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R410A Refrigerant: What's Next

Learn about industry changes to air conditioner refrigerant and what St. Louis County homeowners can expect after the R22 refrigerant phase out. Read more!

What Is A SEER Rating?

It's one of the most important factors you should take into account when you're choosing a unit. So what is a SEER rating and what does it mean?

Preventative Maintenance Benefits

Spring snuck up on us a little early this year in the St. Louis area, which is all the more reason to start getting ready for the cooling season! Get the tips!

Jerry Kelly Helps Family in Need
Last fall, the family discovered that bad air quality in their home was causing Lizzy to get constantly sick. When Jerry Kelly heard about it, they did more than offer sympathy. They drew upon their expertise, and took action.
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Yes, Virginia, There are Polite Technicians
I had just about given up on seeing clean cut, polite technicians and installers in our industry. Many people say they don't exist. Learn More >>

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O'Fallon man feels lucky to be alive
Vincent Celano said he felt lucky to be alive after recovering from carbon monoxide poisoning. Emergency crews rescued Celano, 54, after he passed out in his O'Fallon home. Celano spent the night at St. Luke's in Chesterfield.
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Family, strangers make a difference
Dale Franklin never thought the simple ringing of a bell would sound so good. But when Dale and Belinda Franklin's daughter, 6-year-old Izzy, rang a bell in early February to signal the end of her chemotherapy, the tone also signaled a new chapter for the family.
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St Charles Heating & Air Conditiong Specialists

Jerry Kelly Heating & Air Conditioning: Your St Charles AC Repair & Installation Contractor

Check Out The Latest On The Jerry Kelly Blog
How to Clean a Condensate Drain Line in Your St. Louis Area Home

One of the most common air conditioner problems that homeowners encounter is a clogged condensate drain line. This can be a serious problem, because it causes water to leak on and around your air conditioner, which can damage your system and your home. Today we’re going to talk about how to clean a condensate drain line so [...]

Friday 22nd August, 2014 READ MORE >>
Things to Do Before Leaving on Vacation to Protect Your Air Conditioner and Your Home

Although it’s getting late into the summer, many families in the St. Louis area are still planning to take vacations this year. And if you’re going to be leaving your house empty for a number of days, you might be wondering what you should do about your air conditioner while you’re gone. That’s why today [...]

Wednesday 20th August, 2014 READ MORE >>
Answers to Some of the Most Frequently Asked Air Conditioning Questions

We’re well into summer, which means Jerry Kelly’s technicians and installers have already visited many, many homes here in the St. Louis area. During our visits, homeowners ask a number of great questions about their air conditioning systems. Some of these questions get asked more often than others, so we thought it would be a [...]

Friday 15th August, 2014 READ MORE >>
Air Conditioner Preventive Maintenance: What Happens If You Do NOT Schedule it Every Year?

Here at Jerry Kelly, we believe that one of the most important things that you can do for your air conditioner is schedule a professional tune-up every year. Another term that we use to describe annual tune-ups is preventive maintenance, because it is the best way that you can prevent future problems with your cooling system. [...]

Wednesday 13th August, 2014 READ MORE >>
Why Regular Maintenance Is So Important To Your Cooling System

What is Sick House Syndrome and Why Should St. Louis Homeowners Know About It?
Although Mother Nature has its own way of cleaning the air outside, the same can't be said for our homes. In fact, over the past 30-40 years, our homes have become more and more susceptible to polluted air — a phenomenon known as sick house syndrome.

So what is sick house syndrome and how can you protect your family from its harmful effects?
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What is a Home Air Cleaner and How is it Different Than a Filter?
Many St. Louis area homeowners are familiar with air filters and how they help protect your furnace from airborne particles. But did you know you have another option for protecting your furnace that also helps keep your family healthy? It's called a home air cleaner, and it's a great way to improve the air quality in your home.
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Gas Furnace Maintenance Tips for St. Louis Area Homeowners
Now that we've settled into the heating season here in the St. Louis area, it's a good time to talk about gas furnace maintenance and what you can do to keep your unit running smoothly throughout the winter.
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How Does a Heat Pump Work?
Although gas furnaces are the most common type of heating system found in St. Louis area homes, heat pumps are another great option for anyone who is looking to save energy and lower utility bills.

These highly efficient units can actually be used to both heat and cool your home. Since it is winter, we'll focus on explaining how a heat pump can heat your home, but it's worth noting that the process is simply reversed to cool your home during the summer.
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Jerry Kelly Testimonials

A NATE Certified Jerry Kelly Service Technician arrived just one hour after Tracey called to have her broken air conditioner fixed. She was so happy that she wanted to tell the world. See more >>


From Our Customers, Directly To You
The service with Jerry Kelly is always top notch. Our tech was wonderful, very informative and courteous.
-Stephanie T.

The technician was so nice — worth every penny! Also, he wore booties and I love that.
- Kim T.

Tech was most pleasant and informative one I have had of any type of tech I have had out here. Great appearance too! Means a lot!!
- Todd D.

Very pleased with furnace/a/c and glad we had both systems installed at same time. Techs are always impressively efficent and polite.
- Michael V.

Both systems run fine. Your company is always right on time, pleasant and very helpful. Thank you.
- Kathy C.

Thanks for coming out on short notice!! Your business hours are great.
- John W.

Your serviceman was the most courteous and knowledgeable. He's a "keeper".
- Artys G.

Audio Testimonials

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Local Reviews

Rated 4.9 out of 5 stars based on 1156 customer reviews

Map of O'Fallon, MO

Fast and Efficient





Map of St. Charles, MO

Trust Lonnie





Map of St. Charles, MO

Companies have one shot to impress.....




...and they did. Called for A/C service after hours and had a return call in less than 5 minutes. Mike was at the house the next morning (it was storming night called and couldn't work outside) 1/2 hour before his scheduled time and was very pleasant, did his job well and had a great customer service and friendly being about him. He explained my issues and was very prompt in his work and fixing my air. For a first time visit I am very pleased. I joined their service member club because its the company I will always call for service and maintenance. Mike sold me on Jerry Kelly


Map of St. Charles, MO

Outstanding professional service, amazing price for complete unit.




Mike did an outstanding job and I am so pleased that he and his team were assigned to install my unit. also Steve made the initial call and he answered my questions to help me decide to buy a new unit.


Map of St. Charles, MO

Great service




Showed up 10 min after I called. Very much appreciated!!


Michael Y.

Michael Y.

Install Jerry Kelly Emerald Furnace and AC

Near Tecumseh St, St. Charles, MO 63301
Joe P.

Joe P.

installing new high efficiency emerald system

Near Silas Ct, St. Charles, MO 63304
Mike F.

Mike F.

Repairing broken air conditioner.

Near Technology Dr W, Weldon Spring, MO 63304
Bryan J.

Bryan J.

Servicing an AC that has malfunctioned.

Near Sun Lake Dr, St. Charles, MO 63301
Will L.

Will L.

Repairing an air conditioner that had malfunctioned.

Near Danielle Elizabeth Ct, O'Fallon, MO 63366
Kevin A.

Kevin A.

Servicing a Jerry Kelly Emerald AC for proper operation and to help lower utility bills

Near Telluride Dr, St. Peters, MO 63376
Kevin A.

Kevin A.

Servicing a Jerry Kelly Emerald AC for proper operation and to help lower utility bills

Near Telluride Dr, St. Peters, MO 63376
Lonnie L.

Lonnie L.

repairing broken air conditioning for Jerry Kelly customer

Near Blase Station Rd, St. Charles, MO 63301
David G.

David G.

Installing a new coil.

Near Englewood Ct, St. Peters, MO 63376
Mike F.

Mike F.

Repairing broken air conditioner.

Near Virginia Dr, Ellisville, MO 63011
Will L.

Will L.

Repairing an air conditioner that had malfunctioned.

Near Belltower Dr, St. Peters, MO 63376
Daniel S.

Daniel S.

Tuning up and cleaning an AC unit.

Near S Lakeridge Ct, Lake Saint Louis, MO 63367
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Jerry Kelly Heating and Air Conditioning, Inc. | 800 N 2nd Street | Saint Charles, MO  63301 | 636-757-8506
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