HVAC Services in Chesterfield, MO

Your air conditioner has been limping through summers, the repair bills keep climbing, and now you are weighing one more fix against a full replacement. Or maybe your furnace is the worry, or the air in the house just never feels right. 

Whether your home is in Green Trails, Kehrs Mill Estates, Conway Farms, Clarkson Woods, Baxter Pointe, or any of Chesterfield's other neighborhoods, Martin-Jetco Heating and Air Conditioning handles all of it, from a single repair to a complete system swap. Family-owned and operated since 1964, with more than 1,000 five-star Google reviews, we give you a straight answer on cost instead of a runaround.

We are a full-service company, which means one call covers your home year-round:

• Air Conditioning
• Heating
• Indoor Air Quality
• Commercial HVAC

Call (636) 205-1631 to schedule an in-home evaluation, or read on for honest cost estimates and how we work.

How Much Does It Cost to Replace an AC System in Chesterfield?

When repair no longer makes sense, most replacements fall into one of two ranges:

• Air Conditioner & Evaporator Coil Replacement: Approximately $5,500 to $9,200
• Complete HVAC System Replacement: Approximately $8,450 to $22,990+

Where your project lands depends on several factors:

• Home square footage
• System tonnage needed to cool your space
• SEER2 efficiency rating
• Single-stage versus variable-speed equipment
• Condition of your existing ductwork
• Whether a zoning system is involved
• Any electrical or code upgrades required
• Indoor air quality add-ons
• Accessibility of the installation area

The cost to replace an air conditioning system in Chesterfield typically ranges from approximately $5,500 to $9,200 for an air conditioner and evaporator coil replacement, while a complete HVAC system replacement generally ranges from approximately $8,450 to $22,990 or more. Larger Chesterfield homes, open floor plans, and homes with humidity-control challenges may call for more detailed load calculations and equipment recommendations.

The only way to get an accurate number is an in-home evaluation, where our NATE-certified technicians measure your space, size the system correctly, and lay out options that fit your home and budget. It also helps determine whether repair or replacement is the smarter long-term investment.

Ready to find out what your project will cost? Book an in-home evaluation online or call (636) 205-1631.

Rebates, Tax Credits, & Financing

A new system is a real investment, and there are usually ways to soften the cost. Martin-Jetco Heating and Air Conditioning helps you find and apply them:

• Financing spreads the cost into predictable monthly payments
• Utility rebates through Spire and other programs, which we help you process at the time of installation
• Federal energy-efficiency tax credits on qualifying high-efficiency equipment, where they apply
• Seasonal coupons and offers that can lower your total further

During your evaluation we can walk through equipment cost, monthly payment, and available savings side by side, so you see the full picture before you decide.

When Repair Makes Sense, & When Replacement Is the Smarter Move

A new system is not always the right call. Here is how we think it through with property owners:

• Age of the unit. Most central air conditioners and furnaces run well for 12 to 15 years. Past that point, repairs tend to stack up.
• Refrigerant type. Older systems running on R-22 are costly to service, since that refrigerant has been phased out of production.
• Repair cost versus replacement. When a single repair approaches a third of the cost of a new system, replacement usually saves money over the next few years.
• Comfort and energy use. Rising bills, uneven cooling, and a system that runs constantly often point to equipment that has outlived its efficiency.

We recommend repair when repair is the right answer, and replacement only when it genuinely serves you. Either way, our NATE-certified technicians walk you through the numbers before any work begins. Not sure which choice is better? Schedule a diagnostic visit online or call (636) 205-1631.

What Installation Day Involves

Once you approve the plan, a typical Chesterfield replacement follows this sequence:

1. We protect floors and walkways and remove the old equipment.
2. We set the new air conditioner, coil, and furnace as the project calls for.
3. We address any ductwork, electrical, or code items identified during your evaluation.
4. We charge the system, test airflow and temperature split, and walk you through thermostat and HVAC maintenance basics before we leave.

Most single-system installations are completed in a day.

How Quickly Can You Get HVAC Service?

When a system fails in the middle of summer or a hard winter freeze, response time becomes the whole ballgame. Martin-Jetco Heating and Air Conditioning offers same-day and emergency HVAC service. For many calls, we can have a technician on site within a few hours.

Here is what fast response typically looks like with Martin-Jetco Heating and Air Conditioning:

• Same-day visits are common. Customers who call in the morning often have a technician at the door by early afternoon, and in some cases within the hour.
• Early contact gets an early arrival. Reaching out first thing in the morning frequently means a technician is on site before mid-morning, diagnosis in hand.
• After-hours, weekend, and holiday availability. Furnaces and air conditioners do not pick convenient times to quit, so help is available on Sundays and outside normal business hours.
• Storm and extreme-weather response. When a furnace goes out during a snowstorm or an air conditioner fails on one of the hottest days of July, we work to get a technician out the same day, often when others are booked days out.
• Quotes without the wait. Repair quotes commonly arrive within hours of diagnosis, so you can make a decision and get the work scheduled fast.
• Most repairs resolved within 24 to 48 hours. From the first call to a working system, we do our best to quickly get your home comfortable again.

If your heating or cooling is down, call (636) 205-1631 for same-day and emergency HVAC service now.

Sizing a System for Local Homes & Humidity

Chesterfield's housing stock leans newer, with much of the city built out after its 1988 incorporation and a good number of larger estate homes across neighborhoods near Faust Park and the bluffs above the Valley. Bigger floor plans and open layouts need careful load calculations, not a guess based on the old unit's size. Summers here bring heavy humidity, so a properly matched system has to pull moisture out of the air, not just drop the temperature. An oversized unit short-cycles and leaves rooms clammy, while an undersized one runs nonstop. Martin-Jetco Heating and Air Conditioning sizes every replacement to the home in front of us so it cools evenly and dehumidifies the way it should.

Neighborhoods We Serve in Chesterfield

Martin-Jetco Heating and Air Conditioning serves homeowners throughout Chesterfield, including Wildhorse Village, Wildhorse Springs, Wildhorse Meadows, Green Trails, Green Trails Estates, Forest Hills, Nooning Tree, Four Seasons, Conway Farms, Conway Forest, Conway Meadows, Schoettler Valley, Baxter Lakes, Baxter Pointe, Clarkson Woods, River Bend Estates, Broadmoor, Kehrs Mill Estates, Highcroft Ridge, August Hill, Chesterfield Valley, and the surrounding West County communities.

Our crews work across the area every day, from the Chesterfield Commons and Boone's Crossing shopping districts to the Spirit of St. Louis Airport area and the Faust Park area, along with homes on the Baxter Road, Clarkson Road, Long Road, Olive Boulevard, Wild Horse Creek Road, and Chesterfield Parkway corridors.

The HVAC Brands We Install

A good recommendation starts with options, so Martin-Jetco Heating and Air Conditioning installs equipment from several of the industry's leading manufacturers across a range of efficiency levels and price points:

• York
• Goodman
• Daikin
• Carrier
• Trane

That range means your system is chosen around your home and budget rather than around a single product line, whether you need an AC installation, a furnace installation, or heat pump services.

Have an HVAC project coming up? Contact us online or call (636) 205-1631 to get started.

Six Decades of Service & Recognition You Can Verify

Martin-Jetco Heating and Air Conditioning has installed and serviced heating and cooling systems for St. Louis families since 1964. Every technician is licensed and NATE-certified, the leading independent certification in the trade. As a York Premier Dealer named York Dealer of the Year for many years running, with an A+ rating from the Better Business Bureau and six Angie's List Super Service Awards, the company has the credentials worth checking when you are choosing who to trust with a major home investment.

No Pressure, & Accountability When It Counts

When a technician from Martin-Jetco Heating and Air Conditioning sits down with you, the goal is a clear recommendation, not a hard sell. We explain your options, answer your questions, and leave the decision with you. That approach shows up in more than 1,000 five-star Google reviews. 

On the rare occasion a job needs a second look, the team comes back, takes responsibility, and makes it right, without you having to push for it. For a lot of homeowners, that follow-through is a major reason they call us back for the next project.

Year-Round Care with the Home Comfort Agreement

A new system performs best with regular care, and our Home Comfort Agreement makes that simple. The plan includes two HVAC maintenance visits a year:

• A spring visit to clean and check your cooling system before summer
• A fall visit to ready your heating system before winter
• Inspections that catch small issues before they become breakdowns

Most manufacturers also require documented maintenance to keep your warranty valid, so the plan protects both your comfort and your investment.

Frequently Asked Questions

What zip codes do you serve in Chesterfield? 

Martin-Jetco Heating and Air Conditioning serves all of Chesterfield, including the 63005 and 63017 zip codes, along with the surrounding West County communities.

How long does a new HVAC system last?

With regular maintenance, a quality HVAC system typically lasts 12 to 15 years, and some systems run longer when they are properly sized, installed, and serviced. Chesterfield's humid summers and seasonal temperature swings place steady demand on both air conditioners and furnaces, so routine maintenance carries real weight. Spring AC tune-ups, fall heating inspections, regular filter changes, clean coils, and prompt attention to small issues all help extend equipment life, improve efficiency, reduce breakdowns, and protect manufacturer warranty coverage.

How long does AC or HVAC installation take?

Most single-system replacements are finished in one day. Larger projects involving ductwork changes, zoning, or electrical upgrades may take longer, and we give you a clear timeline during your evaluation.

Should I repair or replace my air conditioner?

Repair usually makes sense for a newer air conditioner with an isolated issue, especially when the repair is inexpensive and the system has been reliable. Replacement becomes the smarter option when the unit is 12 to 15 years old, still uses R-22 refrigerant, needs frequent repairs, struggles to control humidity, drives up energy bills, or faces a repair that approaches a third of the cost of a new system. Martin-Jetco Heating and Air Conditioning evaluates the system and explains the repair cost, the replacement cost, comfort concerns, and long-term value, so you can make a confident decision without pressure. Call (636) 205-1631 today.

Are there rebates for high-efficiency HVAC systems in Missouri?

Often, yes. Utility rebates through Spire and federal energy-efficiency tax credits can apply to qualifying equipment. Our team helps you identify and process any that fit your installation. Learn more about financing and rebates.

What HVAC brands does Martin-Jetco Heating and Air Conditioning install?

We install York, Goodman, Daikin, Carrier, and Trane, which lets us match the equipment to your home and budget rather than to a single brand.

How much does AC repair cost in Chesterfield, MO?

AC repair costs in Chesterfield typically range from approximately $150 to $2,000 or more depending on the problem. Minor repairs such as capacitors ($150 to $450), contactors, thermostats ($100 to $600), or drain line issues usually fall on the lower end. More involved repairs, including refrigerant leaks, evaporator coil problems ($600 to $2,000), blower motor issues ($500 to $1,400+), or compressor-related failures, can cost significantly more. The age of the system, refrigerant type, parts availability, and overall condition of the equipment also affect the recommendation. Martin-Jetco Heating and Air Conditioning provides clear repair options so you can compare the cost of repair against the long-term value of replacement.

How much does furnace repair cost in Chesterfield, MO?

Furnace repair costs in Chesterfield vary based on the part, the age of the system, and the complexity of the repair. As a general guide, an ignitor replacement typically runs $180 to $350, a flame sensor $180 to $340, a capacitor $150 to $450, and a blower motor $500 to $1400+ or more depending on accessibility and motor type. More serious problems involving control boards ($700 to $1650), gas valves, or heat exchangers ($2,000 to $4,000) can cost significantly more and may raise the question of whether replacement is the better long-term choice. Martin-Jetco Heating and Air Conditioning diagnoses the issue, explains the repair options, and helps you decide whether the furnace is worth repairing based on safety, comfort, efficiency, and system age.

Why is my AC running but not cooling my Chesterfield home?

If your air conditioner is running but not cooling, the cause could be a dirty air filter, low refrigerant, a frozen evaporator coil, a failing capacitor, a dirty outdoor condenser coil, ductwork problems, thermostat issues, or an aging system that can no longer keep up with Missouri humidity. In Chesterfield homes with larger floor plans or open layouts, airflow and system sizing can also play a role. Our NATE-certified technicians can help diagnose the problem. Call (636) 205-1631 to schedule a repair visit today.

Why is my furnace blowing cold air?

A furnace may blow cold air for several reasons, including a dirty filter, a thermostat setting issue, a pilot or ignition problem, a flame sensor issue, a gas supply problem, an overheating limit switch, or a malfunctioning control board. In some cases, the blower keeps running even though the burners are not producing heat. Because furnace problems can involve gas, combustion, and safety components, the issue should not be ignored. Martin-Jetco Heating and Air Conditioning can inspect the furnace, identify the cause, explain the repair options, and confirm the system is operating safely before returning it to regular use.

Are heat pumps effective during Missouri winters?

Yes, modern heat pumps can be effective in Missouri's climate, and they are increasingly popular because they provide both heating and cooling in one efficient system. Heat pumps work especially well during mild and moderate winter weather, and many newer models perform better in colder temperatures than older units did. For some Chesterfield homes, a dual-fuel setup or a supplemental heat source may be recommended for the coldest days of the year. Martin-Jetco Heating and Air Conditioning can evaluate the home, comfort goals, insulation, ductwork, and energy usage to determine whether heat pump services are the right fit.

How often should HVAC maintenance be performed?

Most homes should have HVAC maintenance performed twice a year: once in the spring for the air conditioning system and once in the fall for the heating system. Regular maintenance improves efficiency, reduces unexpected breakdowns, extends equipment life, protects warranty coverage, and catches small issues before they become costly repairs. In Chesterfield, where air conditioners work hard through humid summers and furnaces are needed during winter cold snaps, seasonal maintenance carries added weight. The Martin-Jetco Heating and Air Conditioning Home Comfort Agreement keeps heating and cooling equipment inspected, cleaned, and ready before peak seasonal demand.

Have Questions About Your HVAC System in Chesterfield?

Whether you are comparing repair versus replacement, pricing a new air conditioner, dealing with an emergency breakdown, or planning ahead with maintenance, Martin-Jetco Heating and Air Conditioning can help. Call (636) 205-1631 or schedule an in-home evaluation today.