Festus, MO · Jefferson County

AC Repair That Starts With a Real Diagnosis, Not a Guess

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

A no-cool call rarely has one obvious cause. Before ExactAir touches a wrench, a technician checks real readings — refrigerant charge, static pressure, electrical draw — so the repair fixes what’s actually wrong, not just what’s easiest to blame. You’ll see the exact findings and the exact price before any repair begins.

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

Signs You Need AC Repair

How do you know it's time to call?

Missouri summers don’t leave much room for a system that’s already struggling. Call before one of these turns into a full breakdown:

What Actually Happens During an AC Repair Visit

What we check before we touch anything

Every AC repair call follows the same six-step ExactAir Method — no shortcuts, no guessing.

Exact Diagnosis

The technician identifies what's actually wrong before recommending any fix — not a first guess treated as a final answer.

Exact Findings

Real equipment readings — refrigerant charge, static pressure, electrical draw — written down, not a verbal impression you have to take on faith.

Exact Options

If a straightforward repair solves it, that's what you'll hear. If the system's condition means a bigger conversation is worth having, you'll see that too — honestly, without pressure either way.

Exact Pricing

The cost of the repair is set and shown to you before any work begins. No surprises once the job is underway.

Exact Testing

Once the repair is done, refrigerant charge, static pressure, and airflow are checked against manufacturer spec — not eyeballed.

Exact Verification

The system is confirmed running the way it's supposed to before the technician calls the job finished.

Why Jefferson County calls ExactAir

Why Jefferson County Homeowners Trust ExactAir for AC Repair

An exact diagnosis in writing

You see what was checked, what was found, and what it costs before any decision gets made.

Real measurements, not guesswork

Actual equipment readings drive the repair, not instinct or the easiest explanation.

No pressure toward replacement

If a dependable repair makes sense, that's what gets recommended — not an automatic push toward a new system.

Work tested before it's called done

Every repair is checked against manufacturer standard before the technician leaves.

Owner-level accountability

Brett Lahue is personally responsible for the result on every repair ExactAir takes on.

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

AC Repair in Festus & Jefferson County, MO

ExactAir is based in Festus and repairs AC systems throughout Jefferson County and the surrounding St. Louis Metro area, generally within about 45 minutes of Festus.

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 Repairs

    
 
 
         
   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.

Common questions

AC Repair FAQs

How much does AC repair cost in Festus, MO?

It depends on what’s actually wrong, which is why ExactAir doesn’t quote AC repair prices over the phone. A technician checks real readings first — refrigerant charge, static pressure, electrical draw — then shows you the exact price before any repair starts. No guessing, no surprise invoice.

Is my AC worth repairing, or should I replace it?

It depends on the age of the system, the cost of the repair, and how it’s been maintained. ExactAir shows both the repair option and the replacement option side by side, with real pricing on each, so you decide — there’s no automatic push toward a new system if a dependable repair still makes sense.

Do you offer emergency AC repair?

Yes — 24/7 emergency service is available. Call or text (314) 893-4707 any time, and Brett will get out to you whether or not it’s during regular business hours.

What's usually wrong when an AC stops cooling?

It varies — a low refrigerant charge, a failing capacitor, a dirty coil, or an electrical issue are all common. That’s exactly why a real diagnosis comes before any repair, instead of guessing at the most common cause.

Do you repair all AC brands?

ExactAir repairs and services the systems already in Jefferson County homes, regardless of brand. Call and describe what’s going on, and we’ll let you know how we can help.

Know exactly what's wrong before anyone touches your AC.

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