HVAC Company Serving Frontenac, MO

Frontenac covers less than three square miles, but its homes can bring very different HVAC needs from one property to the next. The city has many established homes on larger lots, including properties built, renovated, expanded, or updated across several decades.

A ranch home with a finished lower level, a larger estate with additions, a detached guest house, or a property shaded by mature trees can all place different demands on the HVAC system. The issue may be equipment age, ductwork, airflow, sizing, humidity control, or a combination of several things.

Martin-Jetco Heating and Air Conditioning has served West County properties since 1964 and remains family-owned. Every visit is handled by a licensed, NATE-certified technician who looks at the full property before recommending repair, replacement, maintenance, or an upgrade. 

Message us online or call (636) 205-1631 to schedule HVAC service in Frontenac and get clear answers before any repair, replacement, or maintenance work begins.

How Martin-Jetco Heating and Air Conditioning Can Help: Cooling & Heating Solutions

• Cooling: AC repair, AC installation, and AC replacement
• Heating: Furnace repair, furnace installation, furnace replacement, and heat pump services
• Targeted solutions: Ductless mini-splits for guest cottages, pool houses, and converted outbuildings
• Air quality: Indoor air quality upgrades including whole-home filtration, air scrubbers, humidifiers, and dehumidifiers
• Keeping systems current: HVAC maintenance and pre-season tune-ups across single and multi-system properties
• Urgent work: Emergency HVAC service at any hour
• Specialty and commercial: Boilers, geothermal systems, and commercial HVAC

Martin-Jetco Heating and Air Conditioning installs all major HVAC brands, including York, Goodman, Daikin, Carrier, and Trane, so the recommendation is based on your home and budget rather than a single product line. Financing is available for qualifying projects.

How Much Does an HVAC Replacement Cost in Frontenac?

Two ranges cover the majority of residential HVAC replacements in Frontenac:

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

What pushes a project toward the upper range:

• Total conditioned square footage and tonnage required
• Ductwork that needs sealing, modification, or replacement
• High-efficiency variable-speed equipment chosen for long-term performance
• Zoning systems for multi-wing or multi-level properties
• Electrical or code updates before installation can proceed
• Indoor air quality equipment added to the project
• Complex access in finished or architecturally detailed spaces

For Frontenac homeowners, an AC replacement with evaporator coil typically runs approximately $5,500 to $9,200, while a complete HVAC system replacement generally falls in the $8,450 to $22,990 range or higher. On a larger property where multiple systems are involved, or where ductwork needs attention alongside the equipment, the estimate reflects that full scope. A visit is the only way to size the job correctly.

For a replacement price that reflects the full scope of your Frontenac home, call (636) 205-1631 or request an in-home evaluation online.

How Much Will It Cost to Repair Your HVAC System?

If your system is acting up, it helps to know what common repairs can cost before you schedule service. The final price depends on the part, the system, access to the equipment, and what the technician finds during the diagnosis, but these ranges can give you a realistic starting point.

• Capacitor: $150 to $450 
• Thermostat: $100 to $600 
• Ignitor replacement: $180 to $350 
• Flame sensor: $180 to $340 
• Furnace capacitor: $150 to $350 
• Blower motor: $500 to $1,400+ 
• Evaporator coil: $600 to $2,000 
• Control board: $700 to $1,650 
• Heat exchanger: $2,000 to $4,000 
• Compressor-related failures: well over $1,000

Trying to plan for an HVAC repair? Call (636) 205-1631 to request an estimate. We always give homeowners a clear repair cost before any work begins.

For Urgent HVAC Service, Call (636) 205-1631

When heating or cooling goes down in Frontenac, waiting days for help is not an option. Martin-Jetco Heating and Air Conditioning offers emergency HVAC service at any hour, including evenings, weekends, and holidays.

Homeowners who call in the morning typically have a technician at the door the same day, often that afternoon or sooner. The technician diagnoses the problem on site and walks you through the options before any work is authorized or priced. Repair quotes follow the same visit, so nothing stalls while you wait on numbers. Most issues are resolved within 24 to 48 hours of first contact.

System down at your Frontenac property? Call (636) 205-1631 now.

Offsetting the Cost of HVAC Repairs & Replacements

During the in-home evaluation, Martin-Jetco Heating and Air Conditioning reviews every available option for bringing the project cost down:

• Financing for qualifying projects
• Utility rebates filed on your behalf at installation
• Federal energy-efficiency tax credits on qualifying heat pumps, furnaces, and AC systems
• Current seasonal offers

Equipment cost, payment options, and savings are all presented together before you commit to anything.

HVAC Issues We Often See in Frontenac Homes

Frontenac homes often need a closer look than a standard HVAC visit allows. Many properties are larger, have been added onto over the years, or have more than one heating and cooling system. That can affect how well the home heats, cools, and manages humidity.

A few things we often look for in local homes:

• Homes that have grown over time. A house may have started with one layout, then gained an addition, finished basement, sunroom, or extra living space later. If the HVAC system was sized for the original home, it may struggle to keep up with the way the house is used now. 
• More than one system on the property. Larger homes often have separate systems for different floors, wings, or living areas. One system may be newer while another is getting close to replacement, which can make repair and maintenance decisions more complicated. 
• Detached spaces that need their own comfort plan. Guest houses, pool houses, workshops, and converted outbuildings usually are not connected to the main HVAC system. In many cases, a ductless mini-split is the simplest way to heat and cool those spaces. 
• Landscaping around outdoor equipment. Mature trees and thick plantings give Frontenac properties a lot of character, but they can also crowd outdoor AC units. If the condenser does not have enough open space around it, the system may have to work harder during hot weather. 
• Finished basements and lower levels that feel different from the rest of the home. Lower levels can feel damp in summer and dry in winter, even when the main floors are comfortable. Sometimes the issue is airflow, humidity control, insulation, or a system that was never planned around that part of the house. 

If any of this sounds familiar, call (636) 205-1631 or schedule an HVAC diagnostic visit online. A technician can look at the full property and explain what your system needs.

Neighborhoods & Areas We Serve in Frontenac

Martin-Jetco Heating and Air Conditioning serves homeowners and businesses throughout Frontenac, including the 63131 zip code and neighboring West County communities. Service is available across established residential areas and streets such as Frontenac Estates, Villa Coublay, Radcliffe, Jaccard Lane, and Countryside Lane, as well as homes and businesses near Plaza Frontenac and the Geyer Road corridor.

The team also serves families connected to nearby schools, including Conway Elementary, Ladue Middle School, Ladue Horton Watkins High School, St. Joseph’s Academy, Villa Duchesne, and Chaminade College Prep, along with homes near Frontenac’s borders with Ladue, Creve Coeur, Town and Country, and Huntleigh.

Keeping Multi-System Properties Running Well

On a Frontenac property with more than one HVAC system, staying current with maintenance is more consequential than on a single-system home. A developing problem in one unit can affect how the others are working to compensate. The Martin-Jetco Heating and Air Conditioning Home Comfort Agreement covers every system with pre-season visits and a set of member benefits:

• Two visits per system annually, timed before each peak season
• Full equipment inspection at each visit, with problems caught before they become failures
• 20% off parts and labor on repairs between scheduled visits
• No rate increase for evening or weekend calls
• Front-of-line scheduling for unplanned service
• Reduced diagnostic fee for calls during regular business hours
• Documented maintenance satisfying most manufacturer warranty requirements

Ask about the Home Comfort Agreement when you call (636) 205-1631.

Frequently Asked Questions

What zip code does Martin-Jetco Heating and Air Conditioning serve in Frontenac?

Martin-Jetco Heating and Air Conditioning serves Frontenac and the 63131 zip code, along with neighboring West County communities.

My home has two HVAC systems. Do both need to be replaced at once?

Not necessarily, but it is worth evaluating both when one fails. When systems on the same property are aging at similar rates, aligning their replacement schedules over a short window simplifies maintenance and avoids addressing the same decision twice within a year or two. When one is failing and the other has meaningful life left, replacing only the failing unit often makes more sense. Martin-Jetco Heating and Air Conditioning evaluates both systems and lays out the practical and financial case for each approach before recommending anything.

Can you add heating and cooling to a pool house or guest cottage?

Yes. Detached structures that cannot realistically be connected to the main home's duct system are well served by a dedicated ductless mini-split, which heats and cools the space independently. The sizing depends on the structure's square footage, insulation, and how often it is used.

How much does it cost to replace an HVAC system in Frontenac?

An AC replacement with evaporator coil runs approximately $5,500 to $9,200. A complete HVAC replacement runs approximately $8,450 to $22,990 or more. On a larger Frontenac property the total also reflects ductwork condition, the number of systems involved, zoning requirements, and equipment access. Call (636) 205-1631 or request an estimate online for a number based on your specific property.

How much does AC repair typically cost in Frontenac?

Capacitors run $150 to $450 and thermostats $100 to $600 on the lower end. Blower motor replacements are $500 to $1,400 or more, evaporator coil problems $600 to $2,000, and compressor failures typically exceed $1,000 by a significant margin. Martin-Jetco Heating and Air Conditioning presents the repair cost alongside the replacement cost so you have both before making a decision. Call (636) 205-1631 to request an HVAC repair estimate.

How much does furnace repair typically cost in Frontenac?
Ignitor replacement runs $180 to $350, flame sensor cleaning $180 to $340, and a furnace capacitor $150 to $350. Blower motors are $500 to $1,400 or more, control boards $700 to $1,650, and heat exchangers $2,000 to $4,000. At those higher figures, furnace replacement is worth looking at directly. Call (636) 205-1631 and a technician will give you both options after diagnosing the problem.

My AC is running but parts of the house are still warm. What is the cause?

In a larger Frontenac home, this is more often a ductwork or zoning issue than an equipment failure. A system sized for the main living areas may not deliver adequate airflow to a wing or level added in a later renovation. Dense landscaping around the outdoor unit can also raise the effective load on the condenser. A technician should check refrigerant levels, measure airflow at individual registers, and review the duct distribution before any AC repair is scheduled.

What causes a furnace to blow cold air?

The blower motor can stay running after the burners shut off due to a limit switch trip, control board fault, or ignition failure, which is why the air coming out feels cold even though the system appears to be on. A dirty filter, gas supply interruption, or flame sensor problem can produce the same symptom. Because gas and combustion components are involved, call (636) 205-1631 for a proper diagnosis rather than resetting the system repeatedly. The technician will confirm it is safe before leaving.

Are heat pumps a good fit for Frontenac homes?

For the right property, yes. Martin-Jetco Heating and Air Conditioning offers heat pump services for homeowners who want heating and cooling from one system. Current models handle Missouri winters considerably better than older designs did. For larger Frontenac homes with higher peak heating loads, a dual-fuel setup pairing a heat pump with a gas furnace for the coldest days is often the more practical configuration. The evaluation covers insulation, ductwork condition, energy use, and comfort goals.

How often do HVAC systems on a Frontenac property need to be serviced?

Twice a year per system is the right frequency, once ahead of cooling season and once before heating season begins. On a property running two or more systems, that means each unit gets its own pre-season inspection. 

Is financing available?

Yes. Financing options are available for qualifying projects, and the team reviews Spire rebates, applicable federal energy-efficiency tax credits, and any current seasonal offers during the evaluation. You see the full cost picture alongside payment options before making a commitment.

Let's Talk About Your Heating & Cooling Needs

Whether the priority is replacing a failing system, addressing comfort gaps in a renovated or expanded home, setting up heating and cooling in a detached structure, or simply getting ahead of the next season, Martin-Jetco Heating and Air Conditioning can help you work through what the property needs. Call (636) 205-1631 or schedule your evaluation online.