system can:

Consume more energy.
Wear out faster.
Produce poor indoor air quality.
Fail unexpectedly during extreme weather.

A smiling technician in a hard hat works on an air conditioning unit mounted on an outdoor wall.

A person in work clothes is servicing a white air conditioning unit on a wall indoors.

Join Our Membership Program

Coming Soon!

Most air temperature system malfunctions can be avoided. Our maintenance program extends the life of your unit and helps you identify minor problems before they become major expenses through routine inspections and tune-ups.

Members get priority scheduling and peace of mind. Everything is taken care of by our qualified staff, including thermostat checks, coil cleaning, refrigerant levels, and air filters. Join our maintenance membership today and avoid surprise repairs tomorrow.

Signs Your Hvac System Needs Maintenance

Wondering if your system is overdue for a checkup? Here are some common red flags:

Rooms feel unevenly heated or cooled.
Energy bills are climbing without reason.
Your furnace or AC is cycling too frequently.
There’s a musty or burning smell from vents.
Thermostat settings don’t match the room temperature.
Your system makes banging, grinding, or rattling noises.
You haven’t serviced your system in over a year.

HVAC technician in a hard hat and safety vest inspecting an air conditioning unit near a brick building.

Our certified technicians catch small problems before they become expensive repairs. With EPA-certified care and flexible service hours, we’re the go-to maintenance team for St. Louis City, County, St. Charles, and nearby Illinois communities.