HVAC Company Serving Eureka, MO

What Should You Expect to Pay for HVAC Replacement in Eureka?

When repair no longer makes sense, replacement in Eureka generally falls into two ranges:

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

The single biggest influence on where you land is sizing. A system matched correctly to your home's square footage and layout runs efficiently and lasts longer, while one that is oversized or undersized costs you in comfort and energy bills for years. After sizing, the main drivers are:

• The efficiency rating, or SEER2, you choose
• Single-stage versus variable-speed equipment
• The condition of your existing ductwork

Older homes near the Route 66 corridor, homes with finished lower levels, wooded lots, and properties closer to the Meramec can all affect the replacement plan. Depending on the system and the home, the right recommendation may involve airflow improvements, indoor air quality upgrades, equipment placement, or long-term AC replacement and furnace replacement planning. 

Several options also bring the total down: Martin-Jetco Heating and Air Conditioning offers financing, files utility rebates on your behalf at installation, helps you claim federal energy-efficiency tax credits on qualifying equipment, and runs seasonal coupons. 

An in-home evaluation remains the only way to get a firm figure, since it lets us size the system and price the exact work your home calls for. Schedule an in-home evaluation online or by calling (636) 205-1631.

Repair It Once More, or Replace It?

There is no single rule, but a few thresholds make the choice clearer. 

• Most air conditioners and furnaces give 12 to 15 dependable years, and once a system passes that mark, repair costs tend to climb while efficiency slips. 
• Equipment still running on R-22 refrigerant is another signal, since that refrigerant is no longer produced and has become costly to service. 
• When a single repair starts approaching a third of the price of a new system, putting that money toward replacement usually pays back within a few years through lower bills and fewer service calls. 

If a repair is genuinely the better value, that is what we will recommend. Not sure which way to go? Request an in-home diagnostic visit onlineor call (636) 205-1631.

Need Emergency Service? Call (636) 205-1631.

A furnace down on a cold night, or an air conditioner that fails during a peak-summer heat wave, cannot wait days. We offer same-day and emergency HVAC service in Eureka, including evenings, weekends, and holidays.

Here is the kind of turnaround you can expect:

• Calls are answered any time, not just during business hours
• A NATE-certified technician is often dispatched within a couple of hours of your call, depending on schedule and weather
• The technician diagnoses the issue on site and explains what is happening before any work begins
• A repair quote comes with the same visit, so nothing stalls while you wait on numbers
• Most issues are resolved within 24 to 48 hours of the first call

No heat or no cooling right now? Contact us online for emergency HVAC serviceor call (636) 205-1631.

One Company for Heating, Cooling, & the Air You Breathe

You do not need a separate contractor for every comfort problem. Family-owned and operated since 1964, Martin-Jetco Heating and Air Conditioning brings licensed, NATE-certified technicians and decades of local HVAC experience to every service call, including:

• AC Repair
• AC Installation
• AC Replacement
• Furnace Repair
• Furnace Installation
• Furnace Replacement
• Heat Pump Services
• Indoor Air Quality
• Ductless Mini-Splits
• HVAC Maintenance
• Emergency HVAC Service

Want to learn about how we work? We invite you to check out our 1,000+ 5-star Googe reviews.

What Eureka's Older, Wooded, & Flood-Prone Homes Need

Eureka homes are not all built the same. We’ve been serving this community since 1964, and our team has grown familiar with the HVAC needs that come up most often, including:

• Older homes near historic downtown and the Route 66 corridor often still run on ductwork and insulation installed decades ago, sized for a different system than what's there now. A replacement here is a chance to correct sizing and airflow issues that have been there since the original install.
• Wooded and sloped lots, common in subdivisions like The Bluffs and Hilltop, mean heavier leaf and pollen load on outdoor equipment and tree cover that affects how much sun hits the house. Both factor into proper sizing and how often filters and coils need maintenance.
• Finished basements and lower levels, common throughout Eureka's newer subdivisions, often were not accounted for in the original duct design, which is why a finished lower level can feel damp or uncomfortable even when the rest of the house is fine.
• Rural and larger-lot properties, especially toward Hoene Springs and the area along Highway W, sometimes run on propane or have ductwork that was extended informally over the years.
• Properties near the Meramec River face a flooding risk that inland homes do not. Low-lying parts of Eureka have dealt with flooding before, and floodwater can damage furnaces, air handlers, and other equipment installed in basements or lower levels. We work with restoration companies, so when water damage affects an HVAC system, we can help replace the equipment and get the home comfortable again.

Not sure what your home needs? Martin-Jetco Heating and Air Conditioning can take a closer look and walk you through the options. Book an in-home evaluation or call (636) 205-1631.

Cleaner Air for Older & Tree-Shaded Homes

Eureka’s trees, hills, and river access are part of the area’s character, but they can also add comfort challenges indoors. Pollen, dust, humidity, and musty lower-level air can all affect how a home feels, especially when ductwork, filtration, or ventilation is not keeping up.

Older homes near historic downtown and the Route 66 corridor may have ductwork or insulation conditions that need a closer look. Homes near wooded lots, sloped properties, or lower-lying areas near the Meramec may have different humidity and airflow concerns than newer homes closer to Highway 109 or Forby Road. 

Martin-Jetco Heating and Air Conditioning handles indoor air quality right alongside heating and cooling, with options like whole-home filtration, humidity control, and duct cleaning. A system replacement is usually the most cost-effective time to address the air too, since the equipment is already open and the ductwork is accessible.

Dealing with dust, humidity, or allergy concerns at home? Our NATE-certified technicians can help you find the right solution. Contact us online or call (636) 205-1631.

Neighborhoods & Areas We Serve in Eureka

Martin-Jetco Heating and Air Conditioning serves homeowners throughout Eureka, including the 63025 zip code and surrounding Meramec Valley communities, with extensive experience across the area's neighborhoods and subdivisions. Over the past 12 months, our technicians, comfort advisors, and installers completed more than 148 service calls in Eureka, including emergency repairs, preventative maintenance, diagnostics, indoor air quality services, and HVAC system replacements.

Service is available for homes and businesses in and around The Legends, Legends Country Club, Mirasol, The Bluffs, Hoene Springs, Hunters Green, Rockwood Parc, Arbors of Rockwood, Hilltop, Elk Trails, Emerald Forest, and Twin Rivers Estates, as well as historic downtown Eureka, the Route 66 corridor, Central Avenue, Fifth Street, Forby Road, Williams Road, Highway 109, Highway W, the I-44 corridor, Rockwood Reservation, the Six Flags St. Louis area, Route 66 State Park, and West Tyson County Park.

Beyond Single-Family Homes: Commercial HVAC in Eureka

Martin-Jetco Heating and Air Conditioning also handles HVAC for Eureka's larger and commercial properties, including retail and office spaces, multi-unit buildings, and the schools that serve Eureka families, such as Eureka Elementary School, Eureka High School, LaSalle Springs Middle School, and Rockwood Summit High School. 

Whether the issue is a classroom or office that will not hold temperature, or a larger rooftop unit serving a gym, cafeteria, or retail floor, the process starts the same way: diagnose the actual problem, then recommend maintenance, repair, or replacement based on what the building needs.

Actual recommendations depend on the system, the home, and the homeowner’s goals. Every visit starts with a diagnosis, clear options, and room to compare repair, replacement, maintenance, or indoor air quality improvements. Schedule an in-home evaluation online or by calling (636) 205-1631.

A Family Company Eureka Has Counted on Since 1964

Martin-Jetco Heating and Air Conditioning has kept homes and businesses comfortable for six decades, and it is still family-owned and operated. Every technician who works on your system is licensed and NATE-certified, the leading independent credential in the trade, and they install equipment from York, Goodman, Daikin, Carrier, and Trane, so your recommendation fits your home rather than a single brand.

The record is straightforward to verify:

• More than 1,000 five-star Google reviews
• An A+ rating with the Better Business Bureau
• Six Angie's List Super Service Awards
• Named York Dealer of the Year many years running

You will not run into high-pressure sales tactics, and if something is off after a job, the team comes back, takes responsibility, and corrects it without being asked twice. 

The Home Comfort Agreement: Maintenance Before Each Season

A system rarely fails on a mild day. It gives out during the first real heat wave or the first hard freeze, when it is working hardest and you can least afford to wait. The Martin-Jetco Heating and Air Conditioning Home Comfort Agreement is built around getting ahead of that, with one visit in spring to ready your air conditioner and one in fall to prepare your furnace before the demand arrives. During each visit, a technician cleans the seasonal equipment, runs a full safety and performance check, and flags any developing problem along with your options before it becomes a breakdown.

Membership also comes with year-round perks:

• Priority service when you need a technician
• A discounted diagnostic fee on service calls during office hours
• 20% off parts and labor on service repairs
• No overtime fees
• Lower energy use from a system kept running at peak efficiency
• A reduced risk of expensive major repairs down the road

One more practical reason to keep up with it: most manufacturers require documented annual maintenance to honor their warranty, so membership protects the coverage on the system you have invested in.

Get the right fix, the right fit, and a more comfortable home. Call (636) 205-1631 or schedule your HVAC visit online.

Frequently Asked Questions

What zip code do you serve in Eureka? 

Martin-Jetco Heating and Air Conditioning serves Eureka and the 63025 zip code, along with the surrounding West County and Meramec valley communities.

Can you replace a system damaged by flooding?

Yes. Martin-Jetco Heating and Air Conditioning can evaluate and replace furnaces, air handlers, and complete HVAC systems damaged by water. Floodwater can affect safety, electrical components, motors, controls, and long-term reliability, so the system should be inspected before regular use continues.

How much does HVAC replacement cost in Eureka?

An air conditioner and evaporator coil replacement runs approximately $5,500 to $9,200, while a complete HVAC system replacement runs approximately $8,450 to $22,990+. Home size, proper sizing, SEER2 efficiency rating, equipment type, ductwork condition, zoning needs, electrical or code updates, indoor air quality add-ons, and installation accessibility all affect where the estimate lands.

How much does AC repair cost in Eureka, MO?

AC repair costs in Eureka can vary widely depending on the problem. Minor repairs such as capacitors ($150 to $450), contactors, or thermostats ($100 to $600) tend to fall on the lower end. More involved repairs, such as refrigerant leaks, evaporator coil problems ($600 to $2,000), or compressor-related failures, can run well over $1,000. System age, refrigerant type, parts availability, and overall equipment condition can also affect the recommendation. Martin-Jetco Heating and Air Conditioning provides clear AC repair options so homeowners can compare repair cost against the long-term value of replacement.

How much does furnace repair cost in Eureka, MO?

Furnace repair costs in Eureka depend on the part, system age, and 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. Bigger repairs, such as a heat exchanger ($2,000 to $4,000) or control board ($700 to $1650), cost significantly more. Martin-Jetco Heating and Air Conditioning diagnoses the issue, explains the repair options, and helps homeowners decide whether furnace repair or furnace replacement is worth it. Call (636) 205-1631 or book an in-home furnace evaluation online.

How long does a new HVAC system last?

With regular maintenance, a quality HVAC system typically lasts 12 to 15 years, and some systems can last longer when they are properly sized, installed, and serviced. Eureka's humid summers, winter temperature swings, wooded areas, and lower-level humidity concerns can place steady demand on heating and cooling equipment. Spring AC tune-ups, fall heating inspections, regular filter changes, clean coils, and prompt attention to small issues can help extend equipment life, improve efficiency, reduce breakdowns, and protect manufacturer warranty coverage.

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 affordable and the system has been reliable. Replacement becomes the stronger 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, explains repair cost, replacement cost, comfort concerns, and long-term value so homeowners can make a decision without pressure.

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

An air conditioner that runs but does not cool may have 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 Eureka homes with finished lower levels, larger layouts, or wooded lots, airflow, humidity, and system sizing can also play a role. A technician should inspect the system, check refrigerant levels, measure airflow, evaluate the coil and condenser, and determine whether the issue is a simple AC repair or a sign of a larger system problem.

Why is my furnace blowing cold air?

A furnace may blow cold air because of a dirty filter, thermostat setting issue, pilot or ignition problem, flame sensor issue, gas supply problem, overheating limit switch, or malfunctioning control board. In some cases, the blower may continue running even though the burners are not producing heat. Because furnace problems can involve gas, combustion, and safety components, homeowners should not ignore the issue. We can inspect your equipment through an in-house furnace evaluation. Book online or by calling (636) 205-1631.

Are heat pumps effective during Missouri winters?

Yes, modern heat pumps can be effective in Missouri's climate 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 systems are designed to perform better in colder temperatures than older models. For some Eureka homes, a dual-fuel setup or supplemental heat source may be recommended for the coldest days of the year. We can review your home, comfort goals, insulation, ductwork, and energy usage to determine whether a heat pump is 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 helps improve efficiency, reduce unexpected breakdowns, extend equipment life, protect warranty coverage, and identify small issues before they become expensive repairs. In Eureka, where air conditioners work through humid summers and furnaces are needed during winter cold snaps, seasonal maintenance is especially important.

Do you offer same-day or emergency HVAC service?

Yes. Same-day and emergency HVAC service are available, including evenings, weekends, and holidays. Timing depends on the schedule, weather, technician availability, location, and the repair itself, but calling earlier gives us the best chance of getting someone to your home the same day. Call (636) 205-1631 any time.

How can I lower the cost of a new HVAC system?

During your in-home evaluation, our NATE-certified technicians review available savings options, which may include financing, Spire rebates, federal energy-efficiency tax credits for qualifying equipment, and current seasonal offers.

Let’s Find the Right HVAC Solution for Your Eureka Home

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