HVAC Company Serving Fenton, MO

Martin-Jetco Heating and Air Conditioning is headquartered at 1327 West Lark Industrial Drive in Fenton, which means when you call for service in South St. Louis County, the team is already nearby. We have been family-owned since 1964 and handle every type of HVAC call, from routine tune-ups to same-day emergency repairs. Our licensed, NATE-certified technicians look at the full system before recommending anything.

Need HVAC Service Today?

• Based in Fenton
• Same-Day Appointments Available
• Emergency Service 24/7
• Licensed, NATE-Certified Technicians
• Family-Owned Since 1964
• 1,000+ Five-Star Google Reviews
• Financing Available

Whether your system needs repair, replacement, maintenance, or emergency service, Martin-Jetco Heating and Air Conditioning is right here in Fenton. Call (636) 205-1631 or schedule service online today.

Fenton HVAC Quick Answers

• Emergency HVAC? Yes, available 24/7 
• Same-day service? Often available for morning calls 
• Headquartered in Fenton? Yes, 1327 West Lark Industrial Drive 
• Repair all brands? Yes 
• Ductless Mini-Splits? Yes 
• Commercial HVAC? Yes 
• Heat Pumps? Yes 
• Serving 63026? Yes 
• Financing? Yes

Martin-Jetco Heating and Air Conditioning Is Based in Fenton

Most HVAC companies serving South St. Louis County dispatch from elsewhere in the region. Martin-Jetco Heating and Air Conditioning starts the day in Fenton. Our office is at 1327 West Lark Industrial Drive, which means our technicians are already here when you call.

• Faster response times. Our technicians are not driving across the county to reach you. For many Fenton calls, we are at the door within a few hours.
• Better knowledge of local neighborhoods. Our team works in Fenton homes every week. We know the housing stock near Gravois Bluffs, the older ranches off Bowles Avenue, and the construction patterns in San Simeon Estates and Wintergreen Estates.
• Familiarity with common local issues. Ductwork problems, Meramec River humidity, and finished lower-level comfort complaints are things our technicians see regularly in this specific community.
• Shorter drive times mean faster emergency response. When a furnace goes out overnight in January, being five minutes away instead of forty-five is the difference between a long night and a solved problem.

What HVAC Services Are Available in Fenton?

• AC Repair
• AC Installation
• AC Replacement
• Furnace Repair
• Furnace Installation
• Furnace Replacement
• Heat Pump Services
• Ductless Mini-Splits
• Indoor Air Quality
• HVAC Maintenance
• Emergency HVAC Service
• Boilers, geothermal systems, and commercial heating and cooling

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 HVAC Replacement Cost in Fenton?

Most residential replacements in Fenton fall into one of two ranges:

• AC Replacement with evaporator coil - approximately $5,500 to $9,200
• Complete HVAC system (furnace and AC) - approximately $8,450 to $22,990 or more

What affects where your project lands:

• Home square footage and the tonnage the system requires
• Ductwork condition, including whether it needs sealing, resizing, or replacement
• Standard versus high-efficiency variable-speed equipment
• Zoning for multi-level homes or finished lower levels
• Electrical or code updates required before installation
• Indoor air quality additions included in the project
• Equipment access in finished basements or tight mechanical spaces

An AC replacement with evaporator coil typically runs approximately $5,500 to $9,200, while a complete HVAC system replacement ranges from $8,450 to $22,990 or more. Our in-home evaluation produces a price tied to your specific home and what it actually needs. Schedule an evaluation online or call (636) 205-1631.

What Does HVAC Repair Cost in Fenton?

Having a reference point before our technician arrives helps you evaluate a quote and make a clear decision:

• 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

After diagnosing the system, our technician gives you the exact cost and explains how it compares to AC replacement or furnace replacement before recommending a direction. Call (636) 205-1631 or message us online to schedule an in-home diagnosis today.

Can I Get Same-Day or Emergency HVAC Service in Fenton?

Yes. Because Martin-Jetco Heating and Air Conditioning is based in Fenton, response times to local calls are often faster than they would be from a company dispatching from across the county.

Emergency HVAC service is available around the clock, including evenings, weekends, and holidays. For morning calls, same-day service is the typical outcome. Evening and weekend calls are dispatched without waiting until the next business day.

On every emergency visit:

• Our technician diagnoses the problem on site before any work begins
• You receive a firm repair cost before authorizing anything
• Most repairs are completed during that same visit
• When parts need to be sourced, the repair is typically scheduled within 24 to 48 hours

When to Call (636) 205-1631 for Emergency HVAC Service

Some situations need same-day attention. Based on the calls our technicians respond to regularly in Fenton, these are the ones that should not wait:

• No heat when outdoor temperatures are dropping overnight. January nights in Fenton average around 25°F, and a house without working heat can drop to uncomfortable or unsafe temperatures within a few hours of a furnace going out. We take overnight heating failures seriously because by morning, the damage to comfort and sometimes to pipes is already done.
• AC failed and indoor temperatures are climbing. Once cooling stops on a hot Missouri day, interior temperatures in a closed home can reach dangerous levels within hours, particularly for older adults, young children, or anyone with health concerns.
• Burning smells or unusual mechanical sounds can signal electrical or mechanical failures. Homeowners who wait to address these warning signs often face more extensive repairs than those who call right away.
• A commercial system down during business hours. Every hour of downtime at a business has operational and financial consequences. Our technicians treat commercial emergency calls with the same urgency as residential ones.

System down right now? Call (636) 205-1631.

How Can I Reduce What a New System Costs?

Several programs help bring the out-of-pocket cost of a replacement down. Our technicians review all of them during the in-home evaluation:

• Financing for qualifying projects, turning the total into a fixed monthly payment
• Spire utility rebates on eligible higher-efficiency equipment, filed by our team at installation
• Federal energy-efficiency tax credits on qualifying heat pumps and high-efficiency furnaces
• Seasonal promotions when available at the time of your estimate

You see equipment cost, payment options, and applicable savings together before deciding.

Why Homes Near the Meramec Feel Humid

Fenton borders the Meramec River, and homes in lower-lying areas near the river and along the Meramec Greenway deal with ambient moisture levels that are higher than on drier, elevated ground. For homeowners in these areas, that moisture creates specific HVAC challenges that go beyond what the thermostat can address.

• Oversized AC systems short-cycle without dehumidifying. A unit that is too large for the home cools the air temperature quickly and shuts off before running long enough to pull moisture out. The thermostat reads correctly, but the air still feels damp and uncomfortable. This is one of the most common complaints our technicians hear in Fenton homes near the river corridor.
• Finished basements hold river-area humidity independently. Even when the main floor is comfortable, lower levels in homes near the Meramec accumulate moisture that the upstairs system was never designed to manage. A whole-home dehumidifier, a ductless mini-split for the lower level, or a targeted indoor air quality solution is often what finally resolves a persistent lower-level humidity problem.
• Runtime matters as much as temperature. A system needs to run full cooling cycles to dehumidify properly. When runtime is cut short by oversizing, every cycle leaves humidity behind. Our technicians check runtime patterns alongside refrigerant charge and airflow as part of every evaluation.
• Indoor air quality upgrades work with the system. Whole-home filtration, air scrubbers, and humidity control give a more complete picture of indoor comfort for Fenton homes near the river, not just the temperature reading.

Call (636) 205-1631 or schedule a visit if humidity has been a persistent issue in your home.

Finished Basements in Fenton: Why They Never Feel Quite Right

Walkout lower levels and finished basements are common throughout Fenton's established neighborhoods, and they are also one of the most consistent comfort complaints our technicians hear. 

The reason is almost always the same: the original duct system was never designed to condition that space. When a home's lower level was finished years after original construction, the duct system rarely got extended to match. The lower level relies on whatever conditioned air drifts down from above, which is not enough to heat or cool a finished game room, bedroom, or home office consistently.

Solutions depend on the space and the existing system:

• Duct extensions connect the lower level to the existing system where the layout and capacity allow it
• Air balancing redistributes supply air throughout the home when the system has capacity but distribution is off
• Zoning systems give the lower level its own thermostat and control, independent of what the main floor is doing
• Ductless mini-splits provide independent heating and cooling for a finished lower level without relying on the main system to reach it, the most practical solution when duct extension is not feasible

Our technicians evaluate the existing ductwork, system capacity, and lower-level layout before recommending which approach fits the specific home.

Lower level always uncomfortable? Call (636) 205-1631 or schedule a diagnostic visit.

What Our Technicians See in Fenton Every Week

Because our office is in Fenton, our technicians work on homes here every week. One of the most common things we see is homeowners replacing an aging furnace without realizing the original ductwork is limiting the performance of the new equipment. That is why we evaluate airflow before recommending replacement.

Beyond the ductwork issue, here are the patterns that come up most often on our Fenton calls:

• Older ductwork paired with newer equipment. Ductwork sized for older systems limits what a modern high-efficiency unit can deliver. Weak airflow, uneven temperatures, and efficiency losses all trace back to a distribution system that was never updated alongside the equipment.
• AC systems that cool but do not dehumidify. Fenton's summer climate, with July averages around 90°F and humidity in the mid-60% range, puts steady demand on cooling equipment. An oversized system shuts off before completing dehumidification cycles, leaving the home cool but clammy.
• Emergency calls during peak weather. January nights in Fenton average around 25°F, and summer heat puts heavy demand on older AC systems. Breakdowns tend to happen when equipment is under the most stress, which is why pre-season HVAC maintenance and early repair calls matter.

Neighborhoods & Areas We Serve

Martin-Jetco Heating and Air Conditioning serves homeowners and businesses in Fenton and nearby communities within the broader 63026 zip code.

The team serves homes near Olde Towne Fenton, Route 30, Bowles Avenue, Hawkins Road, and the Meramec River, as well as established residential areas including San Simeon Estates, Wintergreen Estates, and neighborhoods near Gravois Bluffs and the Summit at Gravois Bluffs. Service is also available near Fenton City Park, Riverside Park, the Meramec River Greenway, Bud Weil Memorial Park, John Fabick Nature Preserve, the Fenton Meramec Boardwalk, the RiverChase YMCA on Gravois Road, and the Soccer Park complex near the Valley Park border.

For commercial and light industrial properties, Martin-Jetco Heating and Air Conditioning serves the Interstate 44 corridor, Gravois Road, West Lark Industrial Drive, the Chrysler area, the Fabick CAT campus, and the Maritz corporate campus. Families connected to Rockwood School District and Lindbergh School District schools in the Fenton area can reach Martin-Jetco Heating and Air Conditioning for HVAC service throughout the local service area.

Why Fenton Homeowners Choose Martin-Jetco Heating and Air Conditioning

• Headquartered in Fenton at 1327 West Lark Industrial Drive
• Family-owned since 1964
• Licensed, NATE-certified technicians on every job
• 1,000+ five-star Google reviews from homeowners across the region
• York Dealer of the Year, multiple times
• Same-day service available for most morning calls
• Emergency service 24/7, including evenings, weekends, and holidays
• Financing available for qualifying projects

A Maintenance Plan That Keeps Systems Running Year-Round

The Martin-Jetco Heating and Air Conditioning Home Comfort Agreement keeps your system inspected before each peak season rather than after a breakdown. For Fenton homeowners with 1970s through 1990s equipment and ductwork that has never been fully evaluated, pre-season maintenance is the most reliable way to catch developing problems early.

Membership includes:

• Pre-season visits before cooling and heating demand each year
• Complete safety and performance inspection at each visit
• 20% off parts and labor on repair work between scheduled visits
• No premium for after-hours or weekend calls
• Priority scheduling when an unplanned service need comes up
• Reduced diagnostic fee on calls during regular business hours
• Documented HVAC maintenance records satisfying most manufacturer warranty requirements

Call (636) 205-1631 to add the Home Comfort Agreement to your next service visit.

Who Shows Up at Your Door

Martin-Jetco Heating and Air Conditioning has worked in the St. Louis area since 1964 and is still family-owned. If a job needs a second look, our team comes back, takes responsibility, and makes it right.

Every technician carries NATE certification, the trade’s leading independent credential. Martin-Jetco Heating and Air Conditioning also installs equipment from trusted manufacturers, including York, Goodman, Daikin, Carrier, and Trane, so recommendations can be matched to the home, the budget, and the comfort goals.

The company’s track record includes an A+ rating with the Better Business Bureau, six Angie’s List Super Service Awards based on verified customer feedback, and multiple York Dealer of the Year honors.

Want to know what the experience is like? Read our customer reviews before you schedule.

Get clear answers from a Fenton-based HVAC team. Call (636) 205-1631 or schedule service online for repair, replacement, maintenance, or emergency help.

Frequently Asked Questions

What area does Martin-Jetco Heating and Air Conditioning serve out of the Fenton location?

Martin-Jetco Heating and Air Conditioning is based at 1327 West Lark Industrial Drive in Fenton and serves homes and businesses throughout South St. Louis County and the 63026 zip code, including Fenton, portions of Valley Park, Murphy, and the surrounding communities.

My Fenton home was built in the 1970s or 1980s. What should I know going into a replacement?

Homes from that period often have ductwork that was sized for older equipment and has never been sealed or evaluated alongside a system replacement. Installing a new unit without addressing the ductwork limits what the new system can deliver and can result in energy costs that do not reflect the equipment's rated efficiency. Our evaluation covers the ductwork alongside the equipment so the estimate reflects the full scope of the project.

My home is close to the Meramec River. Does that affect my HVAC system?

It can. Homes in lower-lying areas near the river deal with higher moisture during summer, which affects how hard the cooling system has to work and how effectively it dehumidifies. A system that is oversized for the home short-cycles without completing full dehumidification runs, leaving rooms feeling damp even when the temperature is correct. Our evaluation checks system sizing and runtime patterns alongside the standard diagnosis.

How much does HVAC replacement cost in Fenton?

An AC replacement with evaporator coil runs approximately $5,500 to $9,200. A complete system, furnace and AC together, runs approximately $8,450 to $22,990 or more. Ductwork condition, home size, equipment type, and installation access all affect the final number. Call (636) 205-1631 or request an estimate online.

How much does AC repair typically cost in Fenton?

• Minor repairs (capacitors, thermostats): $150 to $600
• Mid-range repairs (blower motors, evaporator coils): $500 to $2,000
• Major failures (compressors, control boards, heat exchangers): $700 to well over $1,000

Our technician confirms the exact cost after diagnosis and compares it against AC replacement before recommending anything.

How much does furnace repair typically cost in Fenton?

• Ignitor and flame sensor: $180 to $350
• Furnace capacitor: $150 to $350
• Blower motor: $500 to $1,400+
• Control board: $700 to $1,650
• Heat exchanger: $2,000 to $4,000

At the control board and heat exchanger level, our technicians compare repair against furnace replacement before pointing in either direction.

My lower level is always uncomfortable compared to the rest of the house. What is causing that?

In Fenton homes where lower levels were finished after original construction, the duct system was typically designed for the main floor only. The lower level relies on whatever conditioned air drifts down from above, which is not enough to maintain comfort. Our technicians evaluate whether a duct extension, a zoning adjustment, or a ductless mini-split for the lower level resolves it.

My furnace cycles on and off without fully heating the house. What does that point to?

Repeated short cycles that do not complete a full heating run are almost always a safety shutdown response. A clogged filter restricts airflow enough to overheat the heat exchanger, which trips the limit switch and cuts the burners while the fan keeps running. Replacing the filter and letting the system cool often clears it. If the problem continues, the limit switch may be failing, the heat exchanger may have a crack, or a control board fault is interrupting the cycle. A cracked heat exchanger is a safety concern, so call (636) 205-1631 if a filter change does not resolve it.

Do heat pumps work well in Fenton's climate?

Martin-Jetco Heating and Air Conditioning offers heat pump services for Fenton homeowners. Modern heat pumps handle Missouri winters considerably better than older equipment. For homes with ductwork in good condition, a heat pump is worth comparing directly against a traditional furnace and AC setup. For homes with distribution issues, our evaluation addresses those first.

How often should HVAC systems in Fenton be serviced?

Before cooling season and before heating season covers most homes. For Fenton properties with older ductwork or equipment approaching the end of its service life, pre-season HVAC maintenance give our technicians the best opportunity to catch developing problems before they become failures during peak demand. 

Is financing available?

Yes. Financing is available for qualifying projects. Our evaluation also covers utility rebates, applicable federal energy-efficiency tax credits, and any current seasonal promotions, so you have the full cost picture before deciding.

Get HVAC Help in Fenton Today

Whether the system needs replacing, a comfort problem has gone undiagnosed, or something needs attention right now, Martin-Jetco Heating and Air Conditioning is right here in Fenton and ready to help. Call (636) 205-1631 or schedule your evaluation online.