Festus, MO · Jefferson County

Furnace Maintenance That Checks How Your System Performs Before Winter Does

Exactly what's wrong. Exactly what it costs. In writing.

A furnace can turn on every day and still have problems developing inside the system. Seasonal maintenance gives ExactAir a chance to inspect the equipment, check how it operates, look for developing wear, and identify conditions that may affect heating performance.

Veteran-Owned · Family-Owned · EPA Certified · Fully Insured · Est. 2025

Signs Your Furnace Is Due for Maintenance

When was the last time your furnace had a proper check?

You don’t need to wait for a no-heat call to have your furnace inspected. Changes in operation, airflow, noise, or heating performance can be good reasons to schedule service before the next stretch of cold weather.

It’s been a year or more — Your furnace may be due for a seasonal inspection.
The furnace sounds different — New rattles, buzzing, clicking, or other noises deserve attention.
Heating feels weaker — The system may not be delivering heat as effectively as it once did.
Airflow has dropped — Weak airflow can affect comfort and overall furnace operation.
The furnace cycles differently — More frequent or unusually long cycles can signal a change in system performance.
Rooms aren’t heating evenly — Noticeable temperature differences may point to airflow or system issues.
Energy use has increased — A change in heating costs can be a reason to check how the furnace is operating.
Winter is approaching — Seasonal service gives you an opportunity to find issues before the furnace is needed every day.

What Happens During a Furnace Maintenance Visit

A furnace tune-up should tell you more than whether the system turns on

ExactAir looks at the furnace as an operating system, not just a piece of equipment. We check the components and performance areas that can affect reliable heating throughout the season.

Furnace Operation Check

We run the furnace through its normal heating sequence and observe how the equipment starts, operates, and shuts down.

Burner & Ignition Inspection

Relevant burner and ignition components are inspected for proper condition and operation based on the furnace design.

Electrical & Control Check

Electrical connections, controls, and applicable components are checked for abnormal operation or visible concerns.

Blower & Airflow Review

We evaluate blower operation and airflow conditions that can affect how effectively heated air moves through the home.

Heating Performance Check

Operating temperatures and other relevant system conditions are reviewed to see how the furnace is performing.

Maintenance Findings

We explain what we found, what appears to be operating normally, and whether anything deserves attention before the heating season gets underway.

Why Jefferson County Homeowners Choose ExactAir for Furnace Maintenance

Focused on the furnace

The maintenance visit centers on the equipment responsible for heating your home, rather than treating every HVAC system the same way.

Operation matters

We run the furnace and observe its performance instead of relying only on a visual inspection.

Potential issues get identified early

Changes in components or system behavior can be addressed before they turn into a larger heating problem.

Straightforward findings

If something needs attention, we explain what we found and why it matters without turning every observation into a repair recommendation.

Owner-level accountability

ExactAir is veteran-owned and family-owned, with a focus on honest communication and careful HVAC service.

Where "Exact" comes from

ExactAir Heating and Cooling was founded in 2025 by Brett Lahue — an Army veteran who learned the trade the old way, checked off job by job under his father, a by-the-book technician himself.

When a job was done right, the answer was always the same word: “Exactly.” The name, and the standard behind it, stuck.

Today ExactAir is a small, owner-operated company serving Festus and Jefferson County — background-checked, EPA certified for both Universal and A2L refrigerants, and insured through Federated Insurance.

— Brett Lahue, Owner & Lead Technician

Furnace Maintenance in Festus & Jefferson County, MO

ExactAir is based in Festus and provides furnace maintenance throughout Jefferson County and the surrounding St. Louis Metro area, generally within about 45 minutes of Festus. A seasonal furnace inspection can help you understand the condition and performance of your heating system before it faces the demands of winter.

Note: A trip fee applies past the standard service radius. Service inside St. Louis city and St. Louis County is currently limited, pending additional licensing there.

What Customers Say About ExactAir's Furnace Service

    
 
 
         
   KEITH CROWDEN 
 
 
 
 Trustindex verifies that the original source of the review is Google. Exactair did a great job installing my new Air Conditioner. Best price exceptional service I highly recommend Exact Air
  
 
        
   james blehm 
 
 
 
 Trustindex verifies that the original source of the review is Google. The technician  found what others couldn't.  He was timely and professional.  Pricing was easily affordable!  I will definitely be using them again for a new split system install. And would recommend to everyone!!
  
 
        
   Carole Kronmueller 
 
 
 
 Trustindex verifies that the original source of the review is Google. Exact AIR Is a wonderful HVAC business They are very efficient , reliable , affordable, and the best part is Brett Will give you personalized attention and make it a point if you have an emergency or not , to make it out and get you up and running. I highly recommend them, and I have shared their contact with several of my family members and friends that have asked. One other  note, it is a veteran owned company🇺🇸🇺🇸🇺🇸🇺🇸
  
 
        
   Guadalupe Rios 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had a great experience with ExactAir Heating and Cooling from start to finish. Mr. Lahue  was  very knowledgeable, efficient, and made sure everything was working properly before leaving. The pricing was fair, and I appreciated the honest recommendations without any pressure to purchase unnecessary services. It's refreshing to work with a company that values quality and customer service. I would definitely recommend them to anyone looking for reliable AC repair or maintenance.  Promote Ahead of Peers.

Frequently Asked Questions

Furnace Maintenance FAQs

How often should a furnace be maintained?

Annual maintenance is a practical schedule for many residential furnaces. The right frequency can depend on the equipment, usage, and its operating condition.

What does furnace maintenance include?

A maintenance visit can include checking furnace operation, ignition and burner components, electrical controls, blower operation, airflow, temperature performance, and other relevant conditions.

Can furnace maintenance prevent breakdowns?

Maintenance cannot guarantee that a furnace will never fail, but it can uncover wear, abnormal operation, and developing problems before they potentially become larger issues.

Does a furnace tune-up improve heating performance?

If the furnace has developed an issue affecting operation, addressing it may improve performance. Maintenance also helps identify whether the system is operating as expected.

When should I schedule furnace maintenance?

Fall is a practical time to have the furnace checked before colder weather arrives, particularly if the system has not been serviced recently.

Is furnace maintenance necessary if my furnace is working normally?

Yes. A furnace can still have developing wear or performance changes even when it is currently producing heat. Maintenance provides an opportunity to inspect those conditions before they become noticeable.

Give your furnace a proper check before the cold weather puts it to work.

Monday–Friday, 7am–7pm · 24/7 emergency service available