Furnace Tune-Up Cost in St. Louis: What to Expect
In the St. Louis area, a furnace tune-up typically runs about $125 to $200, according to Angi’s St. Louis cost data. You will also see advertised specials well below that. The number on the flyer matters less than what the technician actually does with the hour or so they spend at your furnace.
We are Ricotta Heating & Air, a family-owned HVAC company serving St. Louis County and Jefferson County. We don’t publish a flat tune-up price on our site, and we won’t make one up here. What we can do is show you how to read any quote, what a complete tune-up covers, and how to decide whether it is worth it for your house.
TL;DR
- Expect roughly $125 to $200 for a furnace tune-up in St. Louis, per Angi. Rock-bottom specials often cover a quick visual check, not a real inspection.
- A good tune-up includes combustion and carbon monoxide testing, a look at the heat exchanger, and measured readings, not just a filter swap.
- The U.S. Department of Energy says regular maintenance can cut heating and cooling costs by 5% to 10% and extend equipment life.
- Book in early fall. Once the first hard cold snap hits, schedules fill and emergency calls take priority.
Table of Contents
- What a furnace tune-up costs in St. Louis
- Why the cheapest special can cost you more
- What a proper tune-up includes
- Is a furnace tune-up worth it?
- How often, and when in the year
- What you can do yourself between visits
- Our perspective: a tune-up should earn your trust
- Book your furnace tune-up with Ricotta
- FAQ
- Sources
What a furnace tune-up costs in St. Louis
Prices vary by company, furnace type and what is bundled in. Here is how the common options usually look from the homeowner’s side:
| Option | What you typically get | What to watch for |
|---|---|---|
| Low-priced seasonal special | A short visit, filter check, quick visual look | Often a doorway to an upsell. Ask what is tested and what is not |
| Standalone tune-up at a typical rate | Full inspection, cleaning, safety and combustion checks, written findings | Ask for the readings in writing |
| Maintenance plan (monthly or annual) | Scheduled tune-ups for heating and cooling, sometimes with other benefits | Read what is covered and whether repairs are discounted |
The $125 to $200 range from Angi is a useful reference point, and it matches what we hear from homeowners who have been quoted around town. Treat it as a planning figure, not a quote. Your furnace’s age, how easy it is to reach (a tight crawlspace or attic is slower than a basement), and whether it is a standard-efficiency or high-efficiency unit all affect the time involved.
We don’t list a tune-up price on our site, so the honest way to learn our number is to call or book through our heating page. We tell you the service call cost before anyone comes out.
Why the cheapest special can cost you more
A $59 or $79 tune-up can be legitimate. It can also be a loss leader, where the visit is priced to get a technician inside your home and the real money comes from recommendations. You are not being paranoid if you wonder about that. It is a common complaint among homeowners.
Three questions sort the two quickly:
- What exactly is measured? A real tune-up produces numbers: carbon monoxide at the flue, temperature rise across the furnace, and blower motor amp draw. If the answer is “we check everything,” push for specifics.
- How long will the visit take? A thorough job on a standard gas furnace takes real time. A 20-minute visit can’t cover a combustion analysis plus cleaning.
- What happens if you find a problem? You should get a plain explanation, a price, and no pressure to decide on the spot.
If you want to see what we think a complete visit looks like, our furnace tune-up checklist lays out the CO, temperature rise and amp draw checks you should demand from any contractor.
What a proper tune-up includes
Here is the work we expect from a thorough furnace tune-up, whoever does it:
- Filter inspection and replacement. A clogged filter is like breathing through a pillow: the blower strains, airflow drops and the furnace runs longer. The Department of Energy’s building science training notes that a dirty filter reduces airflow, increases run time and adds wear on the motor.
- Burner and ignition check. Cleaning or inspecting the burners, igniter and flame sensor. A dirty flame sensor is a classic cause of a furnace that lights and then shuts off.
- Heat exchanger inspection. This is the metal barrier between combustion gases and the air you breathe. Cracks are a safety issue, not a comfort issue.
- Combustion and carbon monoxide testing. Measuring what the furnace puts out, and confirming the venting carries it outside.
- Temperature rise and airflow. Comparing supply and return air temperatures against the manufacturer’s range.
- Blower motor and electrical checks. Amp draw, capacitor condition, wiring connections.
- Thermostat and safety controls. Confirming the furnace starts, runs and shuts down the way it should.
- Condensate drain and vent check on high-efficiency models, where a clogged drain can shut the unit down.
IMPORTANT: Carbon monoxide has no smell. Spire, the St. Louis-area gas utility, recommends that gas equipment and venting be inspected annually by a licensed professional and that UL-listed CO detectors be installed throughout the home. If anyone in your home has dizziness, nausea, headaches or fatigue and you suspect CO, leave the house and call 911.
Is a furnace tune-up worth it?
For most St. Louis homes, yes, and the reasons are practical rather than magical.
It can lower your bills. The Department of Energy’s guide says a regular maintenance schedule can reduce heating and cooling costs by 5% to 10%. Heating is also the biggest energy user in most homes: DOE puts it at about 29% of a typical utility bill. On a winter bill of a few hundred dollars, that kind of saving gets you a good part of the way toward the cost of the visit.
It catches small problems early. A weak capacitor or a dirty flame sensor costs little to fix in October. In January at 2 a.m., the same failure is an emergency call.
It protects your warranty. Many manufacturers expect documented annual maintenance. Check your paperwork, because requirements differ by brand.
It is a safety check. For a gas furnace, this may be the strongest reason on the list.
Where a tune-up is less valuable: on a furnace that is already well past its expected life and showing repeated failures. There the money is better spent on an honest conversation about replacement. Our guide on when to replace your furnace gives three rules for deciding, and our furnace replacement cost breakdown shows what St. Louis homeowners face if it comes to that.
How often, and when in the year
The standard advice is once a year, ideally in the fall before the heating season starts. In the St. Louis area, that means September through early November. Our own guide to HVAC service frequency covers how that plays out for local homes, and our fall prep article walks through the rest of the winter checklist.
Timing matters for a second reason. Industry coverage in 2026 describes continued pricing pressure from higher input costs for copper, steel and aluminum, and equipment prices are not falling. When replacement costs this much, more homeowners choose to repair older units instead, which tends to pile work onto contractors in the coldest weeks. Booking your tune-up early gets you a calmer appointment, and if the technician finds something, you have time to plan rather than scramble.
It’s now mid-October, so if you haven’t had your furnace looked at this year, this is a good week to schedule it.
What you can do yourself between visits
There are a few things a homeowner can safely do. They make the professional tune-up work better, and the DOE’s whole-house approach supports all of them.
- Change the filter on schedule. Check it monthly during heating season. Most one-inch filters need replacing every one to three months, but a house with pets or a lot of dust may need it more often.
- Keep registers and returns clear. Rugs, couches and curtains block airflow and make the system work harder.
- Keep outdoor vents clear. Spire recommends sweeping snow and ice away from exhaust vents so gases can leave the house.
- Test your CO detectors and replace the batteries.
- Listen and look. New rattling, a yellow instead of blue burner flame, or a furnace that turns on and off every few minutes (short-cycling) are reasons to call, not to wait.
Do not open the burner compartment or work on gas components yourself. That is for a licensed technician.
Filter quality is worth a moment’s thought. Higher-rated filters catch more fine particles, but a denser filter also restricts airflow if your system isn’t built for it. For a clear picture of how filtration classes are rated in ventilation systems, this guide to air filtration classes is a helpful technical reference (it is in Italian). If you want a recommendation for your own furnace, ask your technician which rating your blower can handle.
Our perspective: a tune-up should earn your trust
We have worked in St. Louis and Jefferson County homes for 50 years, from older brick houses in Affton and Crestwood to newer builds out toward Arnold and Cedar Hill. Here is what that taught us about tune-ups.
The price is the least interesting thing about one. What matters is whether you walk away knowing the true condition of your furnace. We would rather tell you your furnace has several good winters left than sell you something you don’t need. That is the whole reason we built our business around honest diagnostics and clear recommendations, with no pressure and no upselling.
We also think a tune-up should leave a paper trail: what was tested, what the readings were, what we recommend now and what can wait. If a contractor can’t hand you that, the visit was a sales call with a screwdriver.
And we service all major brands, so you don’t need to have bought your furnace from us to get the same careful look.
— Alan Ricotta
Book your furnace tune-up with Ricotta
We provide furnace tune-ups, furnace repair, emergency heating repair and furnace installation for homeowners across St. Louis County and Jefferson County. You can see everything on our heating services page. If you would rather spread the cost and never think about scheduling again, ask about our maintenance plans, which cover regular tune-ups. For details on what they include and the cost, contact us directly, since we don’t list a price online.
Heating and cooling tune-ups can often be paired, and our AC tune-up cost guide explains what that side of the work covers.
FAQ
How much is a tune-up on a furnace in St. Louis?
A typical range is about $125 to $200 according to Angi’s St. Louis data, though advertised specials can be lower. The price depends on the furnace, the company and what is included. Ask for a written list of what will be tested before you book.
Is it worth it to get a furnace tune-up?
Usually, yes. The Department of Energy says a regular maintenance schedule can cut heating and cooling costs by 5% to 10%, and for a gas furnace the carbon monoxide and venting checks are a safety benefit. If your furnace is very old and failing often, ask the technician for an honest repair-versus-replace opinion.
How often does a furnace need a tune-up?
Once a year, ideally in the fall before cold weather arrives. For gas equipment, Spire also recommends annual inspection by a licensed professional. Change your filter between visits.
Are furnace prices going up in 2026?
Trade coverage says manufacturers are still dealing with higher costs for copper, steel, aluminum and tariffs, and further increases are possible. A tune-up can’t change that, but it helps you catch problems early so a replacement is planned rather than forced in the middle of winter.
Sources
- Angi: How Much Does Furnace Repair Cost in St. Louis?
- U.S. Department of Energy: Guide to Home Heating and Cooling
- Building Science Education: HVAC Preventative Maintenance
- Spire: Carbon Monoxide Safety Tips
- ACHR News: Price Increases Remain Part of the Residential HVAC Outlook