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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.
Read More >>
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.
Read More >>

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
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 >>
How to Maximize Air Conditioner Performance This Summer in the St. Louis Area

With summer in full swing, we here in the St. Louis area have already used our air conditioners quite a bit this year. But do you know if your air conditioner is working at its maximum performance levels to keep your home as comfortable as possible? To help you get it there, today we’re going [...]

Friday 11th July, 2014 READ MORE >>
What is Air Filter Pressure Drop and How Can You Minimize It?

Air filters are hugely important to our home’s heating and cooling systems. That’s because not only do they protect your system from dirt buildup and damage, but they also help clean the air you breathe. However, one consequence of using air filters is that they create a pressure drop in your system. Today we’re going [...]

Wednesday 9th 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?
Learn More >>

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.
Learn More >>

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.
Learn More >>

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.
Learn More >>

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 1028 customer reviews

Map of O'Fallon, MO

Kevin delivered an exellent job.





Map of St. Peters, MO

great service




very service and explaned things very well


Map of O'Fallon, MO

Long time customer




I've used Jerry Kelly's services for more than 4 years exclusively because of the quick service calls and customer service level of the technicians.


Map of St. Peters, MO

Great service, courtious employee





Map of O'Fallon, MO

AC repair




Timely and quality work


Will L.

Will L.

Repairing an air conditioner that had malfunctioned.

Near Veterans Memorial Pkwy, St. Peters, MO 63376
Darin A.

Darin A.

Troubleshooting an air conditioner that broke!

Near Vail Dr, O'Fallon, MO 63368
O'Fallon, MO - Troubleshooting an air conditioner that broke!
Bruce B.

Bruce B.

FIXING AN AC THAT BROKE

Near S Outer Rd, Manchester, MO 63021
Jesse C.

Jesse C.

Servicing a Jerry Kelly AC to ensure proper operation and lower utility bills.

Near Co Rd 538, Troy, MO 63379
Jesse C.

Jesse C.

Servicing a Jerry Kelly AC to ensure proper operation and lower utility bills.

Near Co Rd 538, Troy, MO 63379
Jesse C.

Jesse C.

Servicing a Jerry Kelly AC to ensure proper operation and lower utility bills.

Near Co Rd 538, Troy, MO 63379
Jeff T.

Jeff T.

Servicing a Jerry Kelly Emerald air conditioner to ensure proper operation and lower utility bills.

Near Kehrs Mill Rd, Chesterfield, MO 63017
Will L.

Will L.

Repairing an air conditioner that had malfunctioned.

Near St Paul Ln, O'Fallon, MO 63366
Kevin A.

Kevin A.

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

Near Elm St, St. Charles, MO 63301
Darin A.

Darin A.

Troubleshooting an air conditioner that broke!

Near Eureka Ct, Wentzville, MO 63385
Wentzville, MO - Troubleshooting an air conditioner that broke!
Darin A.

Darin A.

Troubleshooting an air conditioner that broke!

Near Eureka Ct, Wentzville, MO 63385
Wentzville, MO - Troubleshooting an air conditioner that broke!
Del S.

Del S.

Fixing an air conditioner that broke down.

Near Brookshire Dr, St. Peters, MO 63376
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