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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
When Is It Necessary to Recharge Your Home’s Air Conditioner with Refrigerant?

Some people mistakenly believe that you need to add refrigerant to an air conditioner the same way that you need to add gas to your car. This is especially true for homeowners who might have been working with unqualified air conditioning contractors. In order to break this common misconception, today we’re going to talk about when [...]

Friday 25th July, 2014 READ MORE >>
Summer Ventilation Tips for Your St. Louis Area Home

Jerry Kelly is in the HVAC (heating, ventilation and air conditioning) business. Every homeowner is familiar with the “H” and “AC” portions of that acronym, but people often know much less about the “V.” Even so, ventilation plays a crucial role in the comfort and health of your indoor environment, especially during summer. Today we’re [...]

Wednesday 23rd July, 2014 READ MORE >>
Is Your Air Conditioner Compressor Making Noise? Here’s What it Might Be Trying to Tell You

Your air conditioner’s compressor has a very important task: it compresses refrigerant into a hot gas, which allows heat from your home to be released to the air outside. Without a properly working compressor, it would be impossible for your air conditioner to cool your home. So if your compressor (located in your outside unit) begins [...]

Friday 18th July, 2014 READ MORE >>
Which Direction Should Ceiling Fans Spin in Summer?

Did you know that most ceiling fans can operate in two different directions? One direction is used to improve comfort and efficiency levels during winter, and the other is used for similar effects during summer. So now that we’re in the cooling season here the St. Louis area, which direction should your ceiling fans spin? [...]

Wednesday 16th July, 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 1054 customer reviews

Map of St. Peters, MO

Darla and Roger Yoakum




Thank you


Map of O'Fallon, MO

Fantastic service!!!! Mike is amazing




Mike was very professional and informative. Felt he truly cared about helping and was so polite and knowledgeable regarding our options. You are so lucky he is a part of your team. He was punctual and arrived within an hour of our phone call and including repairs was finished in a timely manner. Mike is a shining star with a great positive attitude. We will be back if service should be needed in the future. Our sincerest thank you, Matt and Trina Batchelor


Map of St. Peters, MO

Fast Service





Map of St. Charles, MO

Fast service





Map of St. Peters, MO

Great Service





Kevin A.

Kevin A.

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

Near Croix Dr, St. Charles, MO 63301
Darin A.

Darin A.

Troubleshooting an air conditioner that broke!

Near W Clay St, St. Charles, MO 63301
St. Charles, MO - Troubleshooting an air conditioner that broke!
Damion O.

Damion O.

Servicing an AC that has malfunctioned.

Near Hyatt Ct, St. Peters, MO 63303
Jason T.

Jason T.

Servicing an air conditioner to ensure proper operation and help lower utility bills.

Near Wenlock Dr, St. Louis, MO 63146
Lonnie L.

Lonnie L.

performing a tune up for a Jerry Kelly customer to prevent break down and lower utility bills

Near Hudson Landing, St. Charles, MO 63303
David G.

David G.

Installing an Emeral fan coil and a/c.

Near McLean Creek Dr, Winfield, MO 63389
Jason T.

Jason T.

Servicing an air conditioner to ensure proper operation and help lower utility bills.

Near Ken Dr, St. Charles, MO 63301
Bryan J.

Bryan J.

Maintaining an AC to ensure proper operation and lower utility bills.

Near Spring Leigh Ct, Ballwin, MO 63011
Michael Y.

Michael Y.

Tuneup a Jerry Kelly Maintenance Club

Near Beckewith Trail, O'Fallon, MO 63368
mike f.

mike f.

Repairing broken air conditioner.

Near S St Peters Pkwy, St. Peters, MO 63303
Del S.

Del S.

Fixing an air conditioner that broke down.

Near Oakmoor Dr, St. Charles, MO 63301
Doug M.

Doug M.

Tune up on a Jerry Kelly Emerald air conditioner

Near Minus Dr, St. Peters, MO 63376
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