HVAC Company Serving University City, MO

University City has some of the oldest housing in St. Louis County, from Tudor Revival and Colonial brick homes south of Delmar to postwar ranches, bungalows, and multi-family buildings. Because many were built before modern cooling, HVAC work often has to account for older ductwork, radiator heat, limited access, additions, and uneven airflow.

Martin-Jetco Heating and Air Conditioning has worked on homes and buildings throughout this part of St. Louis County since 1964 and is still family-owned. Licensed, NATE-certified technicians handle every visit and look at the actual property before recommending a path forward.

Work with a team who puts your comfort first. Call (636) 205-1631 or contact us online to schedule an evaluation with NATE-certified technicians.

How Martin-Jetco Heating and Air Conditioning Helps U City Homeowners & Property Owners

Repair and replacement for every system type:

• AC repair, AC installation, AC replacement
• Furnace repair, furnace installation, furnace replacement
• Heat pump services
• Ductless mini-splits for homes and multi-family units without central ductwork
• Boilers and radiator system service, repair, and replacement

Comfort and air quality:

• Indoor air quality upgrades: whole-home filtration, air scrubbers, humidifiers, dehumidifiers
• Air balancing and thermostat installation and repair

Ongoing care:

• HVAC maintenance and pre-season tune-ups
• Emergency HVAC service at any hour, including evenings, weekends, and holidays

Commercial work:

• Commercial heating and cooling for businesses 

Martin-Jetco Heating and Air Conditioning installs York, Goodman, Daikin, Carrier, and Trane. Financing is available for qualifying projects.

What Does HVAC Replacement Cost in University City?

Replacement costs in University City generally land in one of two ranges, though property type and condition can push projects significantly in either direction:

• 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:

• Square footage and system tonnage required
• Ductwork condition, or whether the home has ductwork at all
• Standard versus variable-speed high-efficiency equipment
• Zoning needs for multi-level or multi-unit properties
• Electrical or code updates needed before installation
• Indoor air quality components added to the project
• Access challenges in historic construction or multi-family buildings

For University City homeowners, an AC replacement with evaporator coil typically runs approximately $5,500 to $9,200, while a complete HVAC system replacement generally ranges from $8,450 to $22,990 or more. In a city where no two properties are quite alike, the in-home evaluation is where the actual figure gets established.

Request an estimate online or call (636) 205-1631 to schedule an in-home evaluation.

How Much Do Common HVAC Repairs Cost?

Repair https://www.martinjetco.com/contact-us/costs can vary by part, system age, equipment condition, and how easy the unit is to access. We handle these calls every day, so we can share working ranges to help you understand when another repair still makes sense and when replacement may be worth comparing:

• 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

Our NATE-certified technician can confirm the exact cost after diagnosing the failure, then help you compare that repair against AC replacement or furnace replacement. If you already have a quote and want a second opinion, call (636) 205-1631.

What Makes University City HVAC Work Different

U City's housing stock creates conditions that newer suburbs simply do not have. Here is what Martin-Jetco Heating and Air Conditioning's technicians encounter most often in this city:

• Homes built before central air existed. A meaningful share of University City's older single-family stock was heated by boilers and radiators and had no ductwork at all. Adding cooling to these properties requires either a duct installation through finished historic interiors or ductless mini-splits that serve rooms independently without touching original plaster and woodwork.
• Boiler and radiator systems still in active service. Many of the Tudor and Colonial homes along Kingsbury Boulevard and in Parkview still run on hot-water boilers. Martin-Jetco Heating and Air Conditioning services, repairs, and replaces boiler systems, and evaluates whether a repair, a high-efficiency upgrade, or a full conversion makes the most sense for each property.
• Multi-family buildings with complex HVAC configurations. University City has a dense concentration of apartment buildings and duplexes, some dating to the 1920s. These properties involve different installation constraints, shared systems, and tenant logistics than a single-family job.
• Historic construction that limits how equipment is accessed. Plaster walls, original woodwork, narrow chases, and architecturally significant interiors in designated historic districts require a different approach than a standard drywall home, both for installation and for routing any new ductwork.
• A north-south split in housing stock. North of Delmar, ranch homes and bungalows present different equipment needs than the larger, older properties south of Delmar. A technician familiar with both sides of the city brings relevant context to either job.

If your home has boiler heat, limited ductwork, historic construction, or multi-family HVAC concerns, Martin-Jetco Heating and Air Conditioning can take a closer look and recommend a plan that fits the property. Call (636) 205-1631 or schedule an in-home evaluation online.

Enjoy Incentives That Reduce What You Pay

The in-home evaluation always includes a review of what is available to lower the project cost:

• Financing for qualifying projects, spread into monthly payments
• Spire utility rebates filed on your behalf when eligible equipment is installed
• Federal energy-efficiency tax credits for qualifying heat pumps and high-efficiency systems
• Current seasonal offers when available at the time of the estimate

Equipment cost, payment options, and applicable savings will be explained by our friendly HVAC technicians before you decide.

Need Emergency HVAC Service in University City?

Some HVAC problems can’t wait, especially when your safety is on the line. Martin-Jetco Heating and Air Conditioning offers emergency HVAC service at any hour, seven days a week, with licensed, NATE-certified technicians dispatched as quickly as conditions allow.

What to expect when you call:

• Calls made in the morning often result in same-day service, sometimes within a few hours
• The technician arrives on site, diagnoses the problem directly, and explains the repair before any work begins
• You receive a firm cost before authorizing anything
• Most repairs are completed the same day or fully scheduled within 24 to 48 hours

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

Where We Work in University City

Martin-Jetco Heating and Air Conditioning serves homeowners, renters, landlords, and businesses throughout University City, including all of the 63130 zip code.

Residential neighborhoods served:

University Heights, Parkview, Ames Place, Maryland Terrace, Kingsbury Place, New Delmar Heights, and homes throughout the city's established residential streets north and south of Delmar Boulevard, including along Kingsbury Boulevard, Balson Avenue, Waterman Avenue, and Olive Boulevard.

Landmarks and institutions near where we work:

Heman Park and the University City Recreation Center, Ruth Park Golf Course, Flynn Park, the Delmar Loop entertainment district, Washington University in St. Louis, the Tivoli Theatre, and the University City Public Library.

Schools in the area:

Flynn Park Elementary, Jackson Park Elementary, Pershing Elementary, Brittany Woods Middle School, University City Senior High School, Christ the King Catholic School, and nearby private institutions.

A Maintenance Plan That Works Year-Round

The Martin-Jetco Heating and Air Conditioning Home Comfort Agreement gives your system a scheduled inspection before each peak season rather than waiting for a problem to surface at the worst time.

What membership includes:

• Pre-season visits before both cooling and heating season
• Complete equipment safety and performance inspection at each visit
• 20% off parts and labor for repairs between scheduled visits
• No overtime charges, any hour, any day
• Priority scheduling for members when an unplanned issue comes up
• Reduced diagnostic fee on calls during regular business hours
• Service documentation satisfying most manufacturer warranty requirements

For University City's older properties, where equipment condition and ductwork quality can vary considerably from one address to the next, consistent pre-season inspection tends to surface developing problems while they are still manageable.

Help your system stay ready before the next heat wave or cold snap. Ask about the Home Comfort Agreement when you call (636) 205-1631.

What Sets Martin-Jetco Heating and Air Conditioning Apart

• In business since 1964, still family-owned. The company was already serving homes in this part of St. Louis County before much of University City's postwar housing stock was finished.
• Every technician is NATE-certified. NATE is the industry's leading independent credential, which means every visit is handled by someone tested on real-world HVAC competency.
• No single-brand pressure. Martin-Jetco Heating and Air Conditioning installs York, Goodman, Daikin, Carrier, and Trane, so the equipment recommendation is driven by the home, not a manufacturer relationship.
• A record that is publicly verifiable. An A+ rating with the Better Business Bureau, six Angie's List Super Service Awards, and recognition as a York Dealer of the Year multiple times.

If you'd like a sense of what working with the team is like, we invite you to check out our 1,000+ 5-star Google reviews, written by homeowners across the region who have had Martin-Jetco Heating and Air Conditioning out to their own homes.

Frequently Asked Questions

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

Martin-Jetco Heating and Air Conditioning serves all of University City and the 63130 zip code, along with neighboring communities.

Can you add air conditioning to a home that only has radiator heat?

Yes, and this comes up regularly in University City. Two approaches are practical:

• Ductless mini-splits: These work without any existing ductwork, delivering cooling directly to individual rooms without touching plaster walls or original woodwork. A strong fit for historic properties.
• Central air with new ductwork: Where there is space to run ducts discreetly, this provides whole-home coverage through a traditional system.

The right choice depends on the home's layout, historic significance, and how the owner wants to use the space. Our in-home evaluation covers both; call (636) 205-1631 to schedule today.

Do you service boilers and radiator systems?

Yes. Boiler work is part of Martin-Jetco Heating and Air Conditioning's regular work in University City, where many older homes still heat with hot-water systems. The team handles diagnostics, repairs, seasonal maintenance, and full boiler replacements, and can evaluate whether maintaining the current system or converting to a different setup makes more sense for a given property.

How much does HVAC replacement cost in University City?

Two ranges apply to most projects:

• AC and evaporator coil replacement: approximately $5,500 to $9,200
• Complete system replacement: approximately $8,450 to $22,990 or more

University City's older construction and diverse property types mean the actual figure depends heavily on what the technician finds at the property, particularly regarding ductwork and access. Call (636) 205-1631 or request an estimate online.

How much does AC repair typically cost in University City?

Repair costs depend on the specific component involved:

• Minor components (capacitors, thermostats): $150 to $600
• Mid-range repairs (blower motors, evaporator coils): $500 to $2,000
• Major failures (compressor-related, control board, heat exchanger): $700 to well over $1,000

Martin-Jetco Heating and Air Conditioning provides the exact cost after diagnosis and explains whether repair or replacement makes more financial sense before any work begins.

How much does furnace repair typically cost in University City?

Common repair costs to plan around:

• Ignitor replacement: $180 to $350
• Flame sensor: $180 to $340
• 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 higher end of that range, replacement is worth comparing directly before committing to a repair. Call (636) 205-1631 for a furnace diagnostic visit.

My AC runs but the house is not cooling properly. What should I check?

Several things can cause this, and the right answer depends on the property type:

• In homes with original ductwork, gaps and unsealed joints are a frequent culprit, losing conditioned air before it reaches living spaces
• In homes with no ductwork where a central system was added later, improper sizing or routing is common
• Across all property types: low refrigerant, a dirty filter, a fouled condenser coil, or a failing capacitor can each prevent the system from cooling effectively

A technician checks refrigerant levels, measures airflow at the registers, and inspects ductwork and equipment before recommending an AC repair or something more involved.

My furnace is running but blowing cold air. What does that indicate?

The blower fan can operate independently from the burners, which is why cold air comes out even when the system appears to be running. Common causes include:

• Tripped limit switch, often triggered by restricted airflow from a clogged filter
• Ignition failure or flame sensor fault preventing the burners from lighting
• Control board fault interrupting communication between the thermostat and the burners
• Gas supply interruption

Because this involves gas and combustion components, call (636) 205-1631 for a proper diagnosis rather than cycling the system off and on repeatedly.

Are heat pumps practical for University City homes?

For many properties, yes. Martin-Jetco Heating and Air Conditioning offers heat pump services that consolidate heating and cooling into a single system. 

How often should HVAC systems in University City homes be serviced?

Twice a year is the standard, but University City's housing stock makes consistent maintenance especially important:

• Pre-1950 homes with original or modified ductwork benefit from annual inspection to catch deterioration early
• Boiler systems have their own seasonal maintenance needs distinct from forced-air equipment
• Any property where multiple system types coexist needs each system evaluated on its own schedule

Is financing available?

Yes. Qualifying projects can be financed at 0% interest. The evaluation also covers Spire rebates, applicable federal energy-efficiency tax credits, and current seasonal offers so the full cost picture is clear before you decide. Learn more about financing options here.

Get the Right HVAC Answer for Your University City Property

Whether the property is a historic Tudor south of Delmar, a postwar ranch near Heman Park, or a multi-family building near the Loop, Martin-Jetco Heating and Air Conditioning can help you figure out what the system actually needs and what it will cost to address it. Call (636) 205-1631 or schedule your evaluation online.